Applies To Product(s): AutoPIPE, Version(s): 2004, XM, & V8i Environment: N/A Area: Load Cases Subarea: Original Author: Bentley Technical Support Group Comments, Questions, and Answers Item #1: Can I copy in Response Spectrum values into the Response/Force Spectrum Loads dialog? Item #2: How to create a Response Spectrum analysis? Item #3: How to create an ASCII Spectrum File? See Also Bentley AutoPIPE External Links Bentley Technical Support KnowledgeBase Bentley LEARN Server Comments or Corrections? Bentley's Technical Support Group requests that you please submit any comments you have on this Wiki article to the "Comments" area below. THANK YOU!
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Wiki Page: 02k. "Response / Force Spectrum Loads" - AutoPIPE Load Case
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Wiki Page: 02s. "Buoyancy" - AutoPIPE Load Case
Applies To Product(s): AutoPIPE, Version(s): 2004, XM, & V8i Environment: N/A Area: load case Subarea: Original Author: Bentley Technical Support Group Comments, Questions, and Answers Q1. How is Buoyancy added in AutoPIPE? Answer: In AutoPIPE buoyancy weight is applied in GR case. It has both longitudinal and transverse components. When the pipe is vertical, difference in pressure cap forces is the same as buoyancy load and the transverse buoyancy is zero. When the pipe is horizontal, the cap forces from external hydrostatic load adds longitudinal stress and associated movements in addition to non zero transverse (vertical) buoyancy load. Q2. Is Pipe insulation and Cladding accounted fro in bouyancy? Answer : Form the online help: Clad thickness: For wind loading, hydrotest, buoyancy and wave loading, the total diameter of pipe includes the cladding thickness. Insulation thickness: The insulation thickness is also used to calculate the surface area of the pipe for wind loads and buoyancy effects. Q3. How do I know if Buoyancy loads are being applied to the pipe? Answer : At this time there is no single reported value in AutoPIPE for the total Buoyancy at each node point or for the entire model. Workaround, must have 2 identical models, where the only differency is in one model, apply Load> Buoyancy as required, and then compare the results of all the vertical support loads under GR load case. The difference between the total vertical support values between both models is the buoyancy load applied to the piping. Remember All points with a vertical coordinate value less than the "Water surface elevation" value specified on the Load> Buoyancy dialog will be considered submerged (buoyancy load is applied). Piping above this value will be considered above water and NO buoyancy will be applied. In addition, confirm Segment tab on the input grid, "Apply Buoyancy" column for check boxes where Buoyancy load is to be consideration for above / below "Water surface elevation" value: Q4. Can you please explain the difference if any in how hydrodynamic loads are applied to both pipe sections utilising soil springs and pipe sections utilising v-stop supports. Answer : In short there is not much difference. The pipe is supported by either soil springs or V-stop supports. The buoyancy load is another load case applied to the pipe as with any other load case (i.e. Wind). As you know buoyance load is applied with the gravity (GR) load case (combined total of dead weight and bouyancy weight). Also becuase of the general nature of the different supports, pipe movement may be restricted more so by a given soil springs than a V-stop. Regardless, when GR is evaluated the pipe will move as the supports will allow. See Also Bentley AutoPIPE External Links Bentley Technical Support KnowledgeBase Bentley LEARN Server Comments or Corrections? Bentley's Technical Support Group requests that you please submit any comments you have on this Wiki article to the "Comments" area below. THANK YOU!
