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Can anyone explain me the DOF assignment in Hyper mesh v2025

Raghu_Bhat_1411

I have an example of an axle bar. According to the vehicle coordinate system, the axle bar undergoes translation and rotation in the Y‑direction. When I apply a boundary condition at one end, I am uncertain about how to select the appropriate degrees of freedom (DOFs). Specifically, I want to clarify: if a DOF is ticked in HyperMesh, does that mean it is arrested, or is it arrested when the DOF is left unticked?

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Accepted answers

Jason_Craanen

When you check the dof, you are locking that dof. Unchecked is free. So in the below example, translation is locked and rotation is free

All comments

Jason_Craanen

When you check the dof, you are locking that dof. Unchecked is free. So in the below example, translation is locked and rotation is free

Raghu_Bhat_1411

Does this concept same for all kind of Elements in Hypermesh? or This concept will vary based on Elements like Kinematic coupling or Even Boundary Condition etc?

Jason_Craanen

It would be dependent on the entity and solver. For example for an Optistruct pin flag on a bar element checking it on allows the dof movement

Jason_Craanen

Best way to know is to output the deck and verify it against the documentation for that entity

Raghu_Bhat_1411

OK. Thank you very much Jason