Numerical study of parametric effects on the dynamic response of planar multi-body systems with differently located frictionless revolute clearance joints

Abstract. In machines and mechanisms, most of the clearance joints are designed to operate with lubricant fluid, which is an effective way of ensuring better performance of the mechanical systems. The differently located lubricated joints interact with each other, influencing the total performances of the mechanical system. In this study, a numerical coupling model for the dynamics and lubrication analyses of the multibody system with multiple lubricated clearance joints is established. This approach couples the dynamics model of the multibody system with the lubrication models of translational and revolute clearance joints. The dynamics model is established by the Lagrange's method, while The lubrication models are solved using the finite element method. The hydrodynamic forces built up by the lubricant fluid are evaluated from the motion states of the system and then input into dynamics model of the multibody system. Finally, the proposed approach is applied to a four-stroke gasoline engine with the lubricated piston skirt-liner subsystem and lubricated bearing at the big end of the connecting rod.

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“…Combining Eqs. (34) and (35), the dynamics equations of a system subjected to constraints can be stated in the form [1,[27][28][29][30][31]: …”

Section: Asperity Contact Forcesmentioning

confidence: 99%

A numerical coupling model for a multibody system with multiple lubricated clearance joints

Zhao

Shen

2017

MATEC Web Conf.

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“…Muvengei et al [36] studied the effects of clearance size and input crank speed on the dynamic response of a typical plane crank-slider mechanism with two revolute clearance joints. From the phase portraits of the slider velocity and acceleration, it could be concluded that the chaotic or periodic dynamic response not only depends on the clearance size and the operating speed, but also relates to the location of clearance joints.…”

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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“…Flores et al [2] extensively investigated the kinematic and dynamic characteristics of multibody systems with clearance joints. Muvengei et al [3] investigated the effects on the dynamic responses of a mechanical system by the location of the clearance, the clearance size and the operating speed. In addition to the rigid multibody mechanical systems, numerical and experimental studies of the partly compliant mechanism were carried out by Erkaya and Dogan [4] and Erkaya et al [5].…”

Section: Introductionmentioning

confidence: 99%

Vector form intrinsic finite element method for planar multibody systems with multiple clearance joints

2016

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A new computational methodology is presented for the dynamic analysis of multibody systems with multiple clearance joints by vector form intrinsic finite element method. A joint model is developed to simulate the motion of ideal and clearance joints for multibody systems. The dynamic behaviour of a four-bar mechanism with three clearance joints in continuous contact mode is analysed. The results show that the dynamic performance of the mechanism with three clearance joints in continuous contact mode is not similar to that with ideal joints and is fluctuating and affected by the clearance size of the joints and input crank speed.

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Numerical study of parametric effects on the dynamic response of planar multi-body systems with differently located frictionless revolute clearance joints

Cited by 101 publications

References 38 publications

A numerical coupling model for a multibody system with multiple lubricated clearance joints

A numerical coupling model for a multibody system with multiple lubricated clearance joints

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

Vector form intrinsic finite element method for planar multibody systems with multiple clearance joints

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