Abstract A new method is proposed for precise shaping of the acoustic radiation of a vibrating plate. The potential applications of this method are: to optimize acoustic radiation of a plate employed as a sound source; and to enhance transmission loss of a plate used as a noise barrier, both in passive or active control solutions. The proposed method is based on mounting several additional ribs and masses (passive elements) to the plate surface at locations determined by an optimization process. This optimization involves a model of the vibroacoustic system, a cost function representing the objective under consideration, and an optimization algorithm. The method is described, and results of both numerical simulation and experimental validation are presented. Analysis of results shows that the transmission loss introduced by a passive noise barrier can be enhanced by more than 7 dB in frequency bands of interest. Furthermore, these enhancements can be combined with optimized arrangements of actuators and sensors, resulting in a hybrid passive-active noise control system.

中文翻译：

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塑造振动板的声辐射

摘要 提出了一种振动板声辐射精确整形的新方法。这种方法的潜在应用是：优化用作声源的板的声辐射；并在被动或主动控制解决方案中提高用作噪声屏障的板的传输损耗。所提出的方法基于在由优化过程确定的位置将多个附加肋和质量块（无源元件）安装到板表面。该优化涉及振动声系统模型、表示所考虑目标的成本函数和优化算法。描述了该方法，并给出了数值模拟和实验验证的结果。结果分析表明，在感兴趣的频带中，无源噪声屏障引入的传输损耗可以提高 7 dB 以上。此外，这些增强功能可以与执行器和传感器的优化布置相结合，从而形成混合被动-主动噪声控制系统。