应用动力吸振器降低动车组司机室内噪声

Application of Dynamic Vibration Absorber to Reduce Cab in Noise of EMU

通过试验和仿真相结合的方法,研究动车组司机室车体结构的结构特性和隔声性能,分析加筋板结构低频振动与隔声性能的特殊关系。基于司机室板筋结构的声振特性,设计动力吸振器,优化动力吸振器参数,通过Virtual.Lab仿真软件计算结构的振动响应,分析动力吸振器对加筋结构的减振效果,得出最优的吸振器布置。仿真结果表明,通过施加动力吸振器,可抑制加筋板结构的振动,控制其振动辐射,实现对车内噪声的控制。

Combined with test and simulation method,the structural characteristics and sound insulation performance of EMU cab are studied,then special relationship between low frequency vibration and sound insulation performance of stiffened plate structure is analyzed in this paper.Based on the acoustic and vibration characteristics of the ribbed structure,design dynamic vibration absorber and optimize parameters.The vibration response of the structure is calculated by Virtual.Lab,and the vibration absorption effect of the dynamic absorber on the rebar structure is analyzed,and the optimal arrangement of the absorber is obtained.The simulation results show that the vibration of the ribbed structure can be suppressed and the vibration radiation can be controlled by applying the dynamic vibration absorber,and realize the reduction of the noise.