Displacement and Force Analysis of Five-Rod Suspension With Flexible Joints

[+] Author and Article Information
J. Knapczyk, S. Dzierżek

Cracow University of Technology, 31-155 Kraków, ul.Warszawska 24, Poland

J. Mech. Des 117(4), 532-538 (Dec 01, 1995) (7 pages) doi:10.1115/1.2826715 History: Received January 01, 1994; Revised April 01, 1995; Online December 11, 2007


The paper presents a vector algebraic method for the displacement and force analysis of the five-rod wheel suspension mechanism, used as a rear suspension in some modern cars. Displacement equations are derived by using the solutions of the vector tetrahedron equations obtained as the closure or constraint equations for spatial multi-loop mechanisms. The method gives the possibility of reducing the system of constraint equations from the original five to two. The resultant equations are expressed in recursive notation, which isrelatively concise in form and convenient for programming, providing a very efficient and accurate algorithm. The system of force and torque equilibrium equations is solved in an explicit way. Flexible joints with experimentally determined linearized compliance matrices are taken into consideration, leading to an algorithm for elastokinematic analysis of the mechanism. Graphical illustration of the results is also presented.

Copyright © 1995 by The American Society of Mechanical Engineers
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