Optimization of impact stability behavior parameters of metro vehicle planning type anti-climbing energy absorption structure
To enhance the stability and resistance of metro vehicles in collisions,a planning-type anti-climbing energy absorption structure was proposed.This kind of structure was widely used in the end energy absorption structure of metro vehicles due to its strong resistance to lateral loads and compact structure.Taking the planning-type anti-climbing device of a certain type of metro vehicle as the research object,a symmetrical simplified model of the energy absorption structure was established using finite element simulation,and the accuracy of the finite element model was verified by combining it with the test data of the trolley impact.Through numerical simulation,the planer's face angle(α),back angle(β)and width(w)and planning depth(d)were used as the input variables.The energy absorption(EA)and mean planning force(MPF)of the energy absorbing stage were used as durability indicators,and the sample variance(S2)was used as the reference for assessment.The input variables were parameterized and analyzed by the Taguchi method.On this basis,a surrogate model was constructed using radial basis function,and the main design parameters of the energy absorption structure were optimized by the multi-objective genetic algorithm(MOGA)to determine the best configuration of the structural parameters.The research results show that the influence of β on EA,MPF,and S2 is not obvious,while α is negatively correlated with MPF and EA,but positively correlated with S2.w and d are positively correlated with EA and MPF,but negatively correlated with S2.The optimal design scheme of the energy absorption structure obtained by optimization design is:d is 3.94 mm,α is 7.78°,and w is 34 mm.The EA and MPF of the optimal design scheme increased by 5.91％ and 5.89％,respectively,while S2 decreased by 45.4％.The durability and stability of the energy absorption structure were improved.The research results provide engineering reference for the design of planning-type anti-climbing energy absorption structures of metro vehicles.
metro vehicleplanning type anti-climbing devicetrolley experimentcrashworthinessstationaritymulti-objective optimization
万方数据
维普
