车内相似耦合声场的设计参数灵敏度分析

Design Parameters Analysis of Similar Coupled Acoustic Field Inner Automobile

建立了由汽车发动机室和驾驶室组成的相似耦合声场模型,应用统计能量法分析了发动机室能量自损耗因子和防火墙隔板厚度对各子系统空间声能的影响,并通过灵敏度分析进一步揭示了各子系统的空间声能随发动机室能量自损耗因子和隔板厚度变化的特性,为汽车设计阶段的参数优化提供了参考依据。

A model of similar coupled acoustic field consisted of the engine room and the driver room was established. The effects d the energy self-lost factor and the firewall thickness of the engine room on the acoustic energy of each subsystem were studied with the statistic energy analysis method. Subsequently, the parametric sensitivity analysis illuminated the energy varying characteristics with respect to the energy self-lost factor and the firewall thickness of the engine room. The results provide a reference for the parameter optimization during automobile design.