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首页> 外文期刊>Journal of aerospace engineering >Flutter Characteristics of Laminated Composite Plates Subjected to Yawed Supersonic Flow Using Inverse Hyperbolic Shear Deformation Theory
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Flutter Characteristics of Laminated Composite Plates Subjected to Yawed Supersonic Flow Using Inverse Hyperbolic Shear Deformation Theory

机译：基于反双曲剪切变形理论的偏航流作用下的复合材料层合板颤振特性

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摘要

This paper deals with the investigations of supersonic flutter characteristics of laminated composite plates. The composite plates are modelled using a recently developed nonpolynomial shear deformation theory, which considers the required shear deformation effects in terms of an inverse hyperbolic function of thickness coordinate. The aerodynamic load is calculated by implementing linear piston theory including the influence of yaw angle. An isoparametric generalized finite-element formulation is developed for the aeroelastic analysis taking into account of required structural equations such as constitutive relations, kinematics relations, displacement field, and the principle of minimum potential energy together with the supersonic aerodynamics based on linear piston theory. The results are obtained by solving the developed system of governing equations for the flutter boundary, and the obtained results are validated against the existing analytical and numerical solutions. It is concluded that the developed formulation is accurate and efficient for the investigation of flutter behavior of laminated composite plates. Moreover, the strength and stiffness properties of composite plates are greatly influenced by fiber orientation, stacking sequence and material orthotropic ratio, flow characteristics are dependent on the flow angle, and geometric conditions mainly depend upon the boundary conditions. The influences of these stiffness characteristics (fiber orientation, stacking sequence, and material orthotropic ratio), geometric characteristics, and flow characteristics on the flutter boundary are examined and various benchmark conclusions are made. It is concluded that stiffness, flow, and geometric parameters must be considered as essential design parameters for enhanced flutter speed of supersonic vehicles fabricated of composite materials.
机译：本文研究了层压复合板的超音速颤振特性。使用最近开发的非多项式剪切变形理论对复合板进行建模，该理论根据厚度坐标的反双曲函数考虑了所需的剪切变形效应。通过执行线性活塞理论（包括偏航角的影响）来计算空气动力负荷。考虑到所需的结构方程（例如本构关系，运动学关系，位移场和最小势能原理）以及基于线性活塞理论的超音速​​空气动力学原理，开发了用于空气弹性分析的等参广义有限元公式。通过解决已开发的颤振边界控制方程系统来获得结果，并针对现有的解析和数值解验证了所获得的结果。结论是，所开发的配方对于研究层压复合板的颤振行为是准确而有效的。此外，复合板的强度和刚度特性受纤维取向，堆垛顺序和材料正交异性比的影响很大，流动特性取决于流动角度，几何条件主要取决于边界条件。研究了这些刚度特性（纤维取向，堆叠顺序和材料正交异性比），几何特性和流动特性对颤振边界的影响，并得出了各种基准结论。结论是，必须考虑将刚度，流量和几何参数作为提高复合材料制成的超音速飞行器扑扑速度的必要设计参数。

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  • 来源
    《Journal of aerospace engineering》 |2016年第2期|04015038.1-04015038.12|共12页
  • 作者

    Grover Neeraj; Maiti D. K.; Singh B. N.;

  • 作者单位

    Indian Inst Technol, Dept Aerosp Engn, Kharagpur 721302, W Bengal, India;

    Indian Inst Technol, Dept Aerosp Engn, Kharagpur 721302, W Bengal, India;

    Indian Inst Technol, Dept Aerosp Engn, Kharagpur 721302, W Bengal, India;

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  • 正文语种 eng
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  • 关键词

    Flutter characteristics;

    机译：颤振特性;

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