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Wiki Page: 02t. "Wave" - AutoPIPE Load Case
Applies To Product(s): AutoPIPE, Version(s): 2004, XM, & V8i Environment: N/A Area: Subarea: Original Author: Bentley Technical Support Group The Load> Wave command enables the user to model the effect of ocean waves impacting a partially submerged piping system. The Wave command uses static analysis to model hydrodynamic effects. A given static analysis computes the response of the structure to a static load representing the force distribution at a given instant of the wave loading cycle (defined by the phase angle, q). Thus, a series of these instantaneous static analyses can be used to trace out the system response over the entire wave cycle. Comments, Questions, and Answers AutoPIPE does not print any calculated wave results. Internally, the wave results are converted as loads on the piping. AutoPIPE modeling suspended piping from from vessel, platform, or buoyancy modules should be limited to vertical riserr as a snakeing catenary shape as seen below cannot be modeled in AutoPIPE. In AutoPIPE buoyancy weight is applied in GR case. It has both longitudinal and transverse components. When the pipe is vertical, difference in pressure cap forces is the same as buoyancy load and the transverse buoyancy is zero. When the pipe is horizontal, the cap forces from external hydrostatic load adds longitudinal stress and associated movements in addition to non zero transverse (vertical) buoyancy load. Waves forces are applied at bend nodes (near, far and if present a mid point). Qestion: It appears that AutoPipe can only input one drag and inertia coefficient per wave. Is there a way to enter multiple drag and inertia coefficients for different size pipes? Answer : Yes, use can Insert> Xtra data> Hydrodynamic data for each point or selected range. Wave loading beyond water depth: When a user defined current profile (depth - 0 to 115 ft , for example) does not cover the entire range of submerged pipe (Water elevation to Depth: 0 to 270 ft ) AutoPIPE extrapolates the current velocity as explained below. In the above instance, for depths between 115-270 ft, index is set to 5 and the following equations are usedV=VCUR_index+DVWhere, DV=(DCUR_index-DFP) ((VCUR_(index-1)-VCUR_index )) / ((DCUR_index-DCUR_(index-1)) ) …..(i.e. difference in depth x slope) DCUR - current depth from table (DCUR4 = 75 ft, for example) VCUR - current velocity from table (VCUR5 = 1500 ft/s, for example) DFP - depth of the point below 115 ft Index - index of the table. When DFP > DCUR5, AutoPIPE sets index = 5This set of equations creates a linearly varying velocity profile for depths below 115 ft: If decreasing velocity was defined between index 4 & 5 i.e. depth 75 & 115 ft, then this profile would've been linearly decreasing below 115 ft. Note that it may not necessarily reach 0 at depth of ocean bed. The affects wave force calculation has not yet been investigated to see any affects. Question: How many nodes do we need to put on the pipeline in order to simulate the hydrodynamic forces same as while we are defining the CD and CM in the wave load interface (from Wave/Load)? Answer: One approach, duplicated the same number of node points per span equal to the number of mass points per span calculated by AutoPIPE. Question: Since the wave load interface doesn't have the space that we can input the lift coefficient, how can we define the lift coefficient if we don't want to use the function defined in "Insert> Xtra Data> Hydrodynamic data"? Answer : The Lift coefficient for all points is assumed zero unless identified by Insert> Xtra Data>Hydrodynamic Data. Question: Are there any sample models for incorporating wave loading imposed displacements? Answer: In the Advanced training we have 2 models showing imposed wave displacements from the platform.RISER_SEABED_SOIL_2.dat RISER_SEABED_VSTOPS_1.dat Question: for wave loading, can you specify the location in the model where the wave phase angle is occurring, or is it just based on the origin? Answer : Wave loading phase is specified to occur at the model's origin point only. Question: In AutoPIPE modeling, marine growth thickness are specified under Wave loading, however marine growth density data filling is not indicated anywhere. How to input marine growth density? Answer : Marine growth is attached to the submerged structure. The marine growth thickness value is used to calculate the effective diameter to be used in force calculations. Marine growth is assumed zero above still water level. Currently, there is no calculation that takes into account the weight of marine growth. However this weight can be accounted for by adding a distributed load over the area of pipe affected. Select Insert and then Distributed Load . Question: In my model the seabed is used as the global-Y zero coordinate. The water is 185.5m deep, so the water elevation's global y-coordinate is 185500 (in mm) and this is the value entered in the buoyancy data table. In the wave data table the water elevation and depth are both listed as 185500. I am unsure on how to enter the current depths based on this set-up. Is it appropriate to list the current depths relative to the water elevation (i.e. the seabed is 185500 mm below the surface hence its height value would be -185500mm and the surface a value of 0) or relative to the global y coordinates (i.e. the seabed listed as 0, the water surface as 185500mm)? Answer : With an open AutoPIPE model, select Load> Wave, press the help button, and select the Wave Theory link. Here you will see a picture of the wave parameters. The Water - elevation is the Still Water Level in the image. You would enter the actual vertical global coordinate