Structure design and experimental verification of multi-bandgap locally resonant unit

被引：0
|
作者：
Ma J.-G. [1 ,2 ]
Sheng M.-P. [1 ,2 ]
Han Y.-Y. [1 ,2 ]
机构：
[1] School of Marine Science and Technology, Northwestern Polytechnical University, Xi'an
[2] Research & Development Institute of Northwestern Polytechnical University in Shenzhen, Shenzhen
来源：
Zhendong Gongcheng Xuebao/Journal of Vibration Engineering | 2019年 / 32卷 / 06期
关键词：
Elastic support; Locally resonance; Mechanical impedance; Multi-bandgap; Vibration suppressor;
D O I：
10.16385/j.cnki.issn.1004-4523.2019.06.002
中图分类号：
学科分类号：
摘要：
To broaden the frequency range of vibration suppression, a vibration suppressor with multi-bandgap properties is proposed. According to the characteristics of multi-bandgap suppressor, the mechanical impedance equation is derived, and the dynamic coupling model of multi-bandgap locally resonant beam with elastic support at both ends is built. Based on this model, the dynamic properties of the beam under free boundary condition, clamped boundary condition, or other general elastic boundary conditions can be analyzed. The design of multi-bandgap vibration suppressor is carried out by setting the bending beam as the control object. Furthermore, the bending beam with elastic support at both sides under free boundary condition is tested, and the experimental results are consistent with the theoretical ones. The research shows that the multi-bandgap vibration suppressor proposed in this paper has wider frequency range of vibration suppression and lower limit of frequency. It provides references for low-frequency vibration and noise control. © 2019, Nanjing Univ. of Aeronautics an Astronautics. All right reserved.
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页码：943 / 949
页数：6
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