Neutral-Axis Calculation and Deformation Reconstruction of Wing Structure

The wing structure plays a pivotal role in ensuring the aerodynamic performance and operational safety of an aircraft. Due to the harsh and complex operating environment of the wing structure, wing deformation reconstruction based on strain data is currently the most popular technical path. The neutral axis, as the core parameter, its calculation accuracy will significantly affect the effect of deformation reconstruction. This study proposes a neutral axis calculation method based on deformation-strain information (DSI). By studying the coupling relationship, a neutral axis inversion calculation model is established, which can accurately calculate the neutral axis without prior knowledge such as the internal geometric configuration of the structure and the material gradient distribution. To verify the effectiveness, multi-condition simulation and ground experiments were designed and implemented, and the reconstruction accuracy was comprehensively evaluated. The results show that the DSI method exhibits better reconstruction accuracy under various working conditions, and the reconstruction error is reduced by more than 70%, compared with DTF and other methods, verifying the feasibility and engineering application value of the proposed algorithm.