分层有限元模型下层合板声功率优化设计

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振动与冲击 ›› 2015, Vol. 34 ›› Issue (16) : 85-89.

论文

分层有限元模型下层合板声功率优化设计

吴锦武，彭文辉，赵飞

作者信息 +

Design of optimum acoustic power of composite laminates plate based on layer-wise FEM

WU Jin-wu，PENG Wen-hui，ZHAO Fei

Author information +

文章历史 +

摘要

基于遗传算法对层合板结构辐射声功率最小化进行铺设角优化；利用分层有限元模型求解层合板固有频率及振速分布；通过声辐射模态理论计算结构辐射声功率。以铺设角作为设计变量、辐射声功率作为优化变量，分别以某4层、8层层合板结构为例，研究不同频率时声功率最小化对应的优化铺设角。数值分析结果表明，在同一优化铺设角下，优化后第一阶声功率与辐射总声功率差别不大；对相同层合板结构而言，随频率增加声功率优化量增大；相同厚度下层合板铺设层越多声辐射功率优化量越小。

Abstract

An optimization method to minimize sound power of laminated composite plate based on genetic algorithm is presented in this paper. The layerwise finite element model is imposed to determine the natural frequencies and velocity distributions of laminated composite plates. Based on the acoustic radiation mode, sound power is calculated based on the acoustic radiation mode theory. A four-layer and eight-layer laminated plate were used as examples, the fiber orientation angles are chosen as design variables and the design objective is to minimize sound power. And the optimal orientation angles with sound power minimization are discussed under different frequencies. The numerical simulations show that the first order sound power and total sound power are basically same under the same optimum orientation angle. Then according to the same laminated composite plate, the optimal amount of sound power is increased with the increase of vibrating frequency. And according to the same thickness of laminated composite plate, sound power optimization is smaller when the layer number of the plate is more.

导出引用

吴锦武，彭文辉，赵飞. 分层有限元模型下层合板声功率优化设计[J]. 振动与冲击, 2015, 34(16): 85-89

WU Jin-wu，PENG Wen-hui，ZHAO Fei. Design of optimum acoustic power of composite laminates plate based on layer-wise FEM[J]. Journal of Vibration and Shock, 2015, 34(16): 85-89

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