Research On The Optimization Design Of Car Ride Comfort Based On The Joint Finite Element Simulation

With the economic growth and the improvement of road traffic environment,the total demand for car products in modern society has increased dramatically,and more attention has been paid to the comfort and comfort of vehicles.At present,there is a large optimization space for the ride comfort of most low and mid-range cars.Considering the complexity of the influencing factors,using computer simulation technology to implement the ride comfort optimization design is the main method in the early stage of development.Study the theory and practical key technologies in the fields of multi-body dynamics and computer application,and deeply analyze the structural characteristics of the target model ’s suspension,tires,and other assemblies of the driving system.establish the main assembly of the vehicle in the software ADAMS,and build the model of each subsystem.Combined with the load-bearing and dynamic characteristics of the suspension,the key components of the front and rear suspension are flexible treated and verified by the finite element mesh function;It is introduced to ADAMS/Car replace the front and rear suspension rigid lower arm of the target vehicle,and establish the corresponding rigid flexible coupling system model of the vehicle;The sine sweep excitation simulation is carried out between the built model and the software system vehicle model to verify the rationality of the vehicle model.In the ADAMS/Car standard interface environment,the front suspension doublesided wheels are subjected to the same-direction excitation simulation dynamic test.According to the simulation result curve,the actual parameters of the prototype vehicle are compared to verify the compliance degree;Design and conduct a real vehicle doubleskateboard side-slip experiment,collect the front beam value and side-slip amount of the sample vehicle;use the principle of regression analysis to statistically process the experimental data,and the wheel side slip amount is taken as the control amount to obtain Optimization matching value of steering wheel positioning parameters;adjust the relevant size parameters to establish an optimized rigid-flexible coupling model of the front suspension.The disturbance of key factors is obtained by design optimization test,and the structural dimension parameters of the front suspension are adjusted to establish the optimal rigid flexible coupling model of the front suspension;Import in ADAMS/Car and replace the prototype,and complete the assembly of the optimized rigid and flexible coupling model of the whole vehicle.Study the technical standards of the ride comfort evaluation system,determine boundary conditions such as road surface and driving conditions,and conduct simulation experiments for ride comfort evaluation tests in the ADAMS/Car Ride environment.The results show that,compared with the original vehicle model,the total weighted acceleration of the driver’s center of mass of the optimized vehicle model is reduced by 3%,the vertical dynamic load of the tire is reduced by 8.81%,and the ride comfort of the target vehicle model is improved.