载荷力对带间隙平面多体系统动力学特性的影响

IF 2.8 3区工程技术 Q2 MECHANICS

International Journal of Non-Linear Mechanics Pub Date : 2025-07-03 DOI:10.1016/j.ijnonlinmec.2025.105202

Xin Fang , Jianghao Wu , Feng Du

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引用次数: 0

摘要

机构承受各种类型的载荷。然而，载荷类型和大小对机构动力特性的影响尚不清楚。通过理论建模和实验方法，研究了载荷力对带间隙平面机构动态特性的影响。结合基于Lankarani-Nikravesh模型和修正的Coulomb模型的接触力模型，利用拉格朗日乘数法建立了带间隙机构的动力学模型。对曲柄滑块机构进行了动力学分析，揭示了该机构随着力的增大由混沌行为向周期行为转变。研究结果表明，在不同的载荷、力形式、参数条件和拓扑结构中，结构具有普遍的特性。对带间隙连杆的多连杆机构进行了实验验证，结果与理论预测吻合较好。将球面冲击模型与带间隙的曲柄滑块机构进行了对比分析，分别分析了载荷类型和载荷大小对冲击模型的影响。这一发现强调了载荷力在确定带间隙平面多体系统动态特性中的关键作用，为设计不同载荷条件下的机械系统提供了有价值的见解。

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Load force effect on the dynamic characteristics of planar multibody systems with clearances

Mechanism bears various types of loads. However, the effect of load type and magnitude on the dynamic characteristics of mechanism is less clear. This study investigates the effect of load force on the dynamic characteristics of planar mechanisms with clearance through theoretical modeling and experimental method. The dynamic model of mechanism with clearance is formulated utilizing the Lagrange multiplier method, incorporating a contact force model based on the Lankarani-Nikravesh and modified Coulomb models. Dynamic analysis of a slider-crank mechanism is conducted, revealing a transition from chaotic to periodic behavior with increasing force magnitude. The findings demonstrate the universal behavior across different load force forms, parametric conditions and topological configurations. Experimental validation is conducted on a multi-link mechanism with clearance joints and shows good agreement with theoretical prediction. A comparative analysis between a ball-plane impact model and the slider-crank mechanism with clearance is performed and the effect of load type and magnitude is analyzed respectively. This finding highlights the critical role of load force in determining the dynamic characteristics of planar multibody systems with clearances, offering valuable insights for designing mechanical systems under diverse load conditions.

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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.