【摘要】 通海管路系统辐射噪声是船舶噪声控制中的关键难点，尤其以管路中泵组产生的强叶频线谱噪声最为突出。本文提出一种适用于泵组叶频噪声控制的管路系统声学匹配性设计方法，首先采用高精度数值方法模拟了泵组声源特性；然后以泵组简化声源作为输入，系统地研究了声固耦合作用下管长、管径及泵叶频对通海管口辐射噪声的影响规律；最后，基于全因子试验进行了影响参数匹配设计研究。结果表明，通海管口辐射噪声随管径增大而增大，随管长增加表现出以半波长为周期的分布特性；泵叶频越高，其周期性分布特征越显著。采用声学匹配性设计后，典型工况下可实现最低9.35 dB的降噪量，验证了本文方法在泵组叶频噪声控制中的有效性。更多还原

【Abstract】 The radiated noise of the sea-connected pipeline system is a key challenge in ship noise control, particularly the strong blade-passing-frequency(BPF) tonal noise generated by pumps in the pipeline. This paper proposes an acoustic matching design method for pipeline systems aimed at controlling the blade-passing-frequency noise of pumps. First, the pump acoustic source characteristics were simulated with high precision numerical approach. Then, taking the simplified acoustic source of the pump as input, the effects of pipeline length, diameter, and pump BPF on the radiated noise at the seaconnected outlet under vibro-acoustic coupling were systematically investigated. Finally, a full factorial experiment was conducted to perform a matching design study of the influencing parameters. The results indicate that the radiated noise at the sea-connected outlet increases with the pipeline diameter and exhibits a distribution characteristic with a half-wavelength period as the pipeline length increases; the higher the pump BPF, the more significant the periodic distribution characteristics. After adopting the acoustic matching design, a minimum noise reduction of 9.35 dB under typical operating conditions can be achieved, verifying the effectiveness of the proposed method in controlling the blade-passing-frequency noise of pumps.更多还原