Applies To Product(s): AutoPIPE, Version(s): 2004, XM, & V8i Environment: N/A Area: Subarea: Original Author: Bentley Technical Support Group Dec 2014, AutoPIPE V8i 09.06.01.10 Problem: To summarize, I have a gravity case, a thermal case, and a user case. My gravity case, for example, shows a -1224 pound force acting on my v-stop (compression only) support. Both my thermal and my user case actually cause the valve that is being supported to lift up. If I look at the Thermal case, I observe a "fake" reaction load of +1224 pounds at the v-stop. I understand the purpose of this is so that when Gravity + Thermal are actually added together, the net reaction force is 0 pounds. The same situation occurs with my User case (a fake reaction load of +1000 pounds). The problem that results from this is when I combine Gravity + Thermal + User 1. Th e resulting reaction force at the v-stop is a +1000 pound force. Thus, this turns my compression only support into a tension support as well, but only up to the magnitude of the gravity reaction. I don't foresee this drastically changing my analysis, but it does present inaccurate loading in my supporting frame. Answer: T here is no indication if this model is being run as a Linear analysis or Non-Linear analysis. Assuming non-Linear analysis as the pipe is clearly moving off the support, suggest that you modify the "Initial case for Occ. loads" from Gr to OP1...OPn. Under Load> Static Analysis results> See column labled "Initial State Occasional", set this value to OP1 - OPn (select a value other than GR). Re-run your analysis and review your results. See AutoPIPE Help for details on this command. 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! Initial case for Occ. loads
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