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| Aerodynamic Load Application Method of Wing Based on LSCM and Polynomial Fitting |
| Received:August 08, 2024 Revised:August 31, 2024 |
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| DOI：10.7643/issn.1672-9242.2024.09.015 |
| KeyWord:wings aerodynamic load surface parameterization polynomial fitting load conversion |
| Author | Institution |
| YU Zhiqiang |
College of Aerospace Engineering, Nanjing University of Aeronautics & Astronautics, Nanjing , China |
| WANG Ke |
College of Aerospace Engineering, Nanjing University of Aeronautics & Astronautics, Nanjing , China |
| YANG Xiangyu |
College of Aerospace Engineering, Nanjing University of Aeronautics & Astronautics, Nanjing , China |
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| Abstract: |
| The work aims to allocate the discrete aerodynamic load calculated by the wing to the finite element nodes of the structure precisely and equivalently. Firstly, the aerodynamic mesh and the finite element mesh were mapped to the same two-dimensional intermediate surface by Least Square Conformal Maps (LSCM), and then the distribution of the aerodynamic load was fitted by Chebyshev polynomial on the intermediate surface. Finally, the coordinates after finite element node mapping were substituted to convert the aerodynamic load into finite element load. With the method presented in this paper, the whole discrete allocation of aerodynamic load on the finite element mesh under the condition of control force and center of compression coordinate error can be realized. The LSCMmethod can realize conformal mapping of large curvature shells to two-dimensional planes. The Chebyshev polynomial modeling and parameter identification can fit the complex aerofoil aerodynamic loadwith high precision. The combination of the two methods can make the load conversion process both efficient and accurate. |
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