Abstract This work mainly concentrates on the optimization of cubic and bistable nonlinear energy sink (NES) to find maximum efficiency point under harmonic excitation. The conservative system is considered reveal inner property damping system. With application multiple scales method complex variables method, threshold excitation different response regimes are distinguished assumption 1:1 reson...

The main focus of this study is the development an adapted complex variable method with respect to equilibrium point in bistable nonlinear energy sink (NES), which mainly investigated vicinity 1:1 resonance. A simplified chaos trigger model established describe distance between stable phase cycle and pseudo-separatrix. An analytical expression can predict excitation threshold for occurrence. re...

To improve the safety and reliability of offshore structures subject to wave loading, active vibration control problem is always one significant issues in field ocean engineering. This paper deals with near–optimal a nonlinear energy sink (NES) mechanism. By taking dominant mode structure NES into account, dynamic model steel–jacket loading presented first. Then, using parameter perturbation ap...

In this paper, forced responses are investigated in a two degree-of-freedom linear system with a linear coupling to a Nonlinear Energy Sink (NES) subjected to quasi-periodic excitation. The quasi-periodic regimes associated to quasi-periodic forcing in the regime of 1:1-1:1 are studied analytically using the complexification method combined to the averaging method in terms of multi-time paramet...

We study passive and nonlinear targeted energy transfers induced by resonant interactions between a singledegree-of-freedom nonlinear energy sink (NES) and a 2-DOF in-flow rigid wing model.We show that it is feasible to partially or even completely suppress aeroelastic instability by passively transferring vibration energy from thewing to the NES in a one-way irreversible fashion. Moreover, thi...

The aim of this paper is to study the energy pumping (the irreversible energy transfer from one structure, linear, to another structure, nonlinear) robustness considering the uncertainties of the parameters of a two DOF mass-springdamper, composed of two subsystems, coupled by a linear spring: one linear subsystem, the primary structure, and one nonlinear subsystem, the so-called NES (non-linea...

Owing to its vibration reduction and indirect signal amplification characteristics, a nonlinear energy sink (NES) is used for crack identification of structures. The equation cracked simply supported beam with an NES derived the influences properties on dynamics system are investigated. A pixel method applied estimate phase diagram areas parameters identified based geometric features diagram. I...

Abstract The cubic or third-power (TP) nonlinear energy sink (NES) has been proven to be an effective method for vibration suppression, owing the occurrence of targeted transfer (TET). However, TET is unable triggered by low initial input, and thus TP NES would get failed under low-amplitude vibration. To resolve this issue, a new type with fractional nonlinearity, e.g., one-third-power (OTP) p...

Abstract A broadband adaptive vibration control strategy with high reliability and flexible versatility is proposed. The damping performance of nonlinear energy sink (NES) has attracted attention. However, targeted transfer may cause severe NES. Besides, it difficult to realize pure stiffness without the linear part. As a result, NES not high. low hindered its application in engineering. In add...

Abstract Nonlinear energy sink (NES) can passively absorb broadband from primary oscillators. Proper multiple NESs connected in parallel exhibit superior performance to single-degree-of-freedom (SDOF) NESs. In this work, a linear coupling spring is installed between two so as expand the application scope of such vibration absorbers. The absorption and parallel-coupled system response induced by...