Abstract
In order to study the influence of heavy truck dynamic parameters on the vehicle’s ride comfort under the random road excitation, the weighted RMS (root-mean-square) acceleration responses of the vertical driver’s seat and cab pitch angle are chosen as objective function, a dynamic model of the vehicle with 10 degrees of freedom is established to simulate and analyze the results. The influence of different parameters of all the suspension systems of the vehicle, such as the stiffness and damping of the suspensions of the seat, cab, vehicle, and wheel, on the vertical driver’s seat and cab pitch angle are respectively analyzed. The study results show that the influence of the stiffness and damping parameters in the suspension systems on the vehicle ride comfort is very obvious. The vehicle’s ride comfort changes worse with the increase of the suspension stiffness and the reduction of the suspension damping, and vice versa. The study proposes an optimal range of the stiffness and damping parameters for the optimal design and control of the vehicle suspension systems, concurrently, the study can also provide a theoretical basis for the suspension system designed for heavy trucks.
Highlights
Nowadays, the heavy truck market has increasingly higher performance requirements for vehicles
The previous researchers often use the half-vehicle, the full vehicle dynamic models, or the multi-body dynamic models to research the vibration of the vehicle
When heavy trucks traveling on random road surfaces, the excitation vibration could impact the vehicles cause the driver to feel uncomfortable, fatigued, and even cause occupational diseases such as spinal deformities and stomach problems
Summary
The heavy truck market has increasingly higher performance requirements for vehicles. The excitation vibrations of the simulation model are measured through road tests, and the weighted RMS acceleration is used as the objective function These studies only consider the effect of the cab suspension parameters on the vertical vibration. It not fully reflects the influence of the vibration on the driver’s ride comfort on the different roads. The research results showed that the cab shaking has a great impact on the driver’s ride comfort and physical health To solve this problem, a dynamics model of heavy trucks with 10 degrees of freedom was established in this paper. The research results can provide a based design for the vehicle dynamics system
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