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- W2378045309 abstract "Because of the complexity in modeling and the uncertainty under stress,it is difficult to determine the shape and topology of free-form structures to ensure high safety performance requirements. In order to coordinate architectural forms and mechanical behavior of free-form structures,this research adopted differential evolution optimization algorithm to solve the mechanical fine-tuning optimization problem of shape,and furthermore,to solve the combined optimization problem about shape and material distribution. Optimal surface shape as well as topology configuration was obtained. In the process of optimization,the structural nonlinear H∞robustness evaluating index was used as optimization goal,and the coordinates of the parameterized free-form surface creation method based on NURBS and thickness of meshed surface elements were used as optimization variables. The optimization results show that differential evolution algorithm has strong optimization ability and the optimization design method by adjusting the shape and material distribution of surface can significantly improve both robustness and rigidity of the structure. In addition,through nonlinear buckling analysis about hexagonal star dome,this paper examines the connection and difference between robustness index and strain energy index. It's concluded that robustness index can better reflect the buckling process of structure and represent destruction consequence. Optimization design of free-form structures adopting robustness index can ensure the safety of structures." @default.
- W2378045309 created "2016-06-24" @default.
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- W2378045309 date "2014-01-01" @default.
- W2378045309 modified "2023-09-28" @default.
- W2378045309 title "Optimization design research of free-form structures based on robustness" @default.
- W2378045309 hasPublicationYear "2014" @default.
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