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Author Topic: What are Virtual Load Cases?  (Read 6037 times)

James

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What are Virtual Load Cases?
« on: January 03, 2018, 04:41:13 PM »
What are Virtual Load Cases? Couldn’t find any entries by searching the help.


BStier

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Re: What are Virtual Load Cases?
« Reply #1 on: January 04, 2018, 09:02:51 AM »
Virtual load cases are used in Express for deflection limit optimizations. They are required for the  adjoint solution. More detail on the theory can be found in 'Kyung K. Choi, Nam H. Kim: Structural Sensitivity Analysis and Optimization 1'. In most cases, the proper virtual load cases will be generated automatically (simply by defining a deflection limit).
In particular cases, users might want to manually create virtual load cases. Load cases flagged 'virtual' on import can be paired with 'actual' load cases in the stiffness deflection limit definition. Virtual load cases will NOT be accounted for in the strength sizing routine.