噪声巅值
Simulation results for the structural acoustical coupling in enclosed space show that the structure-brone noise can be reduced effectively in assigned frequency band, the maximum control value for noise peak value is near 20 dB ( A).
封闭空间结构振动声耦合反馈力控制仿真结果表明:通过合理选择性能加权函数,噪声可以在指定频带得到良好的控制,最大噪声峰值近20dB(A)。
In this paper an experimental investigation was carried out, and it is proved: no matter whether tip vortex cavitation is visible, narrow band noise peak is connected with the flow near the tip of propeller.
本文用实验证实这种窄带噪声峰与桨叶梢部流动有关,无论梢涡空泡可见与否,都可能出现。
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