Engineering and Computer Science Faculty Publications

Title

Identification of Nonlinearity in Structural Systems: Theory, Simulation, and Experiment

Document Type

Article

Publication Date

11-1991

Journal Title

Applied Mechanics Reviews

Volume

44

Issue

11

First Page

S295

Last Page

S303

DOI

10.1115/1.3121368

Abstract

A procedure to identify nonlinear structural systems caused by quadratic or cubic stiffness nonlinearity, geometric asymmetry, internal resonance, and subject to parametric excitation is proposed. The method uses conventional instrumentation and modal analysis techniques to match observed behavior in the structural response to the behavior of nonlinear analytical models when subject to random, impulse, or harmonic excitations. Some of the structures studied in this paper behave linearly when subject to one type of excitation but exhibit uniquely nonlinear behavior when subject to other types of excitation.

Keywords

Simulation, systems theory, stiffness, impulse (physics), instrumentation, resonance