某型高速动车组牵引变流器噪声控制及仿真优化研究

Noise Control and Simulation Optimization for Traction Converter of High-speed EMUs

某型高速动车组现场运行时牵引变流器噪声突显,产生刺耳的啸叫声,严重影响乘车人员舒适性。针对这一现象,开展了变流器现场和车间噪声声学测试,了解其声学特性,确定啸叫声来源;在此基础上结合变流器结构及声传播特性,提出了声学控制优化方案,并对优化方案进行了声学仿真计算和试验验证。结果表明,优化方案能明显改善现场变流器噪声水平,提高乘坐舒适性。

It was found that the noise of traction converter was prominent when a high-speed EMUs was running,resulting in a harsh whistle,which seriously affected the sound comfort.Aiming at this phenomenon,the acoustic tests of converter were carried out in the field and workshop.The acoustic characteristics were understood and the source of the whistle was determined.On this basis and concerning the converter structure and sound propagation characteristics,the optimization scheme of acoustic control was proposed and the acoustic simulation calculation and test verification were carried out for this scheme.The results showed that the optimization scheme could significantly improve the noise level of the converter and improve the comfort.