装甲车车内声学响应分析(英文)

Interior acoustic response analysis of armored vehicle

装甲车的振动噪声控制一直是理论和工程领域不断研究的课题,其车内噪声直接影响作战人员的作战水平,进行装甲车内部噪声的研究十分必要。首先分别建立并分析了装甲车车内空腔模型以及考虑结构和空气之间相互作用的声固耦合模型,通过对比耦合前后的声学模态振型图,得出车体结构对空腔声学特性有一定的影响;然后使用边界元法对整车声固耦合模型进行声学响应分析,得到驾驶员右耳处的声压分布情况;最后对声压峰值的频率点进行板件声学贡献量分析,为改善车内的声学特性提供了参考依据。

It has been a research top to study the vibration and noise control of armored vehicle in theory and en- gineer field since the internal noise directly affects the fighter＇ s operational level. So carrying on this research is a necessary task. First the armored vehicle inner cavity model and the acoustic-strncture coupling model that con- sidering the interaction between the structure and the air were built and analyzed. It was concluded that the body structure has some certain influence on the acoustic characteristics of the cavity by comparing the acoustic modal graphs. Then the pressure distribution at the driver＇ s right ear was gotten by analyzing the vehicle＇ s acoustic re- sponse of acoustic-structure coupling model using boundary element method. Finally the panel acoustic contribu- tion of frequency was analyzed at peak pressure, which provides a reference for improving the acoustic characteris- tics of the vehicle.