基于统计能量分析法的机舱噪声分析

Prediction and Analysis of Engine Room Noise Based on Statistical Energy Analysis

利用VA One软件建立机舱的统计能量分析模型.检验模型适用于统计能量分析方法,确定模型参数.通过分析模型计算结果,发现舱室声压级曲线和子系统间耦合损耗因子息息相关.对比分析结构激励和空气激励产生的噪声量,验证舱室噪声主要是由结构激励引起.通过分析发现机舱顶棚内装材料对集控室噪声的影响很小,在对机舱舱室进行噪声预报时,可以不予考虑.

A statistical energy analysis model of engine room is built by using VA One software.The test model is suitable for the statistical energy analysis method and the model parameters are determined.Through the analysis of model results,found that the sound pressure level is closely related to the subsystem coupling loss factor.By comparing and analyzing the noise produced by structural excitation and air excitation,it is proved that cabin noise is mainly caused by structural excitation.