The rapid increase in the mass of wind turbine blades has become one of the main factors limiting its large-scale development. To reduce the mass of the blade

a new type of biomimetic blade is proposed based on the characteristics of plant leaf vein distribution. According to the finite element method

the inner rib structure with bionic leaf veins are established and the corresponding layup is designed to obtain the lightweight blade

based on the fluid-structure coupling method to verify the structural performance of the blade in the extreme environment of different yaw angles

the results show that: the bionic blade can be guaranteed to ensure that the structural stiffness

ultimate strength and stability of the performance of the traditional blade under the premise of the similarity of the weight reduction of 6.6%; the bionic blade of the inner rib structure can help to enhance the structural stiffness of the blade and reduce the weight of the blade. The inner rib structure of the bionic blade helps to increase the structural stiffness of the blade

reduce the blade tip deformation

and help to reduce the maximum stress on the surface of the blade

but the maximum stress on the web plate increases slightly; the bionic blade"s anti-buckling performance under the extreme wind load at yaw-15° is slightly reduced due to the removal of the trailing edge reinforcing material

but the overall performance is still in the safe range.