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Found 2 results

1. ## Discrepancy between FEM mass and mass during optimization

Greetings, I have a FEM model whose mass calculated by Hypermesh (under Tools > masscalc) is equal to 2.22 kg I am running a free-size optimization of this model. From the design parameters summary reflected in the *.out file (shown below), the sum of design and non-design mass is equal to 2.51524 kg: After the iterations begin, the mass registered in iteration 0 is 2.34766 kg Question: Is it wrong to expect the following: FEM mass = (design + non-design mass) = mass at iteration 0? Why are these values different?
2. ## Setting target percentages for the design space, before/after

I see that you can select different target percentages for the design space before an optimisation run begins. I also see that you can select different target percentages for the design space after the run is completed. Does selecting the percentage before or after the topology optimisation change the results significantly? What I am asking is, does it matter when I select the design space target percentage?
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