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Periodic load using a defined function?

Posted 6 mai 2011, 05:56 UTC−4 Parameters, Variables, & Functions, Structural Mechanics Version 4.1 2 Replies

Yuriy Yanson
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Hi

I would like to solve a time dependent problem. For that I would like to define a periodic load on one of the boundaries in my geometry. My question is if it is possible to first define a function, e.g. "Model -> Definitions -> Functions ->Waveform -> Triangle" and then use this function as a time dependent load? I have tried to do that by first defining a waveform function called "wv1". But when I put "wv1" in the "Boundary Load", the line turns red and the solver gives me an error saying that it failed to evaluate variable wv1.

Thanks in advance,

Yuriy
2 Replies Last Post 30 mai 2016, 11:53 UTC−4
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago 6 mai 2011, 09:13 UTC−4
Hi

"ww1" is not a "variable", it's an "operator", you should use it as ww1(t[1/s]) the t[1/s] is to make the time "t" unitless as operators want unitless input

--
Good luck
Ivar
Hi "ww1" is not a "variable", it's an "operator", you should use it as ww1(t[1/s]) the t[1/s] is to make the time "t" unitless as operators want unitless input -- Good luck Ivar
Lu Lu
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Posted: 8 years ago 30 mai 2016, 11:53 UTC−4
thank you so much
thank you so much

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