Wind power blade punching blade root glass fiber reinforced plastic shear strength checking method

By calculating the leaf root connection parameters and finite element analysis, the shear stress and safety coefficient of the blade fiberglass of the wind power blade root are calculated, and the problems of the existing technology of wind power blade verification are solved, achieving high efficiency and low cost The shear strength check ensures the safety and reliability of blade connections.

CN119203647APending Publication Date: 2024-12-27JILIN CHONGTONG CHENGFEI NEW MATERIAL +1
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Patent Information

Application Number
CN202411144681.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-08-20
Publication Date
2024-12-27

AI Technical Summary

Technical Problem

The existing method of Fiberglass shear strength verification of wind power blade punching root fiberglass is costly and time-consuming, making it difficult to meet actual needs, affecting the reliability and safety of blade connections.

Method used

By obtaining the leaf root connection parameters, calculating the shear area and maximum preload force of the fiberglass, using finite element calculation to obtain the maximum load ratio and equivalent prosthetic load, combining these parameters to calculate the shear stress and shear strength safety coefficient, and shearing is performed Cut intensity check.

Benefits of technology

It shortens the verification time, reduces costs, ensures the safety and reliability of the fiberglass of wind power blades and roots, and meets the design requirements.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention provides a wind power blade punching blade root glass fiber reinforced plastic shear strength checking method, which comprises the following steps: obtaining blade root connection parameters, and calculating to obtain a glass fiber reinforced plastic shear area according to the blade root connection parameters; based on the nominal pre-tightening force of the blade root bolt, the maximum pre-tightening force of the blade root bolt is obtained through calculation; the maximum load ratio is obtained through finite element calculation, and the equivalent prosthesis load of the blade root glass fiber reinforced plastic is obtained through calculation in combination with the maximum load ratio and the blade root connection parameters; according to the maximum pre-tightening force and the equivalent prosthesis load, the shear stress of the blade root glass fiber reinforced plastic is calculated, and according to the shear stress, the anti-shear strength safety coefficient is calculated and obtained and used for checking the anti-shear strength. By checking the shear strength of the blade root glass fiber reinforced plastic, the wind power blade root glass fiber reinforced plastic meets the design requirements, and the overall safety and reliability of the wind power blade are ensured.
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