一端周向激励的圆柱壳声辐射特性研究

针对一端受周向均布激励的圆柱壳建立了新的理论模型,结合线激励下平板的有效传递导纳理论对圆柱壳表面的振动响应及声辐射功率进行仿真计算和分析,结果表明一端受均布激励作用的圆柱壳表面的声辐射功率在中低频段随频率的增大而增加,在临界频率处出现较大的波动,在环频处达到最大值,之后仍有较小波动并略有下降。实验测量结果证明了理论模型的有效性。

Radiation analysis for cylindrical shell with circumferential excitation on one end

A novel theoretical model is established for cylindrical shells with the circumferential excitation on one end. An effective transfer mobility method for the finite plate with line excitation is introduced to solve the problem of vibration response and sound radiation of a cylindrical shell. Simulation results show that the radiation power from a cylindrical shell with circumferential excitation on its one end increases with frequency in the middle and low frequency band. The calculated power curve stronger fluctuates at the critical frequency, reaches its maximum at the ring frequency, and remains fluctuation with slight decline as frequency continues to increase above the ring frequency. Experiment results show validity of the theoretical model.