Journal Tittle: Acta Mechanica Sinica
Article Tittle: Vibration suppression of an elastic beam with boundary inerter-enhanced nonlinear energy sinks
Author: Zhen Zhang, Hu Ding, Ye-Wei Zhang, Li-Qun Chen
Novelty/impact/significance
1. This paper proposes a novel approach to suppress the bending vibration of elastic structures through boundary NESs.
2. The vibration reduction effect of the boundary nonlinear energy sinks is very significant, and it is more feasible to implement.
3. This work is helpful to study the vibration of elastic structures with nonlinear boundaries and to promote the application of nonlinear vibration absorbers.
Scientific question
The non-linear coupling between the vibration-absorbing vibrator at the boundary and the vibration of the elastic beam forms a nonlinear coupling dynamic model of the nonlinear boundary continuum and the discrete vibrator.
Key of how
(use one or two sentence to describe the keys in how the question is solved/answered)
Separate the linear part and the nonlinear part of the boundary conditions, and incorporate the nonlinear part into the governing equation of elastic beam vibration in the form of concentrated force. Then, the discretization of the continuum nonlinear dynamic model is realized through the mode of linear boundary.
Major points
1. With the boundary NES, the vibrations of the elastic beam with periodic excitation and transient excitation both can be effectively suppressed.
2. Optimized NES can reduce the peak of the steady-state response of the beam by more than 98%.
3. The inertial design of the NES enables effective vibration suppression with a small additional mass. Therefore, it is possible to reduce the cost of vibration control.
Funding of the work
1. The National Natural Science Foundation of China (No. 12025204, 12002217)
2. The Program of Shanghai Municipal Education Commission (No. 2019-01-07-00-09-E00018)
3. The Key Research Projects of Shanghai Science and Technology Commission (No. 18010500100).
Please go to the website to read this article: http://ams.cstam.org.cn/EN/abstract/abstract157371.shtml