新型铁道车辆液气缓冲器动态特性

为了提高货车编组场的安全连挂冲击速度和调车作业的效率，开发新型铁道车辆缓冲器，概述了新型铁道车辆液气缓冲器的基本结构及其工作原理，建立了新型液气缓冲器的列车纵向动力学计算模型，利用数值模拟方法对液气缓冲器进行了动态特性分析。计算结果表明，新型液气缓冲器调车冲击时，在阻抗力不超过2200kN时，容量可以达到160kJ，吸收率大于90％，新型液气缓冲器能使货物列车的紧急制动特性和起动牵引特性满足车辆使用要求，提高车辆的调车冲击速度，减缓及耗散列车在运行中车辆间的纵向冲击和振动。

Dynamic characteristic of new hydro-pneumatic buffer for railway vehicle

In order to improve the safety-impacting speed of freight organized into groups' spot and manipulating vehicle efficiency,a new type of hydro-pneumatic buffer for railway vehicle was developed,its basic structure and principle were summarized,a lognitudinal dynamics calculating model of train with the buffers was established,the dynamic characteristic of the buffer was analyzed by numerical simulation method.The calculating result shows that the buffer capability may reach 160 kJ,and its absorptivity may exceed 90% in the condition that the biggest impedance force of the buffer is no more than 2200 kN as manipulating vehicle,the impacting speed of manipulating vehicle is increased,the lognitudinal impulsion and libration between vehicles are decreased and dissipated,the hydro-pneumatic buffer may be adapted to the request of heavy loading and speed increasing train.2 tabs,8 figs,12 refs.