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Found 2 results

  1. Hello, i am performing a topographie optimization of a hat-shaped beam unter 3-point-bending with HyperMesh and Optistruct. My aime is to minimize the compliance beneath a certain value (objective minimize compliance, constraint compliance < 14000), without exceeding a certain mass (constraint m < 0,000553) In the optimization controls i have limited the maximum number of iterations to 100 and the convergenze criterion to 0,000001. When i start the optimization, optistruct only performs the inital analysis and one optimization-iteration. The compliance of this one and only optimization-iteration is lower then the inital compliance but higher then the desired compliance. Why does optistruct dont perform additional iterations? Thank you very much for your help! With kind regards Tim Winkler
  2. Hi Everyone, I'm running an optimisation with multiple load cases. The solution gets really close to converging (in the .OUT file) the first and second convergence criterion are met and just as its about to converge the solution diverges. It runs for the maximum number of iterations (80) before it stops. Is there any way to change how long the optimisation will for so that a solution is reached before the maximum number of iterations are reached? Or does it more than likely suggest my load cases are incorrect, or theres something wrong with my model? etc.
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