scholarly journals Application of Nonlinear Energy Sink for Rotor System Vibration Suppression

2020 ◽  
Vol 56 (15) ◽  
pp. 191
Author(s):  
YAO Hongliang ◽  
CAO Yanbo ◽  
ZHANG Qin ◽  
WEN Bangchun
Keyword(s):  
Vibration Suppression ◽  
Nonlinear Energy Sink ◽  
Rotor System ◽  
System Vibration ◽  
Energy Sink ◽  
Nonlinear Energy

Nonlinear Normal Modes of a Continuous Cantilever Beam with Nonlinear Energy Sink Absorber

2013 ◽  
Vol 325-326 ◽  
pp. 214-217
Author(s):  
Yong Chen ◽  
Yi Xu
Keyword(s):  
Cantilever Beam ◽  
Vibration Suppression ◽  
Normal Modes ◽  
Nonlinear Energy Sink ◽  
Nonlinear Normal Modes ◽  
Harmonic Excitation ◽  
Energy Sink ◽  
Nonlinear Normal ◽  
Nonlinear Energy ◽  
Good Agreement

Using nonlinear energy sink absorber (NESA) is a good countermeasure for vibration suppression in wide board frequency region. The nonlinear normal modes (NNMs) are helpful in dynamics analysis for a NESA-attached system. Being a primary structure, a cantilever beam whose modal functions contain hyperbolic functions is surveyed, in case of being attached with NESA and subjected to a harmonic excitation. With the help of Galerkins method and Raushers method, the NNMs are obtained analytically. The comparison of analytical and numerical results indicates a good agreement, which confirms the existence of the nonlinear normal modes.

scholarly journals Multi-stable nonlinear energy sink for rotor system

2020 ◽  
Vol 118 ◽  
pp. 103273 ◽  
Author(s):  
Hongliang Yao ◽  
Yuwei Wang ◽  
Yanbo Cao ◽  
Bangchun Wen
Keyword(s):  
Nonlinear Energy Sink ◽  
Rotor System ◽  
Energy Sink ◽  
Nonlinear Energy

A Non-Traditional Variant Nonlinear Energy Sink: Transient Responses

2019 ◽  
Author(s):  
Youzuo Jin ◽  
Kefu Liu ◽  
Deli Li ◽  
Liuyang Xiong ◽  
Lihua Tang
Keyword(s):  
Energy Harvester ◽  
Vibration Suppression ◽  
System Modeling ◽  
Nonlinear Energy Sink ◽  
Initial Energy ◽  
Transient Responses ◽  
Continuous Contact ◽  
Magnet Coil ◽  
Energy Sink ◽  
Nonlinear Energy

Abstract In this paper, a non-traditional variant nonlinear energy sink (NES) is developed for simultaneous vibration suppression and energy harvesting in a broad frequency band. The non-traditional variant NES consists of a cantilever beam attached by a pair of magnets at its free end, a pair of the so-called continuous-contact blocks, and a pair of coils. The beam is placed between the continuous-contact blocks. The constraint of the continuous-contact blocks forces the beam to deflect nonlinearly. Each of the magnet-coil pairs forms an electromagnetic energy harvester. Different from a traditional way that attaches the coils to the primary mass, the developed setup has the coils fixed to the base. First, the developed apparatus is described. Subsequently, the system modeling and parameter identification are addressed. The performance of the apparatus under transient responses is examined by using computer simulation. The results show that the proposed apparatus behaves similarly as the NES with the following features: 1:1 resonance, targeted energy transfer, initial energy dependence, etc.

