SOME RECENT PROGRESSES IN NONLINEAR PASSIVE ISOLATIONS OF VIBRATIONS

Abstract

Vibrations in aircraft and marine structures, due to various extreme environmental loads, have been attributing factors in accidents and failures. Over the last decade, as the demands for vibration and shock isolation performance increasing, the general approaches following the conventional categorization of passive, active, semi-active and hybrid has been extensive presented. Nonlinear passive vibration isolation is the state of the art of vibration control techniques for combining robustness of the passive device and high performance of the active devices. This paper surveys theoretical and practical advances in nonlinear passive isolation of vibration in recent ten years. Stiffness and damping both nonlinearities is considered in modeling of vibration isolation system; Deterministic and stochastic analysis are both conducted on the investigation of the dynamic behavior. Initially, a review of a general approach to quantify the effectiveness of nonlinear vibrations isolation is presented. This is then followed by a review of high-static-low-dynamic stiffness vibration isolation, damping nonlinearity vibration isolation, two-stage nonlinear vibration isolation and nonlinear vibration isolation materi-als. The other vibration isolation methods considered in this review include chaotic anti-control technology, influence of internal resonance and usage of nonlinear energy sink. The article is closed by conclusions, which highlight resolved and unresolved problems and recommendations for future research treads.