| With the development of the automobile industry and the increase in people's requirements for automobiles,more and more attention has been paid to automobile safety and smoothness.Suspension,as an important part of the automobile chassis,connects the tire and the body,mitigates the i MPact vibration from the ground,transmits force and torque,and directly affects the safety and ride comfort of the vehicle.As a traditional independent passive suspension,Macpherson suspension is widely used in automobiles because of its simple structure,low price,and low space occupation.Due to the arrangement of the steering mechanism in the front suspension of the car,the front suspension is required to occupy a small space,and the advantages of the Macpherson suspension are well reflected.The structure of the Macpherson suspension makes the shock absorber subject to lateral force.The shock absorber is subjected to reciprocating side force for a long time,which will cause the shock absorber to leak oil,the guide sleeve and oil seal assembly wear,and the shock absorber will be different Ringing,bending of the piston rod,etc.Optimizing the lateral force of the shock absorber for Macpherson suspension is of great significance for improving the life of the shock absorber,driving safety and smoothness.This article takes the front Macpherson suspension of a car as the research object,and carries out the matching design of suspension shock absorber and the optimization of lateral force.This article firstly carried out the matching,calculation and initial design of the Mc Pherson front suspension according to the parameters of a certain vehicle provided by the enterprise,and analyzed the structure and characteristics of the Mc Pherson suspension shock absorber.Secondly,according to the Mc Pherson three-dimensional model,the key point hard point information is measured,and the hard point information is used to establish the Mc Pherson front suspension and vehicle model in the ADAMS/CAR dynamics software to verify the correctness of the model.On the basis of the different lateral forces under different working conditions of the Mc Pherson suspension shock absorber,the two-wheel same-hop 100 mm sinusoidal excitation simulation of the Mc Pherson suspension model and the random road conditions of the vehicle model were carried out.Multi-body dynamics simulation in pit pavement conditions,i MPact stone pavement conditions,and cornering conditions.From the results(the maximum load information on the fulcrum of the shock absorber),the maximum lateral force of the Mc Pherson suspension shock absorber is determined.The operating conditions are turning conditions.Next,based on the analysis of the force and failure form of the Mc Pherson suspension damper,the two parts that are most affected by the lateral force of the Mc Pherson suspension damper are the oil storage cylinder and the piston rod.The load information is subjected to finite element simulation of the oil storage cylinder and piston rod in the ABAQUS finite element software,and the force and deformation are analyzed.Finally,the optimization plan was determined,starting from the two aspects of the damper assembly structure and the design of the C-shaped spring,to optimize the lateral force of the Mc Pherson suspension damper.Establish the combination of Isight and ABAQUS,establish a C-shaped spring suspension and vehicle model,and co MPare the lateral force with the ordinary spring suspension and vehicle model under the above multiple working conditions.The results show that the C-shaped spring vehicle has a 30% reduction in the lateral force of the Mc Pherson suspension shock absorber co MPared to the ordinary spring vehicle,indicating that the C-shaped coil spring has good resistance to the lateral force of the shock absorber.On the premise of not changing the structure of the suspension,the performance of the suspension is improved to a certain extent,which has certain practical significance in engineering. |
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