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复合材料层合板的声辐射模态幅值分析

, PP. 210-216

Keywords: 层合板,固有频率,声辐射,噪声控制,数值分析

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Abstract:

低频时,控制振动结构第一阶声辐射模态伴随系数可有效控制总声功率。通过分层有限元模型可以求解层合板的位移模式。对层合板的固有频率和动态响应进行了理论推导。结合声辐射模态理论,研究了层合板铺设角度、弹性模量比、跨厚比以及阻尼比等结构参数对层合板结构第一阶声辐射模态伴随系数的影响。计算结果表明,分层理论结合有限元方法可以较准确地计算层合板固有频率,而且铺设角度和跨厚比对层合板结构声辐射模态影响较大。

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