Nonsimilar Normal Mode Vibrations of Nonlinear Systems Having Two Degrees of Freedom

[+] Author and Article Information
R. M. Rosenberg, J. K. Kuo

University of California, Berkeley, Calif.

J. Appl. Mech 31(2), 283-290 (Jun 01, 1964) (8 pages) doi:10.1115/1.3629599 History: Received March 18, 1963; Online September 15, 2011


When a nonlinear system having several masses vibrates in normal modes, the time histories of the motion of these masses are, in general, different in wave shape (although in certain special nonlinear systems they differ at most in amplitude, but not in shape). When the wave shapes differ, the normal mode vibration is called nonsimilar. In this paper, nonsimilar normal mode vibrations are analyzed with respect to wave shape and stability. The systems considered are those lying close to systems having similar normal mode vibrations. An example is worked out in detail, and a comparison with an experimental study is reported.

Copyright © 1964 by ASME
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