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001085
2019-12-10

[EN] FAQ 004279 | Is it possible to consider the static zero position in a time history analysis?

Question:
Is it possible to consider the static zero position in a time history analysis?

Answer:
Yes, it is possible to consider the static zero position in a time history analysis. To do this, you can use the "Stationary state" function (not available in the linear modal analysis). 

This function allows you to read a condition from a load case or a load combination that exists over the entire time history. These include the deformations, stiffness modifications, and states of nonlinearities. 

This function can be activated in the RF‑/DYNAM Pro add-on module, in the "Calculation Parameters" tab of Dynamic Load Cases.

The time history diagram is well suited for result evaluation. In the attached example, Load Case 1 with the dead load was defined as a stationary state. In the time diagram, you can see that the deformations oscillate about the value that is reached by the static zero position.