建立一个包括有机玻璃水箱和主动隔振器的实验系统，研究主动隔振对降低结构振动及其声辐射的有效性。实验模型的建立是基于流固耦合系统的有限元分析和局部模态测试，通过数值分析确定辐射面的振动模态以及辐射声场分布。扰动源的干扰频率接近辐射面固有频率，在水中形成共振状态下的辐射声场。扰动源采用四点主动隔离，四个电磁作动器同时控制并采用自适应对消算法，抑制扰动源周期性干扰引起的振动。实验结果表明主动隔振能够明显降低平板的辐射声压。

An experimental system, including a plexiglass water container and four active vibration isolators, was established to demonstrate the efficiency of active vibration isolation in suppressing structural vibration as well as underwater sound radiation. For this fluid-structure coupled system, finite element analysis and experimental modal testing were conducted to exhibit and validate the vibration modes and radiated sound in the fluid. In the experiment, the fundamental frequency of the rotating disturbance is nearly equal to the first natural frequency of the coupled system, which helps to create a strong sound field in the water by resonant structural vibration. The disturbance source is supported by the four electromagnetic vibration isolators, which suppress the quasi-periodical vibration jointly according to a modified adaptive control algorithm. The experimental results show that the radiated underwater sound pressure can be reduced substantially.