Analyze The Suspension For Movement Performance And The Suspension Arm Optimization Of A Passenger Car

Automobile suspension system is the general term that describes assembly partswhich connect automobile suspension plasmids and the suspension plasmids, it playsan important role in bearing, forcing (moment),buffering,failure mode, can spreadingand adjusting their own car body. The pros and cons of the automobile suspensionsystem performance will decide not only the vehicle ride comfort and handlingstability, but also the automobile power performance of the play. And it will alsoaffect the safety of the suspension parts and service life. Considering the movementrelationship and dynamics in suspension system components is very complicated,traditional calculation method can’t accurate analysis the performance of suspensionsystem parameters.This paper comparatively detailed introduced the theory ofmulti-body dynamics, finite element theory and the structure optimization designmethod (topology optimization) these three, By applying the theory of multi-bodydynamics and virtual prototyping technology to the simulation optimization analysisof wheel alignment parameters, combined with finite element analysis and structureoptimization design method for the analysis of the design of suspension swing armartifacts. Follow focuses on the content be summarized as the following aspects:(1) The model of the double wishbone independent suspension torsion bar typeis established in professional module of ADAMS/CAR which based on themulti-body dynamics theory, and to test suspension system model for parallel doublebeat simulation; Then regarding wheel positioning parameters (wheel toe angle,camber angle, kingpin caster angle and dip angle) as the optimization goal, andregarding the hard point coordinate values of suspension model as the designvariables to optimize the design by using ADAMS/insight module, so that thesuspension parameter curves are in the permitted range; Getting to choose theappropriate load method, and deduces the formulas for the tire ground load, UsingADAMS load simulation model of optimized suspension to extract the suspensionload swing arm;(2) The finite element analysis model is designed and established by suspension arm based on the finite element analysis method in the Hyper Works software, andload analysis swing arm are to get the maximum stress value of97.4is less than theallowable stress, The low order natural frequency value of671.1is less than in the carall kinds of excitation frequency, which ensures the safety of the suspension arm;(3)Optimizing the suspension swing arm topology in many conditions onaccount of the weighted compromise programming and multi-objective (stiffness andnatural frequencies) of topology optimization model, Choosing relative densitycontours of0.15modification design optimization results as a reference model toimprove the design (based on the processing technology and the manufacturing costto improve), And comparing the changes of strength, stiffness, natural frequency, andquality before and after the optimization of the swing arm, Although strength isbigger, stiffness decreases and the inherent frequency is also reduced, and it still onthe design of the allowed range, finally it has lost16.33%weight, and achieved thepurpose of the swing arm lightweight...