Nonlinear energy sink for vibration reduction of a beam on finite depth medium based on Winkler foundation

被引：0
|
作者：
Liu Z. [1 ]
Ma J. [1 ,2 ]
Guo Y. [1 ]
机构：
[1] School of Civil Engineering and Architecture, Henan University of Science and Technology, Luoyang
[2] Henan Provincial Engineering Technology Research Center for Safety and Protection of Buildings, Henan University of Science and Technology, Luoyang
来源：
Zhendong yu Chongji/Journal of Vibration and Shock | 2024年 / 43卷 / 01期
关键词：
incremental harmonic balance method; nonlinear energy sink; soil-structure interaction; vibration reduction; Winkler foundation beam theory;
D O I：
10.13465/j.cnki.jvs.2024.01.028
中图分类号：
学科分类号：
摘要：
Influence of soil-structure interaction on structural dynamic characteristics is an effect with nonlinear energy sink characteristics. Here, Winkler foundation beam theory considering soil body mass was used to make finite depth elastic medium be equivalent to additional mass of a nonlinear energy sink system, and a nonlinear dynamic model of a simply supported beam system on elastic medium under harmonic excitation was established. Galerkin method and the incremental harmonic balance method were used to analyze nonlinear dynamic response of this simply supported beam on elastic medium. The correctness of the theoretical results was verified using numerical calculation method, and the effectiveness of nonlinear energy sink was analyzed. Through parametric optimization and analysis, vibration reduction effects of Winkler foundation within different parametric ranges were revealed, and optimal parametric ranges were discussed. The study results showed that within reasonable parametric ranges, elastic medium has a good suppressing effect on dynamic response of the beam supported by it, elastic medium can quickly and effectively absorb its vibration energy under resonance conditions, and have good robustness; the optimized nonlinear energy sink can reduce the beam's resonance amplitude by over 95%, and have a wider vibration reduction frequency band; the study results reveal the vibration reduction mechanism of soil-structure interaction effect from the perspective of nonlinear energy sink to provide a theoretical basis for structural vibration suppression based on elastic foundation design. © 2024 Zhendong yu Chongji/Journal of Vibration and Shock. All rights reserved.
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页码：237 / 245
页数：8
相关论文
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