Optimization of vibration reduction/actuation performances of piezoelectric composite structures

被引：0
|
作者：
Li Z. [1 ]
Zheng Z. [1 ]
Huang X. [1 ]
机构：
[1] State Key Lab of Mechanical System and Vibration, Shanghai JiaoTong University, Shanghai
来源：
Zhendong yu Chongji/Journal of Vibration and Shock | 2023年 / 42卷 / 05期
关键词：
actuation; genetic algorithm; lay-up angle; piezoelectric composite structure; stacking sequence; vibration damping;
D O I：
10.13465/j.cnki.jvs.2023.05.022
中图分类号：
学科分类号：
摘要：
Piezoelectric composites are used to absorb structural vibration energy for damping and to apply voltage for actuation due to their superior mechanical-to-electrical energy conversion capability. In this paper, the design and optimization of the damping and actuation performance of a multilayer piezoelectric composite structure composed of carbon-glass-piezoelectric fibers are presented, and the corresponding structural lay-up recommendations and optimization results are given. The structure consists of a multilayer unidirectional hybrid fiber composite substrate and distributed piezoelectric patches, in which carbon, piezoelectric and glass fibers are laid symmetrically, and the piezoelectric patches are attached to the surface. Based on the Euler-Bernoulli beam theory and Hamilton's principle, the electromechanical coupling model of the piezoelectric composite structure dynamic characteristics is analyzed. By comparing the damping and actuation performance, the optimal lay-up sequence of the structure is obtained. The genetic algorithm (GA) is used to optimize the piezoelectric patches' positions and the lay-up angle to improve the vibration damping and actuation performance, respectively. The results show that the outermost distributed piezoelectric patches have a significant damping effect and the inner piezoelectric layer has better actuation capability. Compared with the empirical arrangement, the damping performance of the first three modes optimized by the genetic algorithm is improved by 0.67 dB, 0.77 dB and 1.87 dB. For better actuation effect, the carbon and glass fiber angles are 90.0015° and 53.0652°. © 2023 Chinese Vibration Engineering Society. All rights reserved.
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页码：176 / 182
页数：6
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