摘要
对船舶螺旋桨低频宽带噪声理论预报方法进行了研究。文章全面综合归纳了现有船舶螺旋桨低频宽带噪声预报的主要方法,并对最常用的谱方法开展了分析,给出了详细的公式推导和数值离散过程;同时通过与文献中试验结果比较,证实了该预报方法的合理性。利用谱方法预报得到了某船舶螺旋桨的1/3Oct.低频宽带噪声,结果表明,船舶螺旋桨低频宽带噪声在叶频及其谐频处存在脉动的峰值(humps),其低频宽带噪声谱量级主要取决于螺旋桨0.7r处的特征值;通过研究得到了螺旋桨低频宽带噪声与主要参数的定量关系,研究成果可为螺旋桨的低噪声设计提供参考。
Prediction methods of ship propeller low-frequency broadband noise are summarized, in which the most frequently used spectrum method is analyzed, and detailed formula derivation associated with numerical discrete process for this method is presented. The reasonableness of the method is acknowledged by comparing with the test results on the open literature. 1/3 octave low-frequency broadband noise for a ship propeller is predicted with spectrum method. The result shows that there are fluctuating humps at multiples of the blade passage frequency. Quantitative relations between low-frequency broadband noise and key parameters are obtained through the research. This research can provide a reference for low noise design of propeller.
出处
《中国造船》
EI
CSCD
北大核心
2014年第3期1-11,共11页
Shipbuilding of China
关键词
船舶螺旋桨
低频宽带噪声
定量预报
谱方法
ship propeller
low-frequency broadband noise
quantitative prediction
spectrum method
