摘要
随着高速列车运行速度的不断提升,高速列车内部噪声与限值之间矛盾日益突出。在运行工况下对噪声源进行识别是低噪声设计的前提和必要手段。传递路径分析提供了一种快速有效的分析车厢内部主要噪声传递路径和噪声源贡献的技术。因此,比较不同的激励源对车厢内部噪声贡献大小和判断主要传递路径分析,对于改善车厢内部声环境设计有重要参考价值。利用运行工况下传递路径分析技术对高速列车CRH380B进行测试,首次将气动噪声作为一种高速列车主要激励源进行分析,得到了不同的噪声源贡献量的对比结果。通过结果分析,车厢内噪声主要来自于转向架和车顶区域。
At present, the coach noise problem becomes more and more critical for China Railway High-speed （CRH） with increase in speed. The method of operational transfer paths analysis （OTPA） provides a fast and efficient mean to identify noise transferring path and evaluate noise sources contribution. The results of OTPA are helpful to improve the coach acoustic environment. Here, OTPA was applied to measure CRH380B high speed train considering the aerodynamic noise as a major excitation source for the first time, and the comparison of different noise sources contribution was achieved. According to analysis, it was shown that the main noise source contribution comes from bogie and roof of a coach.
出处
《振动与冲击》
EI
CSCD
北大核心
2013年第21期189-196,共8页
Journal of Vibration and Shock
基金
国家自然科学基金项目(10974217)
