We have decided to try Ansys Workbench to perform a seismic Response Spectrum Analysis (RSA). In Ansys MAPDL, during calculation of equivalent stresses using RSA, we would normally include the SUMTYPE,PRIN command. The SUMTYPE,PRIN performs the RSA combination using the principal stresses...
I thought I would share this information since I struggled a bit with the ANSYS SUMTYPE command.
The SUMTYPE command is used when combining loadcases (LCOPER). It allows you to retain the signage of the stresses and nodal forces when performing SRSS operations. It can be used in a Response...
Hello,
I have performed a response spectrum analysis in an FE program. It's a cantilever structure, but the geometry is a quite complex. It is a solid model with a mixture of solid/shell/beam element types. OK, so maybe this problem deserves to go in the FE forum, but I think its a generic...
Why is ASTM A694 F65 not listed in the allowable stress tables of ASME II? As far as I know this is a standard material used for flanges.
I wanted to perform some calculations on a bolted flange connection. The material is specified as ASTM A694 F65. I was reluctant to use the alternative...
I am performing an assessment of a reel that is used to transport pipe. DNV Rules for Certification of lifting appliances states that the outward load on the flanges is one third of the radial load on the drum. This section of the code relates to winches. Is it still valid for pipe with say...
Hi,
I have four shell elements connected perpendicular to one another (in a cross). One face of the cross is subject to a bending load, the other is fixed at one end. A stress concentration is calculated at the interface. Is this a valid stress? It seems very high.
Any comments are welcome.
In DNV Part 1 Chapter 3, Design Loads, Section 3 Load and Load Effects, there is a definition of load categories.
It is stated that permanent loads include the weight of the structure.
It is also stated that environmental loads include the effect of waves.
If I know the acceleration acting on...
Is it still possible to perform an assessment to DNV using working stress design? I understand that the new code DNV-OS-C101 uses limit state design instead.
I am looking at lifting of a component. These are the factors that I have come up with:
Using the working stress design method:
- 1.2...
I seek advice whether bolt preload should be included as a primary stress when performing an assessment using the stress limits of ASME VIII Div 2 Appendix 4. Should bolt preload be included against the general primary membrane, and membrane plus bending stress limits of ASME 4-133 and 4-134...
