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《Journal of Mechanical Strength》 2012-05
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DESIGN OPTIMIZATION METHOD OF STIFFENERS ON PLANE AND SHELL STRUCTURES

JI XueRong DING XiaoHong (College of Mechanical Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)  
A design optimization method of stiffeners on plane and shell structures is suggested,which comprises of topology and sizing design optimizations of stiffeners.A modified adaptive growth method is applied to the topology design optimization of stiffeners on the basis of the growth mechanism of root systems of plants.With contrast to the conventional topology design optimization with the design variables of the material densities,the modified adaptive growth method describes the arrangement of stiffeners with the real stiffener layout.Thus,the result can be used to manufacture without any complicated post process.By comparing with the current adaptive growth method,the modified adaptive growth method introduces a limit of height of stiffeners to meet the engineering requirements.Moreover,indicators of stability and degeneration according to the growth mechanism of root systems of plants are introduced to improve the efficiency of computation.Examples show that clear and reasonable topological arrangement of stiffeners can be obtained by applying the modified adaptive growth method.In order to further improve the mechanical performance of the structures,sizing optimization of stiffeners is carried out on the base of the obtained layout of stiffeners of the structures.An example shows that the weight of the structure is decreased by 6%,and the stiffness of the structure is increased by 4%.
【Fund】: 国家自然科学基金(50875174 51175347);; 上海市研究生创新基金项目(JWCXSL1002)资助~~
【CateGory Index】: TH122
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