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| Simulation Study on Wing Skin Deformation Monitoring Based on Inverse Finite Element Method |
| FU Shushan 1，2 , SUN Guangkai 1，2 , HE Yanlin 1，2 , CHU Daping 1，2 |
1. Key Laboratory of the Ministry of Education for Optoelectronic Measurement Technology and Instrument, Beijing Information Science & Technology University, Beijing 100192, China;
2. Beijing Laboratory of Optical Fiber Sensing and System, Beijing Information Science & Technology University, Beijing 100016, China |
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Abstract Aiming at the dynamic monitoring requirements of wing skin deformation, a skin deformation reconstruction method based on inverse finite element method and strain information was studied. Firstly, the three-node triangular element was used to discretize the structure, and the Kirchhoff plate and shell bending theory was used to construct the mechanical model. Then, the relationship between strain and displacement is deduced theoretically, the reconstruction algorithm is constructed, and a visualization software platform is developed to display the deformation of wing skin structure in real time. Finally, the airfoil skin structure and square skin structure are taken as the research objects, and the correctness and versatility of the reconstruction algorithm are verified by simulation analysis. The results show that the root mean square error of structural deformation reconstruction is 1.2% and the reconstruction time is less than 20ms when the density of strain measuring points is 2/m2 . The deformation reconstruction method based on the inverse finite element method can be used in the deformation reconstruction of wing skin, which has a promising application in the field of aircraft structural deformation monitoring.
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2022, 
