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针对出口内燃动车采用动力包双层隔振系统这种典型紧凑结构的隔振问题,采用理论推导的方法,建立了子系统参数与系统振动特性之间的函数关系式,研究了子系统质量比、阻尼比和频率比对系统振动特性的影响规律,得到了动力包多子系统双层隔振系统的刚度参数。为了验证设计结果的正确性,对动力包进行了地面台架试验。结果表明,机组的振动烈度在各工况下均处于正常的工作状态;柴油机转速在小于1 100 r/min的范围内隔振效率在85%以上,在大于1 100r/min的范围内隔振效率均在90%以上,验证了动力包多子系统双层隔振设计的正确性。
Aiming at the vibration isolation problem of the typical compact structure of the exit diesel vehicle with dynamic package double-layer vibration isolation system, the functional relationship between the subsystem parameters and the system vibration characteristics is established by using the theoretical derivation method. , Damping ratio and frequency ratio on the vibration characteristics of the system were obtained. The stiffness parameters of double-layer vibration isolation system with multiple sub-systems were obtained. In order to verify the correctness of the design results, the power pack was tested on the ground. The results show that the vibration intensity of the unit is in normal working condition under all operating conditions. The vibration isolation efficiency of the diesel engine is above 85% when the rotating speed of the diesel engine is less than 1,100 r / min, and the vibration isolation is within the range of more than 1,100 r / min The efficiency is above 90%, which verifies the correctness of double-layer vibration isolation design of multi-subsystem power package.