location (185500 mm). The Depth is measured from the water body surface to the sea/lake bed (this is a positive value, in your case = 185500). The Water depth profile, Enter the water depth relative to the water body surface elevation specified above for the corresponding current and growth data. Again these data points are positive values from the Water elevation. Question: If an insulation thickness is provided for a member, does AutoPIPE adjust the effective diameter for wind/wave force calculations? Answer : Yes. Checked the Stream Function Wave water velocities at the following net link: http://www.coastal.udel.edu/faculty/rad/streamless.html Suggest performing an complete review of the wave by adding multiple wave loading with same data but assigning different phase angles U1-U5 = 0,45,90,135,180. The forces on the pipe are the sum of drag (velocity) and Inertia(acceleration). The chart below is a manually calculated with these values using Airy Wave. Note: The maximum force due to drag occurred at 0 deg phase angle, while maximum force due to inertia occurred around 90+/- deg phase angle. For this wave, with the given parameters, total max force on the pipe, sum both curves, occurred at approximately 90+/- deg phase angle. Hydrodynamic factors are only applied to physical points in the model. They are not interpolated for soil and mass points. Only imposed displacements are interpolated and applied to mass points. See Also Bentley AutoPIPE External Links Bentley Technical Support KnowledgeBase Bentley LEARN Server Comments or Corrections? Bentley's Technical Support Group requests that you please submit any comments you have on this Wiki article to the "Comments" area below. THANK YOU!
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Wiki Page: 02w. "Thermal Transient Analysis" (TTA) - AutoPIPE Load Case
Applies To Product(s): AutoPIPE, Version(s): 2004, XM, & V8i Environment: N/A Area: load case Subarea: Original Author: Bentley Technical Support Group Comments, Questions, and Answers about AutoPIPE TTA Analysis: Item #1: What steps are required to perform a Thermal Transient Analysis (TTA) in AutoPIPE? Item #2: When AutoPIPE calculated the gradient does it uses TTA Pipe & Insulation at room temperature? Item #3: Would you please explain to me what is the difference between ambient and room temperature? Item #4: What is the correct ambient temp for use with TTA analysis in AutoPIPE? Item #5: How good are the results from TTA? Item #6: Is the through wall gradient analysis output (delta T1, delta T2, Ta and Tb) automatically accounted for in the flange design in AUTOPIPE? See Also Bentley AutoPIPE External Links Bentley Technical Support KnowledgeBase Bentley LEARN Server Comments or Corrections? Bentley's Technical Support Group requests that you please submit any comments you have on this Wiki article to the "Comments" area below. THANK YOU!
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Wiki Page: 02u. "Fluid Transient" - AutoPIPE Load Case
Applies To Product(s): AutoPIPE, Version(s): 2004, XM, & V8i Environment: N/A Area: Subarea: Original Author: Bentley Technical Support Group Comments, Questions, and Answers related to AutoPIPE's "Fluid Transient" Dialog screen Pressing OK button closes the dialog and the following report is displayed about the transient. This file is saved in the same folder as the model (example: W1.THL): In addition, the fluid transient utility automatically creates the relevant force-time histories (*.TIH) and can handle either a positive or negative shock wave at each point listed int he *.THL file, see example below (W1C01N.TIH): Note: 1. TIH files are always in English units regardless of the Model units file specified on the General Options dialog screen. To see the unit conversion factor used, open the respective Units file (ex. SI.UNT) in any text editor (i.e. Notepad), and locate "Force" in the right column, read to the left for the factor conversion value to English units. See the following WIKI here for more details. 2. There is a complete Fluid transient (Water Hammer) tutorial and model example with complete details on the calculations performed by the program, etc.., please see the following AutoPIPE help section for details: Help > Contents> Contents Tab> Modeling Approaches> Water Hammer (Time History) Example. See the following WIKI page that address questions about this particular example. Q1. How do I accommodate 240 secs into the assessment. When the dialogue box in AutoPIPE for fluid transient loads is opened, the rise time is described as typically, the valve open/closure time. So can you confirm that me entering 240 seconds in this field is correct? Answer: click here Q2. What I notice in running a fluid transient analysis, as described in the Example tutorial mentioned above, that extending the rise time, these loads / displacements are reduced, however, the surge pressure remains constant. I assume that for pressure rise alone, AutoPIPE does not account for the slow valve closure. BUT, for pipe displacements / loads at anchors bends etc. AutoPIPE does account for this slow closure time?? This is fundamental in my analysis so need to be sure I am on the right track . I see extending the time on this rise input massively reduces forces, but the pressure is the same, please confirm. Answer: click here Q3. Is it possible to perform a time history analysis on imposed support displacement movements in AutoPIPE? Answer: Click Here See Also Bentley AutoPIPE External Links Bentley Technical Support KnowledgeBase Bentley LEARN Server Comments or Corrections? Bentley's Technical Support Group requests that you please submit any comments you have on this Wiki article to the "Comments" area below. THANK YOU!
