Ride Comfort Simulation And Suspension Parameters Optimization Of A B-class Car

Ride comfort is an important factor to the driving experience,improve vehicle ride comfort can effectively reduce driving fatigue,to prevent damage to the goods and reduce the wear and tear of automotive parts;bad ride comfort will limit the vehicle’s handling stability and Fuel economy and even be harm to driving safety.In recent years,the domestic car flourish gradualy,domestic cars occupy a large share of the automotive market,many automakers take it as an important issue for research and development to improve vehicle ride.At the same time,consumers concerned about the vehicle dynamics and handling stability,while pay more and more attention to ride comfort as an important indicator of the purchase.So to improve vehicle ride comfort is particularly important in the vehicle design.Based on the multi-rigid body dynamics analysis theory and software,this paper analyzes the whole vehicle structure of a Chinese-made B-Class sedan and builds a complete vehicle including the body,front and rear suspension,front and rear tires,steering system and powertrain in ADAMS.And random white noise method is used to generate random asphalt pavement.The random input and impulse input are simulated in ADAMS/Car module.Confirming the evaluation method of ride comfort and evaluating the property of ride comfort finally.Studing the influence of suspension stiffness and damping coefficient on the vibration of the vehicle body;Finally,take the approximate D-optimal design method as the test optimization method,and the stiffness and damping coefficient of the suspension are taken as the design variables,To optimize the stiffness and damping coefficient of the front and rear suspension of the vehicle under the goal of the vertical weighted acceleration of the seat surface,and the simulation results show that the vehicle ride comfort is improved significantly after optimization.