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

Erkaya S., UZMAY I.

NONLINEAR DYNAMICS, vol.58, pp.179-198, 2009 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 58
  • Publication Date: 2009
  • Doi Number: 10.1007/s11071-009-9470-7
  • Title of Journal : NONLINEAR DYNAMICS
  • Page Numbers: pp.179-198
  • Keywords: Four-bar mechanism, Joint clearance, Shaking force and moment, Neural-genetic approach, Optimization, CONTINUOUS CONTACT MODEL, SLIDER-CRANK MECHANISM, MULTIBODY SYSTEMS, REVOLUTE JOINT, TURNING PAIRS, LINKAGE, OPTIMIZATION, BEARING, IMPACT


As a result of design, manufacturing and assembly processes or a wear effect, clearances are inevitable at the joints of mechanisms. In this study, dynamic response of mechanism having revolute joints with clearance is investigated. A four-bar mechanism having two joints with clearance is considered as a model mechanism. A neural network was used to model several characteristics of joint clearance. Kinematic and dynamic analyses were achieved using continuous contact mode between journal and bearing. A genetic algorithm was also used to determine the appropriate values of design variables for reducing the additional vibration effect due primarily to the joint clearance. The results show that the optimal adjusting of suitable design variables gives a certain decrease in shaking forces and their moments on the mechanism frame.