摘要
对某船螺旋桨噪声进行了预报.高频噪声预报采用模型试验方法进行,在国家重点试验室大型循环水槽中完成了桨模高频噪声的测量,测试结果经量纲一的量方法换算至实船.采用面元法计算非定常力,通过力与声级的关系换算出低频离散谱噪声.求解出螺旋桨随机连续性力,然后换算出低频连续谱噪声.从预报结果总结出螺旋桨噪声随频率的变化规律以及速度对噪声的影响.
The ship propeller noise has been investigated. The high frequency noise of shippropeller model has been observed and measured in a large circulating tunnel atthe national key lab. Then the high frequency noise of full-scale propeller has been calculated by nondimensional method. The low frequency discrete noise is gained according to the relation of sound level and the unsteady forces of propeller that is calculated by surface panel method. The low frequency continuous noise is achieved by calculating random continuous forces of propeller. The propeller noise characteristic in frequency domain and the effect of velocity to propeller noise has been obtained by analyzing the computing results.
出处
《武汉理工大学学报（交通科学与工程版）》
2008年第5期818-821,共4页
Journal of Wuhan University of Technology（Transportation Science & Engineering）
基金
国防重点实验室基金项目资助(批准号:51443020103JB)
关键词
螺旋桨
噪声
循环水槽
面元法
propeller
noise
circulating water channel
surface panel method
