基于统计能量分析的船舶舱室噪声研究

基于统计能量分析方法,探究了损耗因子对舱室噪声的影响,并基于实船损耗因子开展了船舶舱室噪声研究。基于统计能量分析方法,建立多舱段典型船舶结构模型,分别施加不同类型的激励载荷,计算并分析了损耗因子对舱室噪声仿真计算结果的影响;针对某船舶进行舱室噪声预报分析,并与实船舱室噪声测试结果比对,验证了舱室噪声预报方法的准确性。在此基础上,通过舱室噪声分布和舱室噪声主导分量分析,探究了船舱室噪声的分布规律,给出船舶噪声控制措施。研究表明,损耗因子对噪声预报结果影响较大,实船测试损耗因子对舱室噪声预报具有重要影响;不同类型设备对舱室噪声影响差异较大,需根据实际情况采用不同的噪声防护措施。

Research on ship cabin noise based on SEA

Based on the statistical energy analysis(SEA)method,influence of Loss Factor(LF)of ship structure on cabin noise is explored,and research on ship cabin noise isalso carried out based on the LFs of a real ship.SEA modelof a typical ship structure with multiple compartments is established.By applying different types of excitations to the model,influence of LF on simulation results of cabin noise iscalculated and analyzed.Cabin noise prediction of a shipis carried out and the accuracy of cabin noise prediction method is verified by comparing with noise test.Through the analysis of distribution of cabin noise and the dominant component of cabin noise,the distribution law of cabin noise is explored,and preliminary noise control measures are given.The research shows that LF has important influence on prediction results.LFfrom real ship test plays an important role on cabin noise prediction.Different types of equipment yielddifferentresults,and noise protection measures should be adopted according to actual situation.