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[solved]using displacement of a point as a variable

Posted Oct 31, 2017, 12:19 p.m. EDT Structural Mechanics 1 Reply

Guanglu Fan
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Hi,

I am solving a time-dependent study and I would like to use the instant displacement of a point as a variable for electric potential. I know that the displacement along x,y,z is u,v,w. But I only need one point. How can I achieve this? ( I tried to define a point and use "point.u" but does not work)

1 Reply Last Post Nov 1, 2017, 9:28 a.m. EDT
Jeff Hiller COMSOL Employee

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Posted: 7 years ago Nov 1, 2017, 9:28 a.m. EDT
Updated: 7 years ago Nov 1, 2017, 10:37 a.m. EDT

Hello Guanglu,

You can use a component coupling of the integration type for this. This is because integrating a continuous field at one point is the same as picking its value at that point. I am attaching a toy model where an integration component coupling is used to link the voltage on a boundary to the displacement at one point.

Best,

Jeff

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Jeff Hiller
Hello Guanglu, You can use a component coupling of the integration type for this. This is because integrating a continuous field at one point is the same as picking its value at that point. I am attaching a toy model where an integration component coupling is used to link the voltage on a boundary to the displacement at one point. Best, Jeff

Attachments:

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