子系统对动力包双层隔振系统隔振性能影响
Study on Effect of Subsystem on Vibration Isolation Performance of Two-Stage Vibration Isolation System

目前对带子系统的动力包双层隔振系统子系统参数设计的研究甚少。针对这一现状，笔者采用试验的方法，分别研究了某型内燃动车动力包双层隔振系统子系统各隔振参数（隔振器总刚度、阻尼、隔振器刚度比）对其隔振性能及动态特性的影响。研究结果表明，将子系统设计成双层隔振主系统的动力吸振器，能使动力包双层隔振系统在发动机常规工况和停机或启动工况皆具备优良的隔振性能，并且隔振系统在子系统隔振器参数取较小的刚度，适当大的阻尼和合适的刚度比时能取得较好的隔振效果。
Since there is little study on subsystem parameters design for powerpack two-stage isolation system attached with a subsystem, experimental method was adopted to tackle the situation. Effects of subsystem parameters (isolator general stiffness, isolator damp, isolator stiffness ratio) on vibration isolation performance and dynamic characteristics of a certain diesel multiple unit powerpack two-stage vibration isolation system　were studied. The results showed that the powerpack two-stage vibration isolation system had excellent vibration isolation performance in both conventional condition and shutdown condition of engine when the subsystem act as a vibration absorber of the main system. And a better vibration isolation performance can be obtained with proper value of the stiffness of subsystem isolators,damping and stiffness ratio.