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Found 2 results

  1. Hi, I am a beginner about non linear simulation, I want simulate a contact about a gear transmission. In Altair tutorials I found this example:"OS-1520: Finite Sliding of Rack and Pinion Gear Model" that could help me. In the simulation, the motion is create by "enf_rotation" from a displacement of 5 radians. The load step hasn't Load declared and the rack is free to move on x. Now I have three questions: -What differece is between SPC and SPCD? If I used SPCD for "enf_rotation" would I get a different result? -Why there are contact stress in results? (There aren't forces or torque, the rack is free to slide) -If I want evalue the contact stress about a gear trasmition with a motion torque on pinion and a resistence torque on gear wheel, is this hypermesh's tutorial a good way? Altairguide-pignongear.pdf
  2. Hello, I am pretty new to Hyperworks but have worked myself through most of the tutorials. Until now, everything had pretty much worked out for me, but it’s the topology optimization, which is slowing me down at the moment. What I’m trying to do is to conduct two topology optimizations on a gear wheel, one where the wheel is driven by a moment in the center, and a second, where it is driven by a normal force on a tooth. The first had worked pretty well. I’ve reduced the gear wheel to only one tooth (virtually like a pie slice), set up a normal force on the flank and constrained the whole thing via a RBE3 and a CBAR element (6 DOFs). I then completely constrained every single node in a local system to simulate a symmetry constraint (which I’m not sure about being the right way of a symmetry constraint). Now I’m stuck with the second optimization. I want to add a second constraint, constraining the gear wheel at a second tooth, almost on the opposite side of the tooth with the normal force. The rotational DOF in the center shall be enabled. Is it possible to add a symmetry constraint for this problem? Or would there be another way to optimize the gear wheel? I hope I’ve explained it comprehensively enough. Thank you in advance for your help. Regards martonno
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