动车组车下大型设备振动特性分析研究

Analysis of the vibration performance of large-sized underfloor equipment on DMUs

动力包系统是安装在内燃动车组车下的大型振动设备,具有多子结构的双层隔振系统。隔振系统由具有一定刚度的橡胶材料组成,在保持一级(第1级)隔振系统刚度不变的前提下,将另一级(第2级)隔振系统按照一定的规律设置不同的规格,分别对框架与机组在x、y、z、α、β和γ方向上的模态匹配值进行了分析研究,得出了动力包系统中隔振系统刚度与模态匹配的相互关系,即随着隔振系统刚度增大,模态匹配值基本呈缓慢增大趋势,为后续优化设计提供思路和方向。

Power pack is a large-sized vibratory equipment installed under the floor of DMU vehicle with multiple substructures and two-stage vibration isolation system composed of rubber material with some rigidity. By means of keeping the rigidity of the first-stage vibration isolation system unchanged, and the second-stage isolation system is set to different specifications according to certain rules after respective studies of the mode matching between the frame and power set at x、y、z、α、βand γ directions. The research results reveal the correlation between the rigidity of the vibration isolation system in the power pack and the mode matching, indicating that the mode matching value basically increase slowly with the increase of the rigidity of the vibration isolation system.