I investigate the dynamic behavior of a shell model in Abaqus (see appendix "03" for schematic system setup), which is connected to a spring-damper system.
Abstract of the model:
- Modal analysis + SSD solver (steady state dynamics)
- Material model: Composite material layup (see appendix "04")
- Mesh: S4R shell elements
- Connector Assignment realized by stiffness and damping connection (see appendix "02")
- Excitation via primary base motion (displacement)
In the resonance range for the displacement of the nodes I get approximately the behavior (which occurs only for small stiffness values and shows a phase shift) shown in appendix "01".
For slightly higher stiffnesses in the connector, the nodes show a displacement about 20 times larger (without this phase shift shown in "01"), which seems physically unacceptable.
Does this point to a numerical problem that occurs at low stiffnesses in the connector?
How can the solution behavior of Abaqus be understood more precisely at this point?
After modal analyseAfterThereAfters, you can use direct steady-state analysis in Abaqus.
There are other steady-state analyses in Abaqus .it depending on whether your system is linear or not; You can use others
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