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Wiki Page: Loads and Load Sets - AutoPIPE
Applies To Product(s): AutoPIPE, Version(s): 2004, XM, & V8i Environment: N/A Area: Loads Subarea: Original Author: Bentley Technical Support Group Comments, Questions, and Answers About Loads and Load Sets in AutoPIPE Animate load cases AutoPIPE Menu - Load> Load Case Descriptions Static Analysis Sets... Dynamic Analysis Load Factors Hydrotest Static Earthquake... Wind Snow Thermal Bowing Seismic Thermal Load Response / Force Spectrum C411 Spectrum Envelope Spectrum Harmonic Time History Profile Time History Location Convert to Force Spectrum Convert to Response Spectrum Buoyancy Wave Fluid Transient Steam Relief Thermal Transient Analysis (TTA) Load cases not listed above: Gravity Pressure Temperature Sam (Seismic Anchor Movement) Results From Loads and Load Sets Not Answered By Piping Code Calculations Code / Non-code Combination (Tools> Combinations dialog) Non-linear Load Sequencing How to determine fatigue from pressure cycles? Answer : Apologize for the inconvenience, this feature is not currently in AutoPIPE. This enhancement has been logged under (CAE-CR-3268). However, only AutoPIPE Vessel has ability to determine fatigue from pressure cycling at this time. Soil Properties FAQ See Also Bentley AutoPIPE External Links Bentley Technical Support KnowledgeBase Bentley LEARN Server Comments or Corrections? Bentley's Technical Support Group requests that you please submit any comments you have on this Wiki article to the "Comments" area below. THANK YOU!
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Wiki Page: 03d. "Sam" (Seismic Anchor Analysis) - AutoPIPE load case
Applies To Product(s): AutoPIPE, Version(s): 2004, XM, & V8i Environment: N/A Area: Subarea: Original Author: Bentley Technical Support Group Dec 2014, AutoPIPE 09.06.01.10 Comments, Questions, and Answers: Item #1: How do I know SAM displacements are in phase or out of phase? Answer: Please refer to SAM help documentation & wiki pages for more information on SAM analysis support groups and combination methods. Please consider a dynamic analysis if the phase of the analysis results is of interest. Item #2: What is the difference between AutoPIPE and ADL Pipe in SAM analysis? Answer: In AutoPIPE Powered by ADLPIPE, the program uses Absolute Sum for combinations on SAM cases. However, in ADL Pipe, uses Algebraic Summation for SAM results See Also Bentley AutoPIPE External Links Bentley Technical Support KnowledgeBase Bentley LEARN Server Comments or Corrections? Bentley's Technical Support Group requests that you please submit any comments you have on this Wiki article to the "Comments" area below. THANK YOU!
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Wiki Page: Flange Analysis - AutoPIPE
Applies To Product(s): AutoPIPE, Version(s): 2004, XM, & V8i Environment: N/A Area: analysis Subarea: Original Author: Bentley Technical Support Group Note: 1. See Flange Analysis Trouble shooting tips and tricks in AutoPIPE 2. See the following link for logged enhancements: Flange Analysis Enhancements for AutoPIPE Comments, Questions, and Answers Item #1: How to perform an ANSI Check Flange Analysis with AutoPIPE Item #2: How do I perform an ASME Section VIII Div 1 / 2 or Appendix XI Flange Analysis in AutoPIPE? Item #3: On the Load tab, Operating Pressure field is limited to 3000 psi. Why? Item #4: Does the flange analysis in AutoPIPE determine expected leakage rates? Item #5: What load case combinations are added to the Flange Analysis dialog? what is the selection criteria ? Item #6: Flange data does not seem to be correct is it? Item #7: Even with "zero loads and moments"; still AutoPIPE's Flange analysis results says the connection fails, why? Warning messages: 1. The Gasket Material [SPIRAL-WOUND ALLOY WITH MINERAL FIBER FILL] is not available in the GasketMaterials Table. 2. The required information is missing for this AutoPIPE flange analysis See Also Bentley AutoPIPE External Links Bentley Technical Support KnowledgeBase Bentley LEARN Server Comments or Corrections? Bentley's Technical Support Group requests that you please submit any comments you have on this Wiki article to the "Comments" area below. THANK YOU!
