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duffing oscillator simulation

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Hello! I am trying to simulate the beam vibration which can be described by a van der Pol-Duffing equation (with nonlinear damping effects and nonlinear stiffness term ):

Can I directly add theese two through the body load subnode in the solid mechanical physics? Or is is possible to add it more accurately and efficiently?

I also see a blog(https://www.comsol.com/blogs/analyzing-forced-duffing-oscillations-in-metal-halide-lamps/)simulate the jump phenomenon through a Stationary-time dependent simulation, I would like to ask should I do a parametric sweep for a time dependent study and put the values of dependent variables-->the intial values of variables solved for -->solution of the last time?

Many thanks if anyone have any comments or suggestions. Xuecui


0 Replies Last Post 2021年9月9日 GMT-4 15:56
COMSOL Moderator

Hello Xuecui Zou

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