Applies To Product(s): AutoPIPE, Version(s): ALL Environment: N/A Area: Modeling Original Author: Bentley Technical Support Group Problem: What does the following Tools> Model Options> Edit> "Include Bourdon rotational effect" do when enabled ? How is Bourdon effect implemented in AutoPIPE software? does it use the Flexibility Factors and Stress Intensification Factors provided by Codes? Solution: As mentioned in the online help: This option allows for the rotational effect at a bend due to pressure to be included in the pressure extension analysis cases (P1 to P100). When pressure is admitted to a bend, the bend tends to elongate and straighten. This is known as the "Bourdon" effect. The elongation effect is included in the pressure extension analysis cases (P1 to P100). Pressure extension analysis cases (P1 to P100) include the extension of both bends and straight pipes as well, but the Bourdon Rotational effect only applies to bends. Note: The inclusion of pressure extension analysis cases (P1 to P100) do not affect the structural stiffness matrix, and hence, has no affect on other static or dynamic analysis cases. Note: Pressure stiffening of bends, which tends to increase the stiffness of the bend and decrease the flexibility factor and SIF of the bend, can be applied with or without pressure extension analysis cases (P1 to P100). The two effects are completely independent. Furthermore, when "Include Bourdon rotational effect" check-box is checked ON it changes the stiffness matrix for bend elements. See Also Tools> Model Options> Edit settings Bentley AutoPIPE
↧