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RESEARCH PAPERS

The Elastic-Dynamic Behavior of a Counterweighted Rocker Link with an Overhanging Endmass in a Four-Bar Linkage—Part I: Theory

[+] Author and Article Information
W. G. Jandrasits

Westinghouse Electric Corporation, Bettis Atomic Power Laboratory, West Mifflin, Pa.

G. G. Lowen

Department of Mechanical Engineering, The City College of the City University of New York, New York, N.Y.

J. Mech. Des 101(1), 77-88 (Jan 01, 1979) (12 pages) doi:10.1115/1.3454028 History: Received June 08, 1978; Online October 21, 2010

Abstract

The theoretical part of an investigation of the elastic-dynamic behavior of a counterweighted four-bar linkage rocker link, which in addition carries an overhanging mass, is given. The linearized equations of motion are derived by way of Hamilton’s integral, a novel elastic mechanism constraint equation, and the method of Kantorovich. The normal modes of the free vibration of the complex link provide the space portions of the solution, while the time portions are furnished by the resulting Hill’s equations. Floquet theory is adapted for stability considerations and a method for obtaining steady-state solutions is given. Part II applies the solution techniques to a specific mechanism and reports on confirming experimentation.

Copyright © 1979 by ASME
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