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Coupled, driven, spring-mass system
Posted 8 mar 2023, 16:33 GMT-5 Structural Mechanics 1 Reply
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I would like to model a coupled, driven, spring-mass system using Solid Mechanics in 2D. With two masses and one spring. Each mass has a different value. The first mass (m1) is to be driven sinusoidally. I plan to calculate the displacement as a function of time of the second mass (m2) as the result of this m1 being driven.
I have success in driving m1 with some sinusoidal motion. Also, connecting the spring using the spring-damper node also works.
This is where things go wrong. When m2>>m1, m2 is still displaced by the same amount as when m1>>m2. Why is this? Intuitively, I expect the m2 to barely be displaced if m1 and the driving force is comparatively small.
Thank you very much in advance!
Best regards, Andrew Hutcheson
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I had a brief look at this. I think you should try changing the time signal to a real signal, as sin(wt). You can also try more time steps, and then force these time steps to be followed (it is a settings somewhere down in the study nodes).
-------------------René Christensen, PhD
Acculution ApS
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