Nonlinear Dynamics and Analysis of a Planar Multilink Complex Mechanism with Clearance

Chen, Xiulong; Jiang, Shuai; Deng, Yu; Wang, Qing

doi:10.1155/2018/6172676

Cited by 9 publications

(3 citation statements)

References 30 publications

(31 reference statements)

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“…Conversely, the velocity, acceleration, and reaction force curves obtained from the two simulation models show great differences. Compared with the case that only flexible links exist, dramatic oscillations are introduced by joint clearance which can also be found in Chen et al's research [33]. It means that joint clearance has greater effects on the dynamic responses of the mechanical system.…”

Section: Simulation Results With Clearance Jointsmentioning

confidence: 78%

A Study on the Dynamic Responses and Joints Clearance Optimization of the Planar Operating Mechanism of High‐Voltage Circuit Breaker

et al. 2019

Shock and Vibration

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The operating mechanism is responsible for a large part of machinery faults of high-voltage circuit breaker, which plays a crucial role in the reliability of the power grid. It consists of multiple flexible links connected by revolute joints with inevitable clearances between adjacent links. Flexible links and joints clearance have negative effects on the performance of the whole mechanical system. In this study, the dynamic simulation model of the multiple links articulated operating mechanism is built, and its validity is testified by operation experiment. Then, numerical simulation investigations are implemented to analyze the effects of flexible links and joints clearance on the dynamic responses of the operating mechanism. The results demonstrate that both flexible links and joints clearance exert associated negative effects on the mechanism performance. Furthermore, aimed at improving the dynamic characteristics of the operating mechanism, the joints clearance sizes are selected as design variables, and correlated optimization works are performed. After that, the acceleration and reaction force curves of the mechanical system become smoother, and the amplitudes of the two curves are reduced distinctly.

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Section: Simulation Results With Clearance Jointsmentioning

confidence: 78%

A Study on the Dynamic Responses and Joints Clearance Optimization of the Planar Operating Mechanism of High‐Voltage Circuit Breaker

et al. 2019

Shock and Vibration

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“…They concluded that the largest Lyapunov exponents are dependent on the clearance size and the input speed. Chen et al identified the chaos phenomenon of the 2-DOF nine-bar mechanism with a revolute clearance using the phase diagrams, the Poincaré portraits, and largest Lyapunov exponent parameter [8]. Bifurcation diagrams with changing clearance value, friction coefficient, and driving speed are drawn.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Dynamics Phenomenon in a Polydyne Cam with an Offset Flat Faced Follower Mechanism with Clearance

Yousuf¹

2023

Functional Calculus - Recent Advances and Development

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Nonlinear response of the follower motion is simulated at different cam speeds, different coefficient of restitution, and different internal distance of the follower guide from inside. The nonlinear response of the follower is employed to investigate the chaotic phenomenon in cam follower system in the presence of follower offset. The numerical results are done using SolidWorks software. The chaos phenomenon is detected using Poincare’ maps with phase-plane portraits, the largest Lyapunov exponent parameter, and bifurcation diagram. The largest Lyapunov exponent has a maximum values when the follower offsets to the right, while the largest Lyapunov exponent has a minimum values when the follower offsets to the left. The chaotic phenomenon in cam follower system when the follower offsets to the left is more than the chaotic phenomenon when the follower offsets to the right.

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“…The dynamic equations of motion were derived using generalized coordinates and the Lagrange method, and the effects of clearance size and driving speed on system bifurcation were investigated. Chen [13] utilized the KED method with the Lagrange method to establish a nonlinear dynamic model of a spatially parallel mechanism. The study showed the influence of various clearances on the parallel mechanism dynamics behavior, including chaos and bifurcation phenomenon, which provided a methodology for forecasting the dynamics behavior of parallel mechanisms with clearance and flexible links.…”

Section: Introductionmentioning

confidence: 99%

Dynamics Analysis and Chaos Identification of Compound Pendulum Jaw Crusher with Joint Clearance

2022

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A dynamic model of the working mechanism of a compound pendulum jaw crusher with clearance is established by the Lagrange multiplier method (LMD) based on the L-N contact force model and modified Coulomb friction force model. The correctness of the dynamic model is verified by MATLAB and Adams comparison simulation, and the best selection range of driving speed and clearance size is determined according to the laminating crushing theory (LCT). The effects of driving speed and clearance size on the shock and chaos phenomenon in the clearance mechanism are analyzed, as well as the vibration force applied to the foundation. The results show that, under the premise of meeting the requirements of crusher production capacity, increasing the driving speed and reducing the clearance size can weaken the shock and chaos phenomenon during the operation of the mechanism, improve the dynamic performance and enhance the operation stability, and the service life of foundation is prolonged with the stability of vibration force. Furthermore, the optimal combination of driving speed and clearance size is determined, which provides a theoretical basis for the optimization of the vibration force of the jaw crusher.

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Nonlinear Dynamics and Analysis of a Planar Multilink Complex Mechanism with Clearance

Cited by 9 publications

References 30 publications

A Study on the Dynamic Responses and Joints Clearance Optimization of the Planar Operating Mechanism of High‐Voltage Circuit Breaker

A Study on the Dynamic Responses and Joints Clearance Optimization of the Planar Operating Mechanism of High‐Voltage Circuit Breaker

Nonlinear Dynamics Phenomenon in a Polydyne Cam with an Offset Flat Faced Follower Mechanism with Clearance

Dynamics Analysis and Chaos Identification of Compound Pendulum Jaw Crusher with Joint Clearance

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