A Model Based On Virtual Proving Ground Shock Absorber Fatigue Life Prediction And Parameter Optimization

Auto industry development up to now,gradually mature technology,increasingly f ierce competition.major car compaines aslo pay more and more attention to the parts and the fatigue life of the assembly. When the traditional fatigue life prediction is usua lly the actual road test site method is adopted to pretict the fatigue life of vehicle com ponents and assembly.But this method test time consuming,cost. Vehicle shock absorb er harshnessNVHof vehicle and passenger safety performance has an important influe nce.In order to shorten the test cycle,save resources,this article adopts the method of v irtual proving ground at the beginning of the vehicle design for virtual fatigue life pre diction of vehicle shock absorber.In this paper,considering the actual situation of our country's traffic road,Hainan tropical test pavement through scanning, calculated according to the national standard GB7301-86and GB/T12678-90specified in the use of the method of harmonic superposition principle write virtual fatigue durability test road power spectrum.Through MATLAB software will become a computer analysis of the principle of wraving and ADAMS software need information of pavement, and to establish a complete virtual fatigue durability testing ground road model; Considering some nonlinear factors in the vehicle under the condition of the finite element model of vehicle system is established in this paper. According to Hainan tropical test fatigue durability test specification for virtual vehicle fatigue durability test of virtual and actual vehicle wheels,comparing the six component to verify the exactness of the model.In the case of shock absorber virtual finite element model.Through the force anaysis of the fatigue weakness in judgment under the spring seat and spring.Because out of shock absorber are motivated by the road and the possibility of a total shock according to the practical work of shock absorber after the boundary conditions under the virtual simulation analysis for spring and spring by virtual load, In the nCode Glyph Works software analysis to calculate the shock absorber in the correct virtual fatigue life.Under the definition of shock asborber spring seat under the grooves,the addition of length width and spring seat thickness in order to optimize the design of tatget vatiable.Shock bsorbet virtual fatigue life of Kriging model is established to determine the change of these parameters and calculate the corresponding fatigue life,Finally by analyzing Isight software out of the shock absorber of the optimal structural parameters of the fatigue life.