Characteristic Analysis And Ride Comfort Optimization Of Damping System For Cargo Vehicles

This paper first introduces the definition,composition and classification.of the damping systems for cargo vehicles as well as the current development status at home and abroad.According to the theories related to cargo vehicles,two levels of pavement roughness are selected.The parameters obtained by integrating white noise are taken as random road input to establish an eight-degree-of-freedom mechanics model of vehicle vibration.The differential equations of motion of the system is derived by using the second type of Lagrangian equation.The mechanical model of the damping system of the cargo vehicles is set as a constant coefficient linear system through necessary assumptions.Based on the mass,elasticity and damping required by the system,the generalized force of the system is derived by the virtual displacement theorem.Then integrate the mechanical model into a mathematical model and simplify its structure.The simulation program of the model is established by using the Simulink module in Matlab.A truck is taken as an experimental vehicle,whose structure parameters are substituted into the simulation program,and the response of its damping system to the two levels of road input is simulated to obtain the corresponding results.By using the optimization design method,the parameters of the vertical acceleration of the vehicle body,such as the root mean square value,are chosen as the optimization targets to optimize the stiffness and damping of the truck’s suspension.The simulation program is applied to perform the final simulation,which is aimed to confirm the feasibility of the optimization results.Finally,make a comprehensive analysis of the overall vibration of the truck.From the simulation results,it can be found that the vibration of the truck’s body is significantly improved under the input of the two kinds of road parameters.Therefore,the method that is put forward in this paper can be used to analyze the characteristics of the damping system and optimize the ride comfort of cargo vehicles,which will guide the analysis of the vibration damping system and the improvement of the performance of cargo vehicles in the future.