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Study on Mathematical Models of Optimization Design for Vibration Rreduction of Hybrid Steel-composite Structure
YANG De-qing;CHEN Jing;GUO Wan-tao;LUO Fang
2011, 31 (3):
24-28.
DOI: 10.3969/j.issn.1006-1355-2011.03.006
Composite materials are widely used in engineering structures for its excellent performances of high damping loss factor, low density, high special strength, high special stiffness etc. Design of composite structure is a combination process of the mechanical performance with the materials design. For quite a few design parameters and complex influencing factors in the process, the optimal design becomes very important. Based on the different vibration reduction evaluation criterions, various structural dynamic optimization design models can be formulated. And their effects for vibration reduction can be quite different. In this paper, a synthetic evaluation method, considering vibration level difference and power flow level difference with structure’s weight or power flow at the evaluation points as objective functions, is presented. Taking the structural dynamic optimization design of the steel-composite mounting as an example, the corresponding mathematical model is established. By introducing multi-island genetic method, the optimization problems are solved. Computational results show that using this model for composite structure optimization, more feasible solution than that using conventional optimization model can be obtained.
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