Select the variables for optimal design, and set up the constraint conditions and target function.
选取了优化设计变量，建立了优化设计的约束条件和目标函数。
The purpose of topology optimization is to find a distribution of the structure, so that it can meet the volume, displacement constraint conditions et al, and attain some optimal performances.
结构拓扑优化的目的是寻求结构的某种分布，使其能够在满足体积、位移等约束条件的情况下，让某种性能达到最优。
The constraint conditions of normal optimal model are usually rigid constraint conditions under the determined factors which may lead to exclude some excellent schemes.
常规的优化模型的约束条件都是在确定因素下进行的硬性约束，这样做的直接后果是可能排除掉了一些较优秀的方案。
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