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首页> 外文期刊>Zeitschrift fur Angewandte Mathematik und Mechanik >Stochastic structural topology optimization: existence of solutions and sensitivity analyses
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Stochastic structural topology optimization: existence of solutions and sensitivity analyses

机译:随机结构拓扑优化:解和灵敏度分析的存在

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摘要

We consider structural topology optimization problems including unilateral constraints arising from, for example, nonpenetration conditions in contact mechanics or non-compression conditions for elastic ropes. To construct more realistic models and to hedge off possible failures or an inefficient behaviour of optimal structures, we allow parameters (for example, loads) defining the problem to be stochastic. The resulting nonsmooth stochastic optimization problem is an instance of stochastic mathematical programs with equilibrium constraints (SMPEC), or stochastic bilevel programs. The existence as well as the continuity of optimal solutions with respect to the lower bounds on the design variables are established. The question of continuity of the optimal solutions with respect to small changes in the probability measure is analysed. For a subclass of the problems considered the answer is affirmative, thus establishing the robustness of optimal solutions. [References: 32]
机译:我们考虑结构拓扑优化问题,包括单方面的约束,例如,接触力学中的非渗透条件或弹性绳的非压缩条件等。为了构建更现实的模型并应对可能的故障或最优结构的无效行为,我们允许定义问题的参数(例如载荷)是随机的。产生的非平稳随机优化问题是带有平衡约束(SMPEC)的随机数学程序或随机双级程序的实例。建立了关于设计变量下界的最优解的存在性和连续性。分析了关于概率度量的微小变化的最优解的连续性问题。对于所考虑问题的子类,答案是肯定的,从而确定了最优解的鲁棒性。 [参考:32]

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