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004279
2019-12-10

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.


Author

Ms. Effler is responsible for the development of products for dynamic analysis and provides technical support for our customers.