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Fluid/Structure-Interaction Analysis of the Fish-Bone-Active-Camber Morphing Concept

机译：鱼骨-主动室变形概念的流体/结构相互作用分析

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摘要

A coupled, partitioned fluid/structure-interaction analysis is introduced for calculation of the deformed equilibrium shape, aerodynamic coefficients, and actuation requirements of the fish-bone-active-camber morphing concept. The fish-bone-active-camber concept is a high-authority morphing camber architecture with a broad range of applications, including fixed-wing aircraft, helicopters, wind turbines, and tidal-stream turbines. The low chord wise bending stiffness of the morphing structure, high stiffness of the tendon drive system, and the large changes in aerodynamic loading while morphing necessitate a coupled fluid/structure-interaction analysis for determination of the static equilibrium. An Euler-Bernoulli beam-theory-based analytical model of the structure is introduced and validated. Aerodynamic loads are found using the XFOIL software, which couples a potential-flow panel method with a viscous boundary-layer solver. Finally, the tendons are modeled as linear stiffness elements whose internal strains are found from the Euler-Bernoulli theory, and whose axial forces create bending moments on the spine at their discrete mounting points. Convergence of the fluid/structure-interaction code is stabilized through incorporation of relaxation parameters. The results for two chosen test cases are presented to give an insight into the mechanical and aerodynamic behavior of the fish-bone-active-camber concept.
机译：引入了耦合的，分区的流体/结构-相互作用分析，以计算变形的平衡形状，空气动力系数以及鱼骨-活动室变形概念的致动要求。鱼骨活动拱形概念是一种高权威性的变形弧度架构，具有广泛的应用，包括固定翼飞机，直升机，风力涡轮机和潮流涡轮机。变形结构的低弦向弯曲刚度，腱驱动系统的高刚度，以及变形时气动载荷的较大变化，因此需要进行流体/结构相互作用耦合分析来确定静态平衡。引入并验证了基于Euler-Bernoulli梁理论的结构分析模型。使用XFOIL软件可以找到气动载荷，该软件将势能流面板方法与粘性边界层求解器结合在一起。最后，将筋束建模为线性刚度单元，从欧拉-伯努利理论中得出其内部应变，并且其轴向力在其离散的安装点在脊柱上产生弯矩。流体/结构相互作用代码的收敛通过引入松弛参数而得以稳定。给出了两个选定测试用例的结果，以深入了解鱼骨活动型腔概念的机械和空气动力学行为。

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  • 来源
    《Journal of Aircraft》 |2015年第1期|307-319|共13页
  • 作者

    Benjamin K. S. Woods; Iman Dayyani; Michael I. Friswell;

  • 作者单位

    Swansea University, Swansea, Wales SA2 8PP, United Kingdom;

    Swansea University, Swansea, Wales SA2 8PP, United Kingdom;

    Swansea University, Swansea, Wales SA2 8PP, United Kingdom;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
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