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Comparison and analysis of two Coulomb friction models on the dynamic behavior of slider-crank mechanism with a revolute clearance joint

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Applied Mathematics and Mechanics(English Edition) 2018年第9期39卷 1239-1258页

作者： Xudong ZHENG Runsen ZHANG Qi WANG School of Aeronautic Science and Engineering Beihang University

The objective of this study is to investigate the effects of the Coulomb dry friction model versus the modified Coulomb friction model on the dynamic behavior of the slider-crank mechanism with a revolute clearance joint. The normal and tangential forces acting on the contact points between the journal and the bearing are described by using a Hertzian-based contact force model and the Coulomb friction models, *** dynamic equations of the mechanism are derived based on the Lagrange equations of the first kind and the Baumgarte stabilization method. The frictional force is solved via the linear complementarity problem(LCP) algorithm and the trial-and-error ***, three numerical examples are given to show the influence of the two Coulomb friction models on the dynamic behavior of the mechanism. Numerical results show that due to the stick friction, the slider-crank mechanism may exhibit stick-slip motion and can balance at some special positions, while the mechanism with ideal joints cannot.

关键词： revolute clearance joint slider-crank mechanism stick friction stick-slip linear complementarity problem(LCP)

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Dynamics of luffing motion of a hydraulically driven shell manipulator with revolute clearance joints

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Defence Technology（防务技术） 2022年第4期18卷 689-708页

作者： Chen Zhi-qun Qian Lin-fang Chen Guang-song Nie Shou-cheng Yin Qiang Yue Cai-cheng School of Mechanical Engineering Nanjing University of Science and TechnologyNanjing210094China Northwest Institute of Mechanical and Electrical Engineering Xianyang712099ShaanxiChina China North Industry Corporation Beijing100053China

In this study,a modeling method for investigating the dynamic characteristics of a hydraulically driven shell manipulator with revolute clearance joints is *** model accounts for the effect of the clearance,the flexibility of the rotating beam,and the coupled dynamic characteristics of the hydraulic cylinder.A modified contact force model was developed to simulate the physical properties of realistic revolute joints with small clearances,heavy loads,and variable contact stiffnesses and damping coefficients with variations of the *** the strong coupling relationship between the hydraulic cylinder and the flexible beam,a system equation of motion combining the state variables of the hydraulic cylinder and mechanical system was *** complex nonlinear friction force of the hydraulic cylinder motion was constructed using a modified Lu Gre model,and the parameters of the friction model were identified using intelligent identification ***,a test system for the shell manipulator was established to achieve experimental ***,the effects of the clearance size and the stiffness of the cylinder support on the dynamic response were investigated.

关键词： Parameter identification Shell manipulator Hydraulic cylinder revolute clearance joint

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维普期刊数据库

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An improved practical model for wear prediction of revolute clearance joints in crank slider mechanisms

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Science China(Technological Sciences) 2013年第12期56卷 2953-2963页

作者： LI Pei CHEN Wei ZHU AiBin Key Laboratory of Education Ministry for Modern Design and Rotor-Bearing System Xi’an Jiaotong University

A stationary clearance link algorithm(SCLA)for calculating the reaction-force of revolute clearance joints in crank slider mechanisms is proposed in this *** SCLA is more efficient than other algorithms of the same ***,based on the Winkler foundation model,an unsymmetrical Winkler foundation model and a double elastic layer Winkler model are *** integrating a dynamic model and the unsymmetrical Winkler foundation model with Archard wear model,an improved integrated wear prediction model is also generated.A series of experiments have been performed to compare with the predicted analysis data,and the results showed a good *** a real industry application,with the double elastic layer Winkler model,the integrated wear prediction model was successfully used to predict the wear depth of the joint bearing(bimetallic bearing)for the cantilever crane of a concrete pump truck of Sany Heavy Industry.

关键词： revolute clearance joint stationary clearance link algorithm unsymmetrical Winkler foundation model double elastic layer Winkler model

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