关键词: 声学, 弹性圆柱壳, 水下声辐射, 有源控制

Abstract:

Experimental study on active control of a submerged finite cylindrical shell using secondary force sources was performed. Through the experiment, both position and number of secondary exciters and errors sensors and excitation frequency were varied during the test to determine the influence on control effects. The results show that the underwater sound radiation of the cylindrical shell subjected to force excitation can be effectively attenuated by method of active noise control, the area of noise reduction would be enlarged with increasing the number of secondary exciter and error sensor; the active noise control of the cylindrical shell at 3000Hz is still valid；at the same time, the sound radiated from the submerged cylindrical shell subjected to multiple lines spectrum excitation can also be suppressed by introduced secondary force excitation.