潜艇舱段模型机械声源定量识别试验研究

The experimental research on identification and quantification of mechanical noise in submarine cabin model

针对潜艇机械声源的分离量化问题,采用了将偏相干输出谱分析与层次分析相结合的层次诊断方法。建立了复杂噪声源分离量化的递阶层次结构,并通过两两比较构造判断矩阵,通过各层权重组合处理得到各噪声源的分离量化结果;为了验证该方法在实际工程应用中的有效性,开展了潜艇舱段模型机械声源定量识别水池试验研究,采用层次诊断分析方法实现了机械声源贡献分离,并通过模型偏心电机、激振器单机和组合单机试验工况考核了机械声源分离精度。经舱段模型试验验证,采用层次诊断方法得到的机械声源贡献分离偏差小于3 dB(50 Hz^1 kHz)。舱段模型试验验证了层次诊断方法在机械声源定量识别中的可行性,并为该方法的工程实用性提供支撑。

To identify the dominant noise source accurately is the premise of controlling mechanical noise of submarine effectively. To solve the separation and quantification problem of mechanical noise source for submarine, hierarchy diagnosis is proposed which combines the partial coherence output power spectrum analysis and analytic hierarchy process. Hierarchical structure is established for the separation and quantification of complex noise source, judgment matrix is constructed through pairwise comparison, the separation and quantification result of noise source can be calculated. To validate the effectiveness of hierarchical diagnosis in engineering application, the tank experimental research on quantification and identification of the mechanical noise source in submarine cabin model is carried on, the contribution rate of mechanical noise sources is separated by hierarchy diagnosis, and separation accuracy of mechanical noise sources is checked by the experiment.