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Reference Point for Moment computation
Posted Jul 1, 2013, 12:48 p.m. EDT Structural Mechanics Version 4.3, Version 4.3a 1 Reply
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Hello,
I am using the 2D beam module in order to model 2 structures A and B and to couple them together through 2 springs. The springs have stiffness in the x and y directions, but also a rotational stiffness. I couple the 2 structures by adding a point load at the contact points and the force can look like to following:
kx*(ca2x-cb2x)
ky*(ca2y-cb2y)
mz*(ca2m-cb2m)
where ca2m and cb2m is the rotation at the contact point.
How can I know if the rotation is computed locally or globally? Indeed mz*(ca2m-cb2m) is a moment, and according to the documentation, the moment is calcuted globally with respect to a reference point.
Thank you in advance for your support.
regards,
I am using the 2D beam module in order to model 2 structures A and B and to couple them together through 2 springs. The springs have stiffness in the x and y directions, but also a rotational stiffness. I couple the 2 structures by adding a point load at the contact points and the force can look like to following:
kx*(ca2x-cb2x)
ky*(ca2y-cb2y)
mz*(ca2m-cb2m)
where ca2m and cb2m is the rotation at the contact point.
How can I know if the rotation is computed locally or globally? Indeed mz*(ca2m-cb2m) is a moment, and according to the documentation, the moment is calcuted globally with respect to a reference point.
Thank you in advance for your support.
regards,
1 Reply Last Post Jul 3, 2013, 3:46 a.m. EDT
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Posted:
1 decade ago
Hi,
The 'Reference point for Moment computation' is only used for output of applied loads or reaction forces during postprocessing. It will not affect any expressions that you create.
Regards,
Henrik
The 'Reference point for Moment computation' is only used for output of applied loads or reaction forces during postprocessing. It will not affect any expressions that you create.
Regards,
Henrik