Design method for optimal damping coefficient of secondary transverse shock absorber of low-speed rail vehicle

The invention relates to a design method for the optimal damping coefficient of a secondary transverse shock absorber of a low-speed rail vehicle and belongs to the technical field of low-speed rail vehicle suspensions of low-speed rail vehicles. A vehicle 17-degree-of-freedom running transverse oscillatory differential equation of the low-speed rail vehicle is established, MATLAB/Simulink simulation software is used for constructing a 17-degree-of-freedom running transverse oscillatory optimization design simulation model, unevenness in the rail direction and unevenness in the horizontal direction serve as the input stimulus, the minimum oscillatory weighing acceleration root mean square value of transverse movement of a vehicle body serves as the design target, and therefore the optimal damping coefficient of the secondary transverse shock absorber of the low-speed rail vehicle is obtained through optimization design. It can be known through a design example and SIMPACK simulation verification that the accurate and reliable optimal damping coefficient value of the secondary transverse shock absorber can be obtained, and the reliable design method is provided for design of the optimal damping coefficient of the secondary transverse shock absorber of the low-speed rail vehicle. By means of the method, the design level of a suspension system of the low-speed rail vehicle can be obviously improved, and the running safety and stability of the vehicle are improved.