Closed-loop subsonic flutter control of smart symmetric variable stiffness composite laminates in tapered-swept configurations

IF 4.2 2区工程技术 Q1 MECHANICS

European Journal of Mechanics A-Solids Pub Date : 2025-09-11 DOI:10.1016/j.euromechsol.2025.105875

Pritam Mondal, Prashanta Kr. Mahato

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引用次数: 0

Abstract

This study investigates the free vibration, transient dynamic response, and flutter characteristics of cantilevered smart symmetric variable-stiffness composite laminated (VSCL) plates, focusing on both forward-swept and backward-swept tapered configurations with identical aspect ratios. Closed-loop vibration control using active fibre composites (AFCs) as actuators and sensors is implemented, incorporating a full-state feedback controller. Additionally, the effect of the plate's geometry on the flutter characteristics of VSCL plates is examined. A MATLAB-based finite element (FE) code is employed for normal mode analysis. A simple and effective methodology is used for meshing swept tapered plates. Unsteady aerodynamic forces are calculated using the doublet lattice method (DLM) in MSC Nastran for flutter analysis under subsonic flow conditions. The aerodynamic model is integrated with structural modal parameters via direct matrix abstraction programming (DMAP) in Nastran. Results show that forward-swept plates are prone to divergence, while backward-swept plates exhibit controlled flutter behaviour with the implemented controller.

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锥形扫掠智能对称变刚度复合材料层合板的亚音速颤振闭环控制

本文研究了悬臂式智能对称变刚度复合材料层合板（VSCL）的自由振动、瞬态动态响应和颤振特性，重点研究了具有相同长径比的前掠和后掠锥形结构。采用主动纤维复合材料（AFCs）作为致动器和传感器实现闭环振动控制，并结合全状态反馈控制器。此外，还研究了板的几何形状对VSCL板颤振特性的影响。采用基于matlab的有限元程序进行正态分析。采用一种简单有效的方法对扫掠锥形板进行网格划分。利用MSC Nastran软件中的双重点阵法（DLM）计算了亚音速条件下颤振分析的非定常气动力。通过Nastran软件的直接矩阵抽象规划（DMAP），将气动模型与结构模态参数进行集成。结果表明，前掠板易出现散度，后掠板的颤振行为受控制器控制。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

European Journal of Mechanics A-Solids 物理-力学

CiteScore

7.00

自引率

7.30%

发文量

275

审稿时长

48 days

期刊介绍： The European Journal of Mechanics endash; A/Solids continues to publish articles in English in all areas of Solid Mechanics from the physical and mathematical basis to materials engineering, technological applications and methods of modern computational mechanics, both pure and applied research.