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Wiki Page: 07. Even with "zero loads and moments"; still AutoPIPE's Flange analysis results says the connection fails, why?
Applies To Product(s): AutoPIPE, Version(s): 2004, XM, & V8i Environment: N/A Area: Flange analysis Subarea: Original Author: Bentley Technical Support Group Dec 2014, AutoPIPE V8i 09.06.01.10 Problem: Even with "zero loads and moments"; still AutoPIPE's Flange analysis results says the connection fails, if this were true it would not be possible to create a connection with these characteristics, which contradicts the reality because it is based on a specification of their client which has been widely used for different services and for many years. Why is the results failing? Answer: Open the Flange report (*.FLR can be opened by any text editor, i.e. NotePad, Ultra Edit,etc..) and scroll down to the location where the flange is failing, asterisk next to values, example: The flange is not failing but it is the Gasket seating condition that is failing. In all cases it's the stresses at the gasket that are failing during the Longitudinal Hub Stress calculation. The allowable is only 30.000 ksi and the gasket stress were calculated by code equations to be 33.700 ksi. AutoPIPE is performing the code calculations mentioned in ASME III Appendix XI - 2010 correctly. In conclusion, this flange with these settings does not pass and requires changes in order to satisfy the code Gasket Seating Condition for Longitudinal Hub Stress. See Also Bentley AutoPIPE External Links Bentley Technical Support KnowledgeBase Bentley LEARN Server Comments or Corrections? Bentley's Technical Support Group requests that you please submit any comments you have on this Wiki article to the "Comments" area below. THANK YOU!
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Wiki Page: 06. How to model a Trunnion welded structural pipe support in AutoPIPE?
Applies To Product(s): AutoPIPE, Version(s): 2004, XM, & V8i Environment: N/A Area: modeling Subarea: Original Author: Bentley Technical Support Group Dec 2014, AutoPIPE V8 09.06.01.10 Problem: How to model a Trunnion pipe support in AutoPIPE? Answer: There a couple different methods to model a Trunnion pipe support in AutoPIPE. Consider using one or a derivation of the following methods: Option #1: Please see the following AutoPIPE help section: Help > Contents> Contents Tab> Modeling Approaches> Modeling Approaches> Support> Model 2: Trunnion Support Option #2: Model a rigid Beam that does not include weight from the center of the pipe to the outside surface of the pipe. From this point, add another beam with specific section properties to the actual support location (i.e. anchor component or another beam that is part of a structural support system built in the model). Option #3: Similar to the Option #2 above, but with Piping components. a. Insert a Tee component at the node point, Tee type = Other, SIF in/ out = 1.00. b. On the Tee Branch insert a run of pipe to the outside surface of the main pipe run c. Select this short run of Pipe, Insert> Rigid options over range> : Include Weight = unchecked (OFF) Include Thermal Expansion = checked (ON) Wire frame View below: d. From the node point located on the surface of the pipe, insert User SIF value representing the welded connection and insert a pipe run, using updated pipe properties, to the actual support location (i.e. anchor component or another beam that is part of a structural support system built in the model). e. At the pipe surface interface where the trunnion is connected to the pipe insert a Reference Point: AutoPIPE V8i 09.06.01.xx and lower: Insert> Xtra Data> Reference Point> with "Report Reference Points results to AutoPIPE Nozzle/AutoPIPE Vessel" option checked ON. With AutoPIPE Advanced or Nuclear edition, using File> Export> Nozzle Loads to AutoPIPE Nozzle> evaluate stresses of trunnion on pipe. See Also Bentley AutoPIPE External Links Bentley Technical Support KnowledgeBase Bentley LEARN Server Comments or Corrections? Bentley's Technical Support Group requests that you please submit any comments you have on this Wiki article to the "Comments" area below. THANK YOU!
