Passive pneumatic damping structure and blade comprising passive pneumatic damping structure

The invention discloses a passive pneumatic damping structure and a blade comprising the passive pneumatic damping structure, and the passive pneumatic damping structure comprises a branch blade and a swing mechanism; the sub-blades are rotationally connected to the blade tip end of the wind turbine blade body through the swing mechanism, and the section contour of each sub-blade is in a pneumatic wing shape. In the invention, in a constant airflow environment, the blades do not vibrate, the blade-dividing damping mechanism does not work, the vibration of the blades of the wind turbine is caused under the action of unstable airflow, and the eccentrically fixed blades can automatically excite the pneumatic damping mechanism to suppress the vibration of the blades of the wind turbine. An offset distance is formed between the pneumatic center of the pneumatic airfoil and the rotating center of the swing mechanism, and the rotating center of the swing mechanism is located on the connecting line of the front edge