How to perform Eigenfrequency study with temperature varied from rubbery state to glassy state in COMSOL?

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Dear All,

I have conducted a prestressed eigenfrequency study on a structure using two steps:
1. Step 1: A stationary analysis with thermal expansion (+15°C) and tensile load.
2. Step 2: An eigenfrequency analysis using the results of Step 1 as the initial conditions.

In this study, the eigenfrequency values are determined under the conditions of the structure being heated and subjected to load.

Now, I would like to perform an eigenfrequency analysis at a cooled temperature, i.e., at room temperature, while considering the deformed shape and residual stress from the heated state (not the initial state prior to heating and loading). My goal is to simulate the behavior of the structure in the context of Shape Memory Polymers (SMP) processes.

Does anyone have experience dealing with this type of analysis? Your assistance would be greatly appreciated.

Thank you very much for your help!

Prestressed eigenfrequency study is described here: https://www.comsol.com/forum/thread/342041/how-to-use-stress-and-displacement-results-from-1st-stationary-simulation-as-ini


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