压电复合材料结构的减振/致动性能优化

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Abstract 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°.

Key words： piezoelectric composite structure vibration damping actuation genetic algorithm stacking sequence lay-up angle

Received: 08 March 2022 Published: 15 March 2023

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	LI Zhixin
	ZHENG Zhiwei
	HUANG Xiuchang

Cite this article:

LI Zhixin,ZHENG Zhiwei,HUANG Xiuchang. Optimization of vibration reduction/actuation performances of piezoelectric composite structures[J]. JOURNAL OF VIBRATION AND SHOCK, 2023, 42(5): 176-182.

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2023/V42/I5/176

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