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首页> 外文期刊>Journal of aerospace engineering >Static Aeroelastic Analysis of an Aircraft Wind-Tunnel Model by Means of Modal RBF Mesh Updating
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Static Aeroelastic Analysis of an Aircraft Wind-Tunnel Model by Means of Modal RBF Mesh Updating

机译：模态RBF网格更新对飞机风洞模型的静态气动弹性分析

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摘要

A numerical static aeroelastic analysis procedure, applying a modal approach in coupling the fluid dynamic and structural solutions, is presented. The method is based on a preliminary structural modal analysis from which a number of natural modes is selected to be used in the creation of a fluid dynamic domain morphing criterion. The mesh is made parametric on modal coordinates and updated using a mesh morphing tool based on radial basis functions (RBF) within the progress of the fluid dynamic computation. An intrinsically elastic numerical model is then created, and no further iteration with the structural solver is required. The modal forces are extracted by integrating the pressure on the wall boundaries and used to define the weights of the morphing action of each modal shape. This is a simplifying alternative to the traditional fluid dynamic-structural analysis coupling approach that makes it possible to bypass several complexities related to the implementation of 2-way fluid-structure interaction procedures. Furthermore, the modal approach is not affected by the error introduced by the interpolation required in the load-mapping procedure between the nonconformal fluid dynamic and structural meshes. Piaggio property static experimental measurements of a complete aircraft model in transonic conditions were used to validate the accuracy of the method. The modal solution was also compared to the one obtained by applying a traditional 2-way coupling procedure. The modal analysis was found to provide a solution extremely similar to the 2-way one also if adopting just a few modes. (C) 2016 American Society of Civil Engineers.
机译：提出了一种数值静态气动弹性分析程序，该方法采用模态方法来耦合流体动力和结构解。该方法基于初步的结构模态分析，从中选择了多种自然模态，以用于创建流体动态域变形准则。在模态坐标上将参数设置为网格，并在流体动力学计算过程中使用基于径向基函数（RBF）的网格变形工具对网格进行更新。然后创建一个内在弹性的数值模型，并且不需要使用结构求解器进行进一步的迭代。通过对壁边界上的压力进行积分来提取模态力，并将其用于定义每个模态形状的变形作用的权重。这是传统流体动力-结构分析耦合方法的简化替代方案，它使绕过与2通流体-结构相互作用程序的实现相关的几种复杂性成为可能。此外，模态方法不受非共形流体动力网格和结构网格之间的载荷映射过程中所需插值引入的误差的影响。跨音速条件下完整飞机模型的Piaggio特性静态实验测量用于验证该方法的准确性。还将该模态解决方案与通过应用传统的2向耦合程序获得的模态解决方案进行了比较。如果仅采用几种模式，就可以发现模态分析也提供了一种非常类似于2通的解决方案。 （C）2016年美国土木工程师学会。

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  • 来源
    《Journal of aerospace engineering》 |2016年第6期|04016061.1-04016061.14|共14页
  • 作者

    Biancolini Marco Evangelos; Cella Ubaldo; Groth Corrado; Genta Massimiliano;

  • 作者单位

    Univ Roma Tor Vergata, Dept Enterprise Engn, Via Politecn 1, I-00133 Rome, Italy;

    Design Methods, Viale Regina Elena 207, I-98121 Messina, Italy;

    Univ Roma Tor Vergata, Dept Enterprise Engn, Via Politecn 1, I-00133 Rome, Italy;

    Piaggio Aerosp, Dept R&D, Viale Gen Disegna 1, I-17038 Villanova Dalbenga, Savona, Italy;

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