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Found 2 results

1. RFORCE - acceleration

Hello, I have a problem with a linear static analysis with Optistruct; I have to evaluate shear tension on a rotating cylinder with angular acceleration. I've completed the tutorial on the rotating disc; I've also add angular acceleration in RACC field of RFORCE and results are in accordance with analytical formulas. My problem consist in the evaluation of stress in a rotating cylinder (without the central hole) with angular acceleration. I have no problem if RACC =0 and non-zero angular velocity; however, when I add angular acceleration, resultant displacements are very high and stress very low. Did I commit any errors in constraints definition? I constrained DOF 1 2 3 of nodes belonging to the axis of the cylinder. Thank you so much for your attention rotating.fem
2. How to define "RForce" Load?

Hi all, I am working on a helicopter blade model. I want to check the effects of centrifugal force on the rotor blade.. I referred to the RForce load card in hypermesh help.. I could not understand the fields required to define the load.. http://www.altairhyperworks.com/hwhelp/Altair/2017/help/hwsolvers/hwsolvers.htm?rforce.htm - Hypermesh help page I have attached a screenshot of my question here.. How to create Rotation axis and define the rectangular components of rotation vector?
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