The buffeting loading method research based on the all-movable vertical tail structure

During high-angle-of-attack flight and other severe conditions, high-maneuverability aircrafts often experience strong buffeting phenomena in critical structures such as the all-movable vertical tail structure, necessitating dynamic fatigue tests under combined buffeting and aerodynamic loads. To address the loading requirements for such tests, this paper develops a "Hydrostatic Spherical Coupling + Rubber Plate" buffeting excitation system and a shaking table servo system. The system achieves vertical loading on deformed surfaces by real-time tracking of the vertical tail's spatial deformation, while employing low-interference force control to minimize the impact of the loading device on the structure's dynamic characteristics. Experiments were conducted using a vertical tail simulator with identical dynamic characteristics to validate the proposed loading method. Results demonstrate that the system can stably apply low-, medium-, and high-level buffeting loads on the vertical tail structure, with reliable operation and complete data acquisition. The loading method meets the technical requirements for dynamic fatigue tests of all-movable vertical tail structures and exhibits direct engineering applicability, capable of being extended to real-structure testing.