Research on rigid-flexible coupling nonlinear dynamics of light commercial vehicle considering frame flexibility

IF 3.4 3区工程技术 Q2 MECHANICS International Journal of Non-Linear Mechanics Pub Date : 2025-03-01 Epub Date: 2024-11-05 DOI:10.1016/j.ijnonlinmec.2024.104949

Shuai Mo , Keren Chen , Yingxin Zhang , Yuansheng Zhou , Liangyuan Lyu , Bowei Yao , Wei Zhang

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Abstract

Commercial vehicles play a vital role in the transportation industry. Generally, there will present a complex nonlinear dynamic behavior composed of periodic, quasi-periodic, and even chaotic vibration in vehicle vertical system under the continuous speed bump excitation. To explore the nonlinear dynamic behavior of vehicle system, a new rigid-flexible coupling nonlinear dynamic model for light commercial vehicle has been developed theoretically with considering the frame flexibility, suspension stiffness and damping nonlinearity, and rubber bushing nonlinearity. The dynamic model for frame and suspension have been developed with discrete element method and lumped mass method, respectively. Then, the flexible frame model has been verified through the mode shape and frequency calculated by finite element simulation. And the rigid-flexible coupling nonlinear dynamic model of a light commercial vehicle has been verified with Adams simulation and testing results. Furthermore, the influence of vehicle speed and the height of speed bump, suspension stiffness and damping, as well as cargo weight and distribution on vehicle system dynamics is analyzed with bifurcation diagram, time history, frequency, phase diagram and Poincare section. The results show the significant and complex effects on the nonlinear vibration of vehicle system, especially the nonlinear damping and the flexible frame.

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考虑车架柔性的轻型商用车刚柔耦合非线性动力学研究

商用车在运输行业中起着至关重要的作用。在连续减速带激励下，车辆垂直系统通常会表现出由周期、准周期甚至混沌振动组成的复杂非线性动力行为。为了研究车辆系统的非线性动力学行为，从理论上建立了轻型商用车刚柔耦合非线性动力学模型，考虑车架柔性、悬架刚度和阻尼非线性以及橡胶衬套非线性。分别用离散元法和集中质量法建立了车架和悬架的动力学模型。然后，通过有限元仿真计算的模态振型和频率对柔性框架模型进行了验证。用Adams仿真和试验结果验证了轻型商用车刚柔耦合非线性动力学模型的正确性。利用分岔图、时程图、频率图、相位图和庞加莱剖面分析了车速和减速带高度、悬架刚度和阻尼、货物重量和分布对车辆系统动力学的影响。结果表明，非线性阻尼和柔性车架对车辆系统非线性振动的影响是显著而复杂的。

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来源期刊

International Journal of Non-Linear Mechanics 物理-力学

CiteScore

5.50

自引率

9.40%

发文量

192

审稿时长

67 days

期刊介绍： The International Journal of Non-Linear Mechanics provides a specific medium for dissemination of high-quality research results in the various areas of theoretical, applied, and experimental mechanics of solids, fluids, structures, and systems where the phenomena are inherently non-linear. The journal brings together original results in non-linear problems in elasticity, plasticity, dynamics, vibrations, wave-propagation, rheology, fluid-structure interaction systems, stability, biomechanics, micro- and nano-structures, materials, metamaterials, and in other diverse areas. Papers may be analytical, computational or experimental in nature. Treatments of non-linear differential equations wherein solutions and properties of solutions are emphasized but physical aspects are not adequately relevant, will not be considered for possible publication. Both deterministic and stochastic approaches are fostered. Contributions pertaining to both established and emerging fields are encouraged.