Response Dynamics > Response functions
Response function coordinate systems
When you generate elemental, peak, LCR, RMS, or CSD response functions, the coordinate system you select in which to display the results may conflict with the coordinate system the modal model uses. In the event that the coordinate systems are different, the results appear as shown in the following table.
Note:
Shell stress resultants use the same coordinate system as the modes.
| Element type | CSYS modes are stored in | CSYS selected for response function | CSYS used for response function |
|---|---|---|---|
| 3D | Nastran Basic (global/absolute CSYS) | Element | Global/Absolute |
| Material | Global/Absolute | ||
| Material | Element | Global/Absolute | |
| Material | Material | ||
| 2D or 1D | Element | Element | Element |
| Material | Element | ||
| Material | Element | Element | |
| Material | Material |
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Response function coordinate systems, Simcenter 3D 2021.1 Series
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Source: https://docs.sw.siemens.com/en-US/doc/289054037/PL20200601120302950.advanced/id631036 · retrieved 2026-07-17