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rigid connector
Posted 05.12.2013, 14:26 GMT-5 Structural Mechanics Version 4.3b 1 Reply
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Dear colleagues,
I need to constrain the center of rotation of a rigid connector with a spring.
Is there the possibility to do that?
It might be easy to do if I could use an existing point as the center of rotation, but I do not know how to do it.
Thanks for any suggestions
Simone
I need to constrain the center of rotation of a rigid connector with a spring.
Is there the possibility to do that?
It might be easy to do if I could use an existing point as the center of rotation, but I do not know how to do it.
Thanks for any suggestions
Simone
1 Reply Last Post 05.12.2013, 14:56 GMT-5
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Posted:
1 decade ago
Hi,
Here is a way to do it for a simple linear spring:
1. Figure out the name of the rigid connector degree of freedom you are interested in, e.g solid.rig1.v for a y-displacement in the rigid connector with tag 'rig1'
2. Show Advanced Physics Options
3. Add Solid Mechanics->Global->Weak Contribution
4 Enter the contribution as " -k*solid.rig1.v*test(solid.rig1.v)" where k is the spring constant.
This can fairly easy be extended to a spring which changes direction with deformation etc.
Here is another quicker variant, with a little less generality:
1. Add an Applied force to the rigid connector
2. In the y-component of the force, write "-k*solid.rig1.v"
Regards,
Henrik
Here is a way to do it for a simple linear spring:
1. Figure out the name of the rigid connector degree of freedom you are interested in, e.g solid.rig1.v for a y-displacement in the rigid connector with tag 'rig1'
2. Show Advanced Physics Options
3. Add Solid Mechanics->Global->Weak Contribution
4 Enter the contribution as " -k*solid.rig1.v*test(solid.rig1.v)" where k is the spring constant.
This can fairly easy be extended to a spring which changes direction with deformation etc.
Here is another quicker variant, with a little less generality:
1. Add an Applied force to the rigid connector
2. In the y-component of the force, write "-k*solid.rig1.v"
Regards,
Henrik