Abstract In this paper, a reduced order coupled finite element/boundary element method (FEM/BEM) for control of noise radiation and sound transmission of vibrating structure by viscoelastic and passive piezoelectric treatments is presented. The system consists of a sandwich structure composed of elastic faces and a viscoelastic core (with surface mounted piezoelectric patches) and coupled to external/internal acoustic domains. The passive shunt damping strategy is employed for vibration attenuation in the low-frequency range while dissipative viscoelastic materials are used for the higher-frequency domain. The originality of the present paper lies (i) in evaluating the classically used FEM/BEM methods for structural-acoustics problems when taking account smart systems at the fluid-structure interfaces and viscoelastic interlayers and (ii) in development of a reduced-order model, based on a normal mode expansion, able to capture the main characteristics of the system dynamical behavior.

中文翻译：

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使用粘弹性材料和并联压电贴片进行消音和减振的数值模拟

摘要 在本文中，提出了一种通过粘弹性和被动压电处理控制振动结构的噪声辐射和声音传输的降阶耦合有限元/边界元方法（FEM/BEM）。该系统由一个夹层结构组成，该结构由弹性面和粘弹性核心（带有表面安装的压电贴片）组成，并与外部/内部声学域耦合。被动分流阻尼策略用于低频范围内的振动衰减，而耗散粘弹性材料用于高频域。