面向平稳性提升的跨座式单轨车辆走行轮系与悬挂系统参数匹配优化OA

To enhance the vertical ride comfort of straddle monorail vehicle under speed-increase conditions,the parameter matching optimization was conducted on the running wheel system and suspension system.The orthogonal experimental design and the variance analysis were employed to clarify the sensitivity of various parameters to the vertical ride comfort of monorail vehicle,and the main influencing factors were screened out.Taking the root-mean-square value of vertical acceleration as optimization objective,the collaborative optimization of the running wheel system and suspension system parameters was achieved based on the multidisciplinary platform of modeFRONTIER and Adams by the second-generation improved genetic algorithm.The results show that the vertical ride comfort of the vehicle is significantly improved after parameter optimization.According to the"Specification for Dynamic Performance Assessment and Test Verification of Railway Vehicles"(GB/T 5599-2019),the ride indices at measuring points of A and B are increased by 14.5％and 9.7％,respectively.The vertical ride index values at all measured points are below 2.5 after optimization,reaching the"Excellent"grade specified in the standard.The dynamic performance evaluation confirms that the optimized vehicle fully meets the requirements under speed-increase conditions.