Abstract
To improve comfort, a nonlinear suspension system is proposed on the basis of the nonlinear vibration isolation theory and the installation space of the cab suspension system for trucks. This system is suitable for all-floating cabs. For easy matching and design, the static and stability characteristics of the suspension system were analyzed, respectively, and the boundary condition for the stability of the system was given. Moreover, the cab simulation model was established, and the dynamic simulation was conducted. The stability analysis shows that the smaller the vibration excitation of the cab system, the higher its stability is. The dynamic simulation results show that the acceleration of the cab with the nonlinear suspension system is effectively suppressed; the dynamic deflection of the suspension is kept within a certain range, and the design space of the suspension stroke can be effectively utilized. Compared with the traditional linear suspension system, the nonlinear suspension system has better vibration isolation characteristics and can effectively improve ride comfort.
Highlights
Transportation industry plays an important role in the national economy of any country
In order to improve vehicle comfort, some scholars have adopted active or semiactive control methods [9, 10], but they have not been applied in practice for many years. If their stiffness is larger, the ride comfort will be worse; if their stiffness is smaller, the suspension deflection will be larger. e high static stiffness and low-dynamic stiffness suspension is an effective solution to the above contradictions. e design of many systems involves stability issues [11, 12]
Previous studies have mostly focused on the form, principle, and characteristics of the quasi-zero-stiffness isolators and rarely applied them to the cab vibration isolation system
Summary
Transportation industry plays an important role in the national economy of any country. E common coil springs or rubber springs are usually used in the suspension system of the cab for ordinary vehicles Their high dynamic stiffness and poor lowfrequency vibration isolation result in poor ride comfort. Zhou et al [16] analyzed the nonlinear dynamic characteristics of a quasi-zero-stiffness vibration isolator. Xu et al [20] designed a low frequency vibration isolator with quasi-zero-stiffness characteristics by using the magnetic spring. Carrella et al [21] designed a vibration isolation system with high static stiffness and low dynamic stiffness by combining the linear spring and the magnet spring. Previous studies have mostly focused on the form, principle, and characteristics of the quasi-zero-stiffness isolators and rarely applied them to the cab vibration isolation system. Its static and stability characteristics were analyzed, respectively. e simulation model of the truck cab was established by using MATLAB software, and the comfort simulation was carried out
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