IDENTIFICATION OF NON-LINEAR HYSTERETIC ISOLATORS FROM PERIODIC VIBRATION TESTS

• Published in: Journal of sound and vibration Vol. 217; no. 4; pp. 737 - 756
• Main Authors: Ni, Y.Q., Ko, J.M., Wong, C.W.
• Format: Journal Article
• Language: English
• Published: London Elsevier Ltd 05.11.1998; Elsevier
• Subjects: Exact sciences and technology; FREQUENCY DOMAINS; Fundamental areas of phenomenology (including applications); HARMONIC OSCILLATION; MATHEMATICAL MODELS; Measurement and testing methods; Measurement methods and techniques in continuum mechanics of solids; nonlinear analysis; NONLINEAR EQUATIONS; PARAMETER IDENTIFICATION; PERIODIC VARIATIONS; Physics; SLIDING FRICTION; Solid mechanics; Structural and continuum mechanics; VIBRATION DAMPING; Vibration isolation systems; VIBRATION ISOLATORS; VIBRATION TESTS; Cable; Friction; Vibration damper; Frequency domain method; Vibration test; System identification; Measurement method; Non linear effect; Experimental study; Vibration isolation; Modeling; Mechanical hysteresis
• ISSN: 0022-460X; 1095-8568
• DOI: 10.1006/jsvi.1998.1804

This paper addresses the parameter identification of friction-type hysteretic isolators based on the versatile Bouc–Wen differential model. A frequency domain method is developed to identify the model parameters from the experimental data of periodic vibration tests. All the five parameters in the hysteretic model are obtained by a one-stage parameter estimate scheme. Numerical simulations show that the proposed method is insensitive to the noise in the observation signals. This method is then implemented to model and identify the experimental hysteresis loops of wire–cable vibration isolators, and the accuracy of the parameter identification is verified by comparing the measured and identified harmonic components of the hysteric restoring force.