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Found 1 result

  1. Hello Optistruct users, I am attempting to run a topology optimization using dequations as a force constraint. I would like to obtain the reaction forces on a bolt (represented as a CBUSH) and calculate the shear forces on the bolt. The shear forces will be calculated using dequations since we can only obtain reaction forces in DOF 1-6 and shear is needed from both DOF 2 and 3 (in this case). I would then like to use the calculated reaction shear force as a constraint. My trouble is relating the reaction forces to the dequation. How do I reference these forces? I am assuming I will need to reference the node number as well. My other concern is relating the dequation to RESP2. When I try to create a response (using function as my response type) I get the response "a dequation must be selected and edited". I am not sure if this is due to my equation not having referenced any forces with my variables or not. Do I need to create my eqation in Hypermath? Being that the equation I need is already a built in funtion as rss I am thinking I do not need to use Hypermath. Also, if there is a better way to establish the same result I am open to suggestions. Thanks, LP
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