噪声与振动控制Issue(4)：138-144,7.DOI:10.3969/j.issn.1006-1335.2013.04.029
急救车车厢内部噪声仿真分析与优化
Simulation Analysis of Interior Noise and Optimization of an Ambulance Carriage
白松 1徐新喜 1刘孝辉 1杨猛 1赵秀国1
作者信息
- 1. 军事医学科学院 卫生装备研究所，天津 300161
- 折叠
摘要
Abstract
Based on the theory of multi-body system dynamics, the finite element model of vehicle’s body, the rigid-flexible coupled model of the vehicle and the acoustic boundary element model of the vehicle of an ambulance carriage were established by applying a variety of simulation codes. Road roughness and engine vibration were simulated and the weighted SPL of field points in the carriage under these excitations were computed in the frequency range of 20~150 Hz. Considering the magnitudes and the positive/negative nature of wall panels’acoustic contribution, damping treatments were taken on different combinations of panels to reduce the SPL peak values at several field points. Finally, the optimal damping treatment was confirmed. The results show that the magnitudes and frequency distribution of the SPL peaks of the field points depends on the frequency distribution of the exciting force’s energy. The adhesive damping materials can reduce the noise as well as change the frequency distribution of the SPL. The noise reduction measures can also reduce the SPL around the crew of the ambulance.关键词
声学/路面不平度/发动机激励/声学贡献分析/阻尼降噪Key words
acoustics/road roughness/engine excitation/acoustic contribution analysis/noise reduction with damping分类
通用工业技术引用本文复制引用
白松,徐新喜,刘孝辉,杨猛,赵秀国..急救车车厢内部噪声仿真分析与优化[J].噪声与振动控制,2013,(4):138-144,7.
