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RESEARCH PAPERS

Optimal Design of Resonance Suppression Helical Springs

[+] Author and Article Information
Yuyi Lin

Dept. of Mechanical & Aerospace Engineering, University of Missouri, Columbia, MO 65211

P. H. Hodges, A. P. Pisano

Dept. of Mechanical Engineering, University of California, Berkeley, CA 94720

J. Mech. Des 115(3), 380-384 (Sep 01, 1993) (5 pages) doi:10.1115/1.2919202 History: Received March 01, 1991; Online June 02, 2008

Abstract

Based on a previously developed and verified helical spring dynamic model, optimization and FFT subroutines have been added to the spring dynamic model as controlling and postprocessing units to form a computer-based optimal design tool. The objective function minimized is the amplitude of spring resonance. Design variables are the coefficients of a polynomial which describes the variation of the diameter of the spring wire along the spring helix. Constraints are the maximum fatigue stress at any location of the spring wire, the minimum and maximum wire diameter, and the maximum required spring force. In a case study for an automobile engine valve spring, resonant harmonic power has been reduced by 47 percent, given the newly designed spring a potential to be used at 8.3 percent higher engine speed before potential valve toss occurs.

Copyright © 1993 by The American Society of Mechanical Engineers
Topics: Resonance , Design , Springs
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