what is the dof of CBUSH elements?
Altair Employeewhat is the dof for CBUSH elements? If i want to create a pin joint ain which i want to constraint all dof except one rotation..what dof i must select while creating zero length CBUSH element among 1-6 dof??
Answers
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CBUSH is a generalized spring-damper structural element with can take up to 6 stiffness values.If there are more than one stiffness we need to assign a local coordinate system id.
What exactly you want to capture with zero length Bush element?I have attached some documents from user guide for your reference.
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Altair Forum User said:
CBUSH is a generalized spring-damper structural element with can take up to 6 stiffness values.If there are more than one stiffness we need to assign a local coordinate system id.
What exactly you want to capture with zero length Bush element?I have attached some documents from user guide for your reference.
Dear Rahul, the files you had attached are no longer visible. Could you please re-attach them? Thank you very much,
Pietro
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CBUSH elements can be referenced in a local coordinate system (CID)m so that all the DOFs for its stiffness are defined in this system.
The stiffness values are defined inside its property, the PBUSH card.
So inside the PBUSH there's K1, K2, ...K6 defining stiffnesses for each DOF of your CBUSH element (according to the system).
For a pin, you need to release the rotational DOF desired, by defining a zero or very small stiffness at this particular DOF.
Take a look at the OptiStruct documentation, searching for CBUSH and PBUSH.
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