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Time varying load in transient PDE

Posted 2010年1月6日 GMT-5 20:21 2 Replies

Rakesh Dhote
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Hi Everybody,

I would like to use the sinusoidal time varying load: sin(pi*t/6) in the simulation for transient PDE.
How to use the time in defining the load?

Thanks in advance.
Rakesh
2 Replies Last Post 2010年1月7日 GMT-5 19:27
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago 2010年1月7日 GMT-5 00:44
Hi

normally for a transient you set up your load as F=F0*sin(2*pi*f), but mostly when you work with sinus load you shoul use the harmonic mode, where one uses the Fourier space
Good luck
Ivar
Hi normally for a transient you set up your load as F=F0*sin(2*pi*f), but mostly when you work with sinus load you shoul use the harmonic mode, where one uses the Fourier space Good luck Ivar
Rakesh Dhote
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Posted: 1 decade ago 2010年1月7日 GMT-5 19:27
Ivar,

I am using PDE general form to model the system. How to use the harmonic mode in general form?
Is there any way to use the solution time 't' in the equation ?

Thanks,
Rakesh
Ivar, I am using PDE general form to model the system. How to use the harmonic mode in general form? Is there any way to use the solution time 't' in the equation ? Thanks, Rakesh

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