基于零体积速度模态配置的结构声主动控制

发布时间：2018-10-20 17:05

【摘要】：耦合模态空间控制方法可以对被控系统的固有频率、阻尼比和模态振型进行配置。针对结构低频振动噪声的主动控制问题,本文采用耦合模态空间控制方法将结构的振动模态控制为零体积速度模态。以矩形简支板为例进行了结构声辐射主动控制仿真,将板的第1阶和第4阶振动模态控制为零体积速度模态,结果表明,简支板的低频声辐射得到了有效控制。本文提出的结构声主动控制方法可以有效控制结构低频振动噪声,同时具有物理意义清楚、控制过程简单、控制率的设计与激励力大小和位置无关等特点。
[Abstract]:The coupled modal space control method can configure the natural frequency, damping ratio and modal mode of the controlled system. To solve the active control problem of low frequency vibration and noise of structure, the coupled modal space control method is used to control the vibration mode of the structure into zero volume velocity mode. Taking the rectangular simply supported plate as an example, the active control of structural acoustic radiation is simulated. The first and fourth order vibration modes of the plate are controlled to zero volume velocity mode. The results show that the low frequency acoustic radiation of the simply supported plate is effectively controlled. The structural acoustic active control method proposed in this paper can effectively control the low frequency vibration noise of the structure. At the same time, it has the characteristics of clear physical meaning, simple control process, and the design of control rate is independent of the magnitude and position of the excitation force.
【作者单位】：大连理工大学工业装备结构分析国家重点实验室;大连理工大学船舶工程学院;
【分类号】：TB535

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