Investigation on effect of joint clearance on dynamics of four-bar mechanism

Erkaya, Selçuk; Uzmay, İbrahim

doi:10.1007/s11071-009-9470-7

Cited by 127 publications

(62 citation statements)

References 29 publications

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“…Over the last few decades, a number of researchers have proposed various methodologies for modeling mechanisms with clearance joints [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]. However, most of these studies only deal with numerical models.…”

Section: Introductionmentioning

confidence: 99%

Numerical and experimental investigation on multibody systems with revolute clearance joints

et al. 2010

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A comprehensive combined numerical and experimental study on the dynamic response of a slider-crank mechanism with revolute clearance joints is presented and discussed in this paper to provide an experimental verification and validation of the predictive capabilities of the multibody clearance joint models. This study is supported in an experimental work in a test rig, which consists of a slider-crank mechanism with an adjustable radial clearance at the revolute joint between the slider and the connecting rod. The motion of the slider is measured with a linear transducer and an accelerometer.Dynamic tests at different operating crank speeds and with several clearance sizes are performed. The maximum slider acceleration, associated with the impact acceleration, is used as a measure of the impact severity. The obtained results demonstrate the dynamical behavior of a multibody mechanical system with a clearance joint. Finally, the correlation between the numerical and experimental results is presented and discussed leading to validated models of clearance revolute joints.

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Section: Introductionmentioning

confidence: 99%

Numerical and experimental investigation on multibody systems with revolute clearance joints

et al. 2010

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“…The motivation for this research work comes from current interest in developing mathematical and computational tools for the dynamics of multibody systems in which the effects of clearance, surface compliance, friction and lubrication in real joints are taken into account [1][2][3][4][5][6]. These phenomena can be included in a multibody system with a spherical joint, and in many applications the function of the mechanical systems strongly depends on them.…”

Section: Introductionmentioning

confidence: 99%

Spatial rigid-multibody systems with lubricated spherical clearance joints: modeling and simulation

2009

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The dynamic modeling and simulation of spatial rigid-multi-body systems with lubricated spherical joints is the main purpose of the present work. This issue is of paramount importance in the analysis and design of realistic multibody mechanical systems undergoing spatial motion.When the spherical clearance joint is modeled as dry contact; i.e., when there is no lubricant between the mechanical elements which constitute the joint, a body-to-body (typically metal-tometal) contact takes place. The joint reaction forces in this case are evaluated through a Hertzian-based contact law. A hysteretic damping factor is included in the dry contact force model to account for the energy dissipation during the contact process. The presence of a fluid lubricant avoids the direct metal-to-metal contact. In this situation, the squeeze film action, due to the relative approaching motion between the mechanical joint elements, is considered utilizing the lubrication theory associated with the spherical bearings. In both cases, the intrajoint reaction forces are evaluated as functions of the geometrical, kinematical and physical characteristics of the spherical joint. These forces are then incorporated into a standard formulation of the system's governing equations of motion as generalized external forces. A spatial four bar mechanism that includes a spherical clearance joint is considered here as example. The computational simulations are carried out with and without the fluid lubricant, and the results are compared with those obtained when the system is modeled with perfect joints only. From the general results it is observed that the system's performance with lubricant effect presents fewer peaks in the kinematic and dynamic outputs, when compared with those from the dry contact joint model.

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“…Thus, the main focus is to build a force model which takes into account the material, velocity, and deformation of collision bodies. This approach was studied by many researchers [11,12].…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Dynamics Response of a Planar Mechanism with Two Driving Links and Prismatic Pair Clearance

Marghitu

Zhao

2017

Mathematical Problems in Engineering

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The influence of the joint clearance on the dynamic response of a planar mechanism with two driving links and prismatic pair clearance is investigated under variable input speeds of the system. The simulation model was built with a nonlinear impact model. The normal contact force is characterized by Hertz contact theory and an energy dissipation term. A tangential friction force is involved in the simulation model based on Coulomb's friction law. The simulation results indicate that the largest Lyapunov exponents are dependent on the clearance size and the input speed.

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Investigation on effect of joint clearance on dynamics of four-bar mechanism

Cited by 127 publications

References 29 publications

Numerical and experimental investigation on multibody systems with revolute clearance joints

Numerical and experimental investigation on multibody systems with revolute clearance joints

Spatial rigid-multibody systems with lubricated spherical clearance joints: modeling and simulation

Nonlinear Dynamics Response of a Planar Mechanism with Two Driving Links and Prismatic Pair Clearance

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