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Wiki Page: 06. How to model pendulum swing of a pipe on a rod support in AutoPIPE?
Applies To Product(s): AutoPIPE, Version(s): 2004, XM, & V8i Environment: N/A Area: Modeling Subarea: Original Author: Bentley Technical Support Group Problem: How to model pendulum swing of a pipe on a rod support in AutoPIPE? Answer: Description: Rod Hanger Pendulum or Angulation Modeling Product: AutoPIPE Version number: V8i (v9.1) Submitted by: MU Theory Also called hanger angular deviation in programs like ROHR 2 described as below Consider angular deviation Restoring forces on account of skewing as well as the movement of the support node on a circular arc are considered. In addition to the transverse movement, there is a movement in direction of the hanger’s anchor in the original hanger direction. To consider the angular deviation, the hanger length must be entered. The angular deviation is only considered for calculations with non-linear boundary conditions. Proposed angulation deviation applied as a restoring force and vertical displacement calculated during the non-linear analysis only at the hanger rod node location. Modeling Example Model: Pendulum1.dat (With large exaggerated seismic movements) Segment A – no pendulum effect, Segment B with pendulum effect Examine pendulum effect at Point A10 and assume Hanger exaggerate B – with pendulum effect for extreme unrealistic angulation Calculated Vertical Displacement and Wf-Z horizontal restoring forces for each primary Insert applied support displacement and concentrated forces for Gr, T1, E1, and W1 at B10 Thermal T1 Fy = -1970 ;bf is an additional reaction on the Rod hanger due to the upward arcing moment of the 0.3077" of the Rod Hanger. After applying these restoring forces and imposed displacements, calculate the new displacements for angle Theta. If the new angle is quite different, you may want to repeat the procedure using the new updated angle Theta. In many cases you may not need to iterate. One recommendation, if displacements change by e.g. 50% then iterate. In the example above there is only a maximum 3% change in the displacements, thus no iteration in necessary. There is negligible change (0.25%) in the thermal stresses which has the pendulum effect. Even with large unrestrained seismic movement only 2.1% change in Occasional Stress. Select the following link to download the Excel data sheet and AutoPIPE model used in the example https://communities.bentley.com/products/pipe_stress_analysis/m/pipe_stress_analysis_gallery/269648.aspx See Also Bentley AutoPIPE External Links Bentley Technical Support KnowledgeBase Bentley LEARN Server Comments or Corrections? Bentley's Technical Support Group requests that you please submit any comments you have on this Wiki article to the "Comments" area below. THANK YOU!
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Wiki Page: 04. General FAQ's about Supports and Beams in AutoPIPE
Applies To Product(s): AutoPIPE, Version(s): 2004, XM, & V8i Environment: N/A Area: Modeling Subarea: Original Author: Bentley Technical Support Group Dec 2014, AutoPIPE V8i 09.06.01.10 Item #1: Support type that are not active for static seismic and dynamic load cases Item #2: Caesar guide support compared to AutoPIPE guide supports Answer: A guide support in AutoPIPE is different than Caesar's guide element - it's equal to Caesar's 2 supports (guide and Y stop). In AutoPIPE, a guide supports the pipe in the vertical and lateral directions but not axial. You can input gaps to remove vertical support or other directions if required. A guide support in AutoPIPE is always normal to the local pipe axis, so if the pipe is rotated the guide stays normal to the pipe which is very useful also when guides on skewed pipe. NOTE: Large gap will not display the support symbol in that direction for convenience. Item #3: Tips and Tricks when working on Combined Beam Structural & Piping models Item #4: Define a Displacement at a Support Item #5: Where should I use Flexible anchor / rigid anchor Item #6: How to model pendulum swing of a pipe on a rod support in AutoPIPE? See Also Bentley AutoPIPE External Links Bentley Technical Support KnowledgeBase Bentley LEARN Server Comments or Corrections? Bentley's Technical Support Group requests that you please submit any comments you have on this Wiki article to the "Comments" area below. THANK YOU!
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Wiki Page: 01. Beam Properties dialog in AutoPIPE does not always automatically update , why?
