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natural frequency
Posted 2025年11月6日 GMT+8 15:52 2 Replies
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hi i am simulating a cylinder shape cavity to find the natural frequency. we did the experiment before in the laboratory but by simulating i can not get the exact result. i am wondering if i have applied the right boundary conditions to the model. the cavity put on the foam on the table during the experiment but in the simulation i have just drawn the cavity without foam underneath and applying fixed constraint boundary condition to the walls. what is the problem with my simulation and how can i get the exact result.
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It is not quite the same situation that you measure vs simulate. Perhaps start out by simulating with free conditions, just to see where you land. You can also add the foam in the simulation, perhaps via a spring condition or with explicit foam. Or fix the cylinder in the measurement.
-------------------René Christensen, PhD
Acculution ApS
www.acculution.com
info@acculution.com
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A fixed constraint is certainly not right, free is a better approximation to your experimental condition.
In 3D you will want to include a Rigid Motion Suppression node.
