STIFFENERS LAYOUT DESIGN FOR NOISE REDUCTION USING TOPOLOGY OPIMIZATION

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Journal of Vibration and Shock ›› 2013, Vol. 32 ›› Issue (13) : 62-65.

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STIFFENERS LAYOUT DESIGN FOR NOISE REDUCTION USING TOPOLOGY OPIMIZATION

LIU Hai GAO Hang-Shan WANG Pei-Yan LI Lei

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Abstract

An optimization approach of stiffeners layout design is proposed based on the topology optimization method to reduce sound radiation power generated by the vibrating structure. The variable density method is employed on the topology optimization problem. Artificial densities of the stiffener elements are adopted as the design variables, and the constraint condition is the upper limit of the total mass of the stiffeners. The optimization problem is solved using hybrid MMA-GCMMA algorithm, which is originated the method of moving asymptotes (MMA) family. The vibrating response of the structures and the sound radiation are solved using the FEM and BEM, respectively. Sensitivity analysis of the coupled acoustic-structural system is derived analytically based on the FEM/BEM results. Examples of stiffened box are presented and discussed. Numerical results show that the optimization approach is effective and feasible.

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topology optimization / noise reduction / stiffeners layout / sensitivity analysis

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LIU Hai GAO Hang-Shan WANG Pei-Yan LI Lei. STIFFENERS LAYOUT DESIGN FOR NOISE REDUCTION USING TOPOLOGY OPIMIZATION[J]. Journal of Vibration and Shock, 2013, 32(13): 62-65