Bi-stable buckled beam nonlinear energy sink applied to rotor system

2020 ◽  
Vol 138 ◽  
pp. 106546 ◽  
Author(s):  
Hongliang Yao ◽  
Yuwei Wang ◽  
Linqing Xie ◽  
Bangchun Wen
Keyword(s):  
Nonlinear Energy Sink ◽  
Rotor System ◽  
Buckled Beam ◽  
Energy Sink ◽  
Nonlinear Energy

Dynamic Analysis of 1-Dof and 2-Dof Nonlinear Energy Sink With Geometrically Nonlinear Damping and Combined Stiffness

2021 ◽  
Author(s):  
Yunfa Zhang ◽  
Xianren Kong ◽  
Chengfei Yue ◽  
Huai Xiong
Keyword(s):  
Bifurcation Analysis ◽  
Vibration Suppression ◽  
Harmonic Balance Method ◽  
Nonlinear Energy Sink ◽  
Nonlinear Damping ◽  
Linear Oscillator ◽  
Frequency Detuning ◽  
Incremental Harmonic Balance Method ◽  
Energy Sink ◽  
Nonlinear Energy

Abstract Nonlinear energy sink (NES) refers to a typical passive vibration device connected to linear or weakly nonlinear structures for vibration absorption and mitigation. This study investigates the dynamics of 1-dof and 2-dof NES with nonlinear damping and combined stiffness connected to a linear oscillator. For the system of 1-dof NES, a truncation damping and failure frequency are revealed through bifurcation analysis using the complex variable averaging method. The frequency detuning interval for the existence of the strongly modulated response (SMR) is also reported . For the system of 2-dof NES, it is reported in a similar bifurcation analysis that the mass distribution between NES affects the maximum value of saddle-node bifurcation. To obtain the periodic solution of the 2-dof NES system with the consideration of frequency detuning, the incremental harmonic balance method (IHB) and Floquet theory are employed. The corresponding response regime is obtained by Poincare mapping, it shows that the responses of the linear oscillator and 2-dof NES are not always consistent, and 2-dof NES can generate extra SMR than 1-dof NES. Finally, the vibration suppression effect of the proposed NES with nonlinear damping and combined stiffness is analyzed and verified by the energy spectrum, and it also shows that the 2-dof NES system demonstrates better performance.

scholarly journals Vibration Suppression for Beam-Like Repeating Lattice Structure Based on Equivalent Model by a Nonlinear Energy Sink

2021 ◽  
Vol 2021 ◽  
pp. 1-15
Author(s):  
Gen Liu ◽  
Gongfa Chen ◽  
Fangsen Cui
Keyword(s):  
Vibration Suppression ◽  
Lattice Structure ◽  
Vibration Reduction ◽  
Coupled System ◽  
Nonlinear Energy Sink ◽  
Equivalent Model ◽  
External Excitation ◽  
Suppression Effect ◽  
Energy Sink ◽  
Nonlinear Energy

Based on the fully deployed space beam-like truss, the vibration reduction of the lattice structure is studied by using the local NES (nonlinear energy sink) attachment in this paper. The beam-like lattice structure is modeled as an equivalent linear continuous system (a finite length beam) by the equivalent method and validated with the finite element results. The dynamic vibration equations for the equivalent cantilever beam are established and the governing equations for the equivalent beam with NES are approximated by the Galerkin method. The displacement responses of the beam with and without NES attached under shock excitation are obtained. With NES at different positions, the amplitude responses of the coupled system under the external excitation at different positions are calculated to evaluate the suppression effect of the NES attachment to the structure. And with different masses of the NES, the amplitude responses of the coupled structure subject to the external excitation at different positions are also investigated to get the influence of the mass of the NES attachment to the vibration reduction. It can be seen from the results that the NES attachment can attenuate the response of the beam-like truss under transient excitation efficiently. And with the mass of NES attachment increasing, the vibration amplitude of the coupled system declines more rapidly, and the energy consumption efficiency of the NES attachment is higher. Moreover, the attenuation effect of the NES with different masses is experimentally analyzed. The experimental results are in good accord with the theoretical calculation.

Vibration suppression of composite laminated plate with nonlinear energy sink

2016 ◽  
Vol 123 ◽  
pp. 109-115 ◽  
Author(s):  
Ye-Wei Zhang ◽  
Hao Zhang ◽  
Shuai Hou ◽  
Ke-Fan Xu ◽  
Li-Qun Chen
Keyword(s):  
Vibration Suppression ◽  
Nonlinear Energy Sink ◽  
Laminated Plate ◽  
Composite Laminated Plate ◽  
Energy Sink ◽  
Nonlinear Energy
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