Abstract

During a study of the dynamic characteristics of a wire rope vibration isolation system constructed with helical isolators, an interesting instability was observed. Following an experimental investigation of this system, a semi-empirical model having non-linear stiffness, nth power velocity damping, and variable Coulomb-type friction damping was developed. Results obtained using ACSL compare well with experimental data. The primary emphasis of this paper, however, centers on the instabilities and large-response behavior of this semi-empirical model. Stabilizing effects are discussed.

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