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首页> 外文期刊>Journal of vibration and control: JVC >Control of Sound Radiation of an Active Constrained Layer Damping Plate/Cavity System Using the Structural Intensity Approach
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Control of Sound Radiation of an Active Constrained Layer Damping Plate/Cavity System Using the Structural Intensity Approach

机译：结构强度法控制主动约束层阻尼板/空腔系统的声辐射

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摘要

Considerable attention has been devoted to actively and passively controlling the sound radiation from vibrating plates into closed cavities. With the advent of smart materials, extensive effort has been exerted to control the vibration and sound radiation from flexible plates using smart sensors/actuators. The Active Constrained Layer Damping (ACLD) treatment has been used successfully for controlling the vibration of various flexible structures. The treatment provides an effective means for augmenting the simplicity and reliability of passive damping with the low weight and high efficiency of active controls to attain high damping characteristics over broad frequency bands. This study investigates a numerically simulated example consisting of an ACLD treated plate/acoustic cavity system excited by a point harmonic force. In this study, an ACLD treated plate/acoustic cavity coupled finite element model is utilized to calculate the structural intensity and sound pressure radiated by the vibrating plates. In the passive control, the optimum placement of ACLD patches is determined by the structural intensity of ACLD treated plates and compared to the results obtained by using the strain energy approach. The influence on the structural intensity of the plate due to the damping treatment is investigated.
机译：主动和被动地控制从振动板到封闭腔体的声辐射已经引起了极大的关注。随着智能材料的出现，人们已经进行了广泛的努力来使用智能传感器/执行器来控制柔性板的振动和声音辐射。主动约束层阻尼（ACLD）处理已成功用于控制各种柔性结构的振动。该处理提供了一种有效的手段，可通过降低主动控制装置的重量和效率来提高被动阻尼的简单性和可靠性，从而在宽频带上实现高阻尼特性。这项研究调查了一个数值模拟的示例，该示例由ACLD处理的板/声腔系统（由点谐波力激发）组成。在这项研究中，ACLD处理的板/声腔耦合有限元模型用于计算振动板辐射的结构强度和声压。在被动控制中，ACLD贴片的最佳放置取决于ACLD处理过的板的结构强度，并与使用应变能方法获得的结果进行比较。研究了阻尼处理对板结构强度的影响。

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