Stiffness Matching and Ride Comfort Optimization of Heavy Vehicle's Suspension Based on ADAMS

Abstract

In order to reasonably match suspension stiffness and realize the optimization of vehicle ride comfort, a time-domain virtual prototyping model of the 8×4 heavy vehicle is established based on dynamic software ADAMS, and its vertical vibration responses are simulated and analyzed on road level B. After that, an optimal design method for heavy vehicle’s suspension system is put forward. In this proposed method, the first, the second axle suspension stiffness and the balance suspension stiffness are taken as the optimal variables and the maximum values of Z-direction power spectral density (PSD) of the cab and cargo boxes mass center are chosen as the optimal target. By using SQP (Sequential Quadratic Programming) algorithms to conduct optimizing calculation, thus the optimal suspension stiffness parameters are obtained, which promotes and improves the heavy vehicle’s ride comfort.

Research and Improvement of the Hydraulic Suspension System for a Heavy Hydraulic Transport Vehicle

“…1a (20) where ∆V' is the changed volume of the gas in the accumulator, V 1a is the gas volume in the initial state, V 2a is the gas volume in the impact state, A is the area of the cylinder, k is the isentropic exponent of the gas, P a is the pressure of the accumulator at any moment.…”

“…When the vehicle is running with full load, the ride comfort standard of this special transport vehicle is such that the impact pressure of the suspension hydraulic cylinder is no more than 20 bar, and the height change of the vehicle platform should be less than 50 mm [20][21][22]. After the accumulator volume is set to 0.75 L, the pressure fluctuation curves of the suspension hydraulic cylinder are obtained under the different accumulator charging pressures, as shown in Figure 12.…”

“…When the vehicle is running with full load, the ride comfort standard of this special transport vehicle is such that the impact pressure of the suspension hydraulic cylinder is no more than 20 bar, and the height change of the vehicle platform should be less than 50 mm [20][21][22].…”

Analytical Design and Optimization of an Automotive Rubber Bushing

“…Zhou et al [7] optimized the basic parameters of a double suspension arm torsion bar for decreasing displacement of the suspension and limiting the frequency of impacting the stop block using a nonlinear multitarget optimizing tool box from MATLAB. Pang et al [8] carried out a ride comfort optimization of a heavy vehicle's suspension based on Adams, using a sequential quadratic programming method. Xu et al [9], based on the genetic algorithm and the fusion robustness analysis, performed an optimization of the stiffness of a powertrain mounting system in 6 DOF.…”

Damaged-aircraft trailer dynamics simulation and vibration optimization

“…The subsystem models such as suspension, tire, and body are built, and then the whole virtual model of DAT is assembled and simulated through the application of multi-body dynamics software. [4][5][6][7][8] A multi-axle heavy motorized wheel dump truck based on virtual and real prototype experiments integrating Kriging model is proposed in Gong et al, 9 but the approximate model doesn't contain tire and hydraulic parameters. In Michaltsos 10 a full mathematical vehicle model having 7 degrees of freedom (DOF) was developed.…”