Design of piezoelectric quasi- zero-stiffness metastructures for improved low-frequency vibration isolation

被引：0

作者：

Jiang, Shouqian ^{[1
]}

Liu, Zhiyuan ^{[1
]}

Yi, Kaijun ^{[1
]}

Zhu, Rui ^{[1
]}

Kovacic, Ivana ^{[2
]}

机构：

[1] Beijing Inst Technol, Sch Aerosp Engn, Beijing 100081, Peoples R China

[2] Univ Novi Sad, Ctr Excellence Vibroacoust Syst & Signal Proc, Fac Tech Sci, Novi Sad, Serbia

来源：

SMART MATERIALS AND STRUCTURES | 2024年 / 33卷 / 11期

基金：

中国国家自然科学基金;

关键词：

piezoelectric; quasi-zero stiffness; metastructure; vibration isolation; digital circuit; SYNTHETIC IMPEDANCE; SYSTEM;

D O I：

10.1088/1361-665X/ad811b

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

In this paper, a novel type of piezoelectric quasi-zero stiffness (QZS) metastructure is proposed and the improved vibration isolation performance is investigated. A piezoelectric QZS metastructure is composed of curved beams covered with piezoelectric macro-fiber composite patches, to which digital circuits are connected. Based on the principle of minimum potential energy and the mode superposition method, the constrain on the geometry and material parameters of the piezo-curved beams to achieve QZS is given. According to this design criterion, 1D, 2D and 3D piezoelectric QZS metastructures are designed, and their improved low-frequency vibration isolation characteristics are comprehensively analyzed through theoretical, numerical and experimental studies. It is demonstrated that by optimizing the parameters of the resonant transfer functions implemented in the digital circuits, high-level damping localized near the first resonant peak can be introduced into the curved beams. As a result, the resonant peaks of the metastructures can be reduced without compromising the isolation performance beyond those peaks.

引用

页数：17