Applies To Product(s): AutoPIPE, Version(s): 2004, XM, & V8i Environment: N/A Area: Modeling Subarea: Original Author: Bentley Technical Support Group Problem: When entering Beam Section Properties, the dialog will automatically calculate the "Section Properties" for Shapes = Pipe or Solid pipe based on "Section Dimensions" entered, but will not do that for any other shape selected. Why? Answer: Pipe is a round geometrical shape that is easy to calculate the area for solid circle or hollow circle shape and thus section properties. However other Beam shapes (i.e. M-shape, Channel, Tube, etc..) are more complex shapes with to many unknowns (i.e inside radius, chamfers, etc..) to easily calculate the area and thus section properties. Therefore, only Solid pipe and Pipe shape have their section properties automatically calculated. All other shapes the user must enter in user defined values. See Also Bentley AutoPIPE External Links Bentley Technical Support KnowledgeBase Bentley LEARN Server Comments or Corrections? Bentley's Technical Support Group requests that you please submit any comments you have on this Wiki article to the "Comments" area below. THANK YOU!
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Wiki Page: _A. Specific questions related to "Beam Properties" Dialog in AutoPIPE
Applies To Product(s): AutoPIPE, Version(s): 2004, XM, & V8i Environment: N/A Area: Modeling Subarea: Original Author: Bentley Technical Support Group Comments, Questions, and Answers about Beam Properties dialog screen Item #1: Beam Properties dialog in AutoPIPE does not always automatically update , why? See Also Bentley AutoPIPE External Links Bentley Technical Support KnowledgeBase Bentley LEARN Server Comments or Corrections? Bentley's Technical Support Group requests that you please submit any comments you have on this Wiki article to the "Comments" area below. THANK YOU! https://communities.bentley.com/products/pipe_stress_analysis/w/pipe_stress_analysis__wiki/18447.01-beam-properties-dialog-in-autopipe-does-not-always-automatically-update-why
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Wiki Page: Why does line stop ignore friction?
Applies To Product(s): AutoPIPE, Version(s): 2004, XM, & V8i Environment: N/A Area: Modeling Subarea: Original Author: Bentley Technical Support Group Dec 2014, AutoPIPE V8i 09.06.01.10 Problem: Would like to know the explanation about the line stop ignoring friction. In my opinion, this is not feasible especially when the line stops are placed nearby the nozzles. Moreover, high temperature lines usually have high line stop loads to produce high frictional forces in the other 2 directions. These are being ignored by AutoPipe. Answer: Based on typical construction practice, a line stop is usually a lug or some sort of pipe attachment rigidly mounted that moves with the pipe in the axial direction. Most line stops have a predetermine gap for axial movement. When the pipe's axial movement is such that the gap closes, typically the Lug / attachment has come into contact with something (i..e concrete block, beam structure, etc..) that it prevents the pipeline from freely moving. This type of support is called a Line Stop A Line stop has no friction involved as the lug / attachment is rigidly mounted to the pipe where it freely moves with the pipe. Also a pipe is not supported by a line stop, so there is no bearing force on a line stop support. The only contact for a Line stop is when the gap closes and it is resting against the anchor object. See Also Bentley AutoPIPE External Links Bentley Technical Support KnowledgeBase Bentley LEARN Server Comments or Corrections? Bentley's Technical Support Group requests that you please submit any comments you have on this Wiki article to the "Comments" area below. THANK YOU!
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Wiki Page: 02. Why does an AutoPIPE Line stop support ignore friction?
Applies To Product(s): AutoPIPE, Version(s): 2004, XM, & V8i Environment: N/A Area: Modeling Subarea: Original Author: Bentley Technical Support Group Dec 2014, AutoPIPE V8i 09.06.01.10 Problem: Would like to know the explanation about the line stop ignoring friction. In my opinion, this is not feasible especially when the line stops are placed nearby the nozzles. Moreover, high temperature lines usually have high line stop loads to produce high frictional forces in the other 2 directions. These are being ignored by AutoPipe. Answer: Based on typical construction practice, a line stop is usually a lug or some sort of pipe attachment rigidly mounted that moves with the pipe in the axial direction. Most line stops have a predetermine gap for axial movement. When the pipe's axial movement is such that the gap closes, typically the Lug / attachment has come into contact with something (i..e concrete block, beam structure, etc..) that it prevents the pipeline from freely moving. This type of support is called a Line Stop A Line stop has no friction involved as the lug / attachment is rigidly mounted to the pipe where it freely moves with the pipe. Also a pipe is not supported by a line stop, so there is no bearing force on a line stop support. The only contact for a Line stop is when the gap closes and it is resting against the anchor object. See Also Bentley AutoPIPE External Links Bentley Technical Support KnowledgeBase Bentley LEARN Server Comments or Corrections? Bentley's Technical Support Group requests that you please submit any comments you have on this Wiki article to the "Comments" area below. THANK YOU!
