Dynamic analysis and optimization design of a planar slider–crank mechanism with flexible components and two clearance joints

2016 ◽  
Vol 99 ◽  
pp. 37-57 ◽  
Author(s):  
Yuanyuan Li ◽  
Guoping Chen ◽  
Dongyang Sun ◽  
Yong Gao ◽  
Ke Wang
Keyword(s):  
Dynamic Analysis ◽  
Optimization Design ◽  
Clearance Joints ◽  
Crank Mechanism ◽  
Flexible Components

Wear Analysis of Two Revolute Joints With Clearance in Multibody Systems

2016 ◽  
Vol 11 (1) ◽  
Author(s):  
Pei Li ◽  
Wei Chen ◽  
Desheng Li ◽  
Rufei Yu ◽  
Wenjing Zhang
Keyword(s):  
Dynamic Analysis ◽  
Multibody Systems ◽  
Mechanical Systems ◽  
Clearance Joints ◽  
Revolute Joints ◽  
Wear Analysis ◽  
Coupling Dynamics ◽  
System Life ◽  
Crank Mechanism

The wear of multiple joints with clearance is one of the main impacts on the life of mechanical systems while very limited study has been done on this subject. To be different with many existed researches focused on the dynamic analysis of multibody systems with multiple clearance joints, the wear of two revolute joints with clearance in multibody systems is analyzed in this paper by coupling dynamics with tribology. Based on a planar slider crank mechanism with two clearance joints, it is observed that the clearance sizes nonlinearly influence the wear depths of the two joints with clearance. Meanwhile, an appropriate relationship between the two joints' clearance sizes can significantly decrease the wear of the joints, which would greatly improve the system life. Both the independent and interactive influences of the two joints with clearances on the wear are investigated in this paper. The relation equations of the two clearances obtained in this work will significantly decrease the wear of the two clearance joints.

Modeling and Dynamic Analysis of a Slider-Crank Mechanism With Flexible Coupler and Joint

1991 ◽  
Author(s):  
Junghsen Lieh ◽  
Imtiaz Haque
Keyword(s):  
Dynamic Analysis ◽  
Virtual Work ◽  
Equations Of Motion ◽  
Joint Stiffness ◽  
Mechanism Model ◽  
Double Frequency ◽  
Varying Coefficients ◽  
Matrix Expansion ◽  
Time Varying Coefficients ◽  
Crank Mechanism

Abstract Modeling and dynamic analysis of a slider-crank mechanism with flexible joint and coupler is presented. The equations of motion of the mechanism model are formulated using a virtual work multibody formalism and cast in terms of a minimum set of generalized coordinates through a Jacobian matrix expansion. Numerical results show the influence of time-varying coefficients on the mechanism dynamic behavior due to a repeated task. The results illustrate that the joint motion and coupler deformation are highly coupled. The joint response is dominated by double frequency of input, however, the coupler deformation is influenced by the same frequency as that of excitation. Increase in joint stiffness tends to decrease the variations in coupler deformation.

Efficient Dynamic Analysis Method for Multibody Systems With Constraint Violation Stabilization Method

1999 ◽  
Author(s):  
Apiwat Reungwetwattana ◽  
Shigeki Toyama
Keyword(s):  
Dynamic Analysis ◽  
Multibody Systems ◽  
Analysis Method ◽  
Stabilization Method ◽  
Kinematic Constraint ◽  
Constraint Violation ◽  
Closed Loops ◽  
Constraint Stabilization ◽  
Constraint Equations ◽  
Crank Mechanism

Abstract This paper presents an efficient extension of Rosenthal’s order-n algorithm for multibody systems containing closed loops. Closed topological loops are handled by cut joint technique. Violation of the kinematic constraint equations of cut joints is corrected by Baumgarte’s constraint violation stabilization method. A reliable approach for selecting the parameters used in the constraint stabilization method is proposed. Dynamic analysis of a slider crank mechanism is carried out to demonstrate efficiency of the proposed method.

Analysis of Turnover Mechanism of the Aluminum Electrolytic Capacitor Assembling Machine

2013 ◽  
Vol 341-342 ◽  
pp. 438-442
Author(s):  
Zhou Zheng ◽  
Bi Zhong Xia ◽  
Yi Ran Liu ◽  
Zhong Dong Ouyang
Keyword(s):  
Dynamic Analysis ◽  
Optimization Design ◽  
Parametric Modeling ◽  
Resultant Force ◽  
Electrolytic Capacitor ◽  
Aluminum Electrolytic Capacitor ◽  
Mechanism Optimization ◽  
Structure And Motion ◽  
Adams Software ◽  
Motion Characteristics

Turnover mechanism is one of the important parts of the element bar conveying subsystem in the aluminum electrolytic capacitor assembling machine (AECAM). This paper analyzed the structure and motion characteristics of the turnover mechanism, and used the ADAMS software to do its parametric modeling, dynamic analysis and optimization design. Finally the paper concluded that Final result of turnover mechanism optimization was that the maximum of resultant force in the cam rotary center decreased by 49.3%.Application of ADAMS software will provide a new way for design and improvement of the assembling machine in future.

Dynamic Optimization Design of High-Speed Under-Table Swing-Arm Gripper System in Sheet-Fed Offset Press

2011 ◽  
Vol 230-232 ◽  
pp. 916-919
Author(s):  
Chang Xian Cheng
Keyword(s):  
Dynamic Analysis ◽  
Dynamic Optimization ◽  
High Speed ◽  
Dwell Time ◽  
Optimization Design ◽  
State Of The Art ◽  
Print Quality ◽  
Swing Arm ◽  
Fixed Axis ◽  
Gripper Systems

By analyzing various kinds of gripper systems of different sheet-fed offset presses, the under-table swing-arm system, with a fixed axis, has the advantages of meeting high-speed press running requirement, keeping longer dwell time of printing sheets, helping improve print registration, and hence in favor of assuring HIFI print quality while having high press output. The dynamic optimization design of the under-table swing-arm system is vital to the higher performance of the system on the state of the art press machines. Through dynamic analysis of the gripper system, the way of dynamic optimization design and its correspondent formulas are derived in this paper.

Reliability optimization design of a planar multi-body system with two clearance joints based on reliability sensitivity analysis

2018 ◽  
Vol 233 (4) ◽  
pp. 1369-1382 ◽  
Author(s):  
Yong Gao ◽  
Fang Zhang ◽  
Yuanyuan Li
Keyword(s):  
Sensitivity Analysis ◽  
Contact Force ◽  
Optimization Design ◽  
Great Influence ◽  
Force Model ◽  
Reliability Optimization ◽  
Clearance Joints ◽  
Clearance Joint ◽  
Reliability Sensitivity ◽  
Reliability Sensitivity Analysis

A general method for reliability sensitivity analysis and reliability optimization design of planar slider crank mechanism with two clearance joints was presented. A continuous contact force model considering energy dissipation was employed to estimate the contact force acting on the clearance joint. The Monte Carlo method was used to analyze the reliability sensitivity. In addition, based on the Kriging method, a surrogate model was constructed with consideration of explicit function expression. The precision and reliability of the presented method have been successfully demonstrated by numerical simulation. The results show that the number and position of clearance joint considered have a great influence on the maximum allowable displacement of the slider. The changing of the reliability sensitivity for the mean and variance of several random variables has certain regularity. Compared with the determinacy optimization design, the reliability optimization design presented here shows better dynamical performances.

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