噪声与振动控制2017，Vol.37Issue(3)：96-100,130,6.DOI:10.3969/j.issn.1006-1355.2017.03.019
时速250公里动车组车内声源特性及其贡献量分析
Characteristics and Contribution Analysis of Interior Noise Sources of a 250 km/h Internal Combustion Multiple Unit
摘要
Abstract
The interior noise of a 250 km/h internal combustion multiple unit (ICMU) is investigated. The characteristics and contributions of interior noise sources are analyzed by means of test and simulation. Firstly, the intensity, frequency and distribution of the interior noise sources are measured by the spherical acoustic array. The results show that the energy of the interior noise at the end of the coach is mainly concentrated in the 1/3 octave band of 400 Hz-2000 Hz with center frequencies. And the main sources are identified in the areas of gangway and floor. Then, the interior noise prediction model is established using statistical energy analysis method (SEA). In this model, the applied sound source excitations are from the field measurement results, and the acoustic parameters of the vehicle's body structures are from the laboratory test results. The prediction results are compared with those of noise source identification and the reliability of the simulation model is verified. Finally, based on the verified model, the contributions and transfer paths for different source input at the rear of the coach are analyzed. The results show that the main noise sources at the rear end of the coach of the 250 km/h ICMU are wheel/rail rolling noise, followed by aerodynamic noise. And the contribution rates of the wheel/rail rolling noise are 80 % in the 1/3 octave band of 50 Hz-100 Hz and 315 Hz-5000 Hz with center frequencies. The contribution rates of the noise sources through floor and gangway are 50%, and those through sidewall and roof are 38%.关键词
声学/动车组/车内噪声/声源识别/传递路径/贡献量Key words
acoustics/internal combustion multiple unit (ICMU)/interior noise/noise source identification/transfer path/source contribution分类
数理科学引用本文复制引用
张骏,张捷,陈沛,蔡振兵,肖新标..时速250公里动车组车内声源特性及其贡献量分析[J].噪声与振动控制,2017,37(3):96-100,130,6.基金项目
国家自然科学基金(U1434201、51475390) （U1434201、51475390）
牵引动力国家重点实验室自主研究课题(2015TPL_T08)国家重点研发计划课题(2016YFB1200503) （2015TPL_T08）