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Wiki Page: e. Line Stop - Support Type in AutoPIPE - FAQ's
Applies To Product(s): AutoPIPE, Version(s): 2004, XM, & V8i Environment: N/A Area: Modeling Subarea: Original Author: Bentley Technical Support Group Dec 2014, AutoPIPE V8i 09.06.01.10 Comments, Questions, and Answers about AutoPIPE's Line Stop Support Type: Item #1: Questions about Line Stop dialog screen: Item #2: Why does an AutoPIPE Line stop support ignore friction? See Also Bentley AutoPIPE External Links Bentley Technical Support KnowledgeBase Bentley LEARN Server Comments or Corrections? Bentley's Technical Support Group requests that you please submit any comments you have on this Wiki article to the "Comments" area below. THANK YOU!
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Wiki Page: a. Spring - Support Type in AutoPIPE - FAQ's
Applies To Product(s): AutoPIPE, Version(s): 2004, XM, & V8i Environment: N/A Area: Modeling Subarea: Original Author: Bentley Technical Support Group Dec 2014, AutoPIPE V8i 09.06.01.10 Comments, Questions, and Answers about AutoPIPE's Line Stop Support Type: Item #1: Questions about Spring Support Dialog screen Item #2: How to define horizontal spring in AutoPIPE See Also Bentley AutoPIPE External Links Bentley Technical Support KnowledgeBase Bentley LEARN Server Comments or Corrections? Bentley's Technical Support Group requests that you please submit any comments you have on this Wiki article to the "Comments" area below. THANK YOU!
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Wiki Page: 02. How to define horizontal spring in AutoPIPE?
Applies To Product(s): AutoPIPE, Version(s): 2004, XM, & V8i Environment: N/A Area: Modeling Subarea: Original Author: Bentley Technical Support Group Dec 2014, AutoPIPE V8i 09.06.01.10 Problem: How to define horizontal spring in AutoPIPE, that is to be added in horizontal direction, to apply the loading necessary to reduce some unwanted displacements. Also the question is how to define/calculate preload (factory setting) in cold conditions, and get final loading in hot conditions... Answer: With of AutoPIPE V8i 09.06.00.19 and lower, according to the online help a spring bearing direction is Vertical only. Therefore a horizontal spring cannot be modeled. A new enhancement has been logged, CAE-CR- 10654: Enable spring support bearing direction to be user-specified. This will be added to a future version of the program. Workaround: None. See Also Bentley AutoPIPE External Links Bentley Technical Support KnowledgeBase Bentley LEARN Server Comments or Corrections? Bentley's Technical Support Group requests that you please submit any comments you have on this Wiki article to the "Comments" area below. THANK YOU!
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Wiki Page: c. V-stop - Support Type in AutoPIPE - FAQ's
Applies To Product(s): AutoPIPE, Version(s): 2004, XM, & V8i Environment: N/A Area: Modeling Subarea: Original Author: Bentley Technical Support Group Dec 2014, AutoPIPE V8i 09.06.01.10 Comments, Questions, and Answers about AutoPIPE's Line Stop Support Type: Item #1: Questions about V-stop support dialog screen Item #2: Do we have any control to adjust V-Stop support stiffness (or) always it takes (default) rigid value. Answer: No, an AutoPIPE V-stop has rigid stiffness setting. If you wish to consider a V-stop with support stiffness, select Support type = Incline. See Also Bentley AutoPIPE External Links Bentley Technical Support KnowledgeBase Bentley LEARN Server Comments or Corrections? Bentley's Technical Support Group requests that you please submit any comments you have on this Wiki article to the "Comments" area below. THANK YOU!
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