A lattice sandwich structure with the active variable stiffness device under aerodynamical condition

被引：36

作者：

Zhang, Yewei ^{[1
]}

Li, Zhi ^{[1
]}

Xu, Kefan ^{[1
]}

Zang, Jian ^{[1
]}

机构：

[1] Shenyang Aerosp Univ, Coll Aerosp Engn, Shenyang 110136, Peoples R China

来源：

AEROSPACE SCIENCE AND TECHNOLOGY | 2021年 / 116卷

基金：

中国国家自然科学基金;

关键词：

New lattice sandwich structure; Active variable stiffness; Aerodynamical condition; Active vibration control; FREE-VIBRATION ANALYSIS; NEGATIVE-STIFFNESS; COMPOSITE-MATERIALS; RECTANGULAR-PLATES; LARGE DEFLECTION; BEAMS; SUPPRESSION; PERFORMANCE; CORE; SPACECRAFT;

D O I：

10.1016/j.ast.2021.106849

中图分类号：

V [航空、航天];

学科分类号：

08 ; 0825 ;

摘要：

Herein, a novel pyramid lattice sandwich structure with the active variable stiffness (AVS) is proposed, which consists of a proportion integration (PI) active controller, a piezoelectric actuator, and a variable stiffness device. The principle of AVS is to process the real-time vibration feedback signal of the lattice sandwich beam by using the PI controller and the piezoelectric actuator to change structural stiffness continuously. The structure has excellent self-adjusting and active vibration reduction effect. Based on the supersonic piston theory, Hamilton's principle, and the assumed modes method, the dynamics equations of the whole structure are established. The vibration reduction and energy dissipation of lattice sandwich beams with AVS and without AVS are analyzed by using the Runge-Kutta algorithm. Moreover, the relevant parameters of PI controller, positive stiffness, negative stiffness, incoming flow velocity, damping coefficient, and installation position are compared and analyzed, respectively. The results indicate that the novel lattice sandwich structure with AVS can achieve ideal vibration reduction effect, and the efficiency can be improved by adjusting the parameters appropriately. (C) 2021 Elsevier Masson SAS. All rights reserved.

引用

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