A calculation method for checking the strength of a yaw connecting bolt of a wind turbine

Abstract

The invention belongs to the technical field of strength checking, analyzing and calculating methods for high-strength connecting bolts of wind turbines, relates to a calculation method for checking the strength of a yaw connecting bolt of a wind turbine. The objective of the invention is to solve the problem that a conventional yaw connection bolt model does not accord with an actual load transmission path, Thread action simulation partial rigidity, and the calculation result is inaccurate. According to the method, a yaw connection bolt structure model which completely accords with a load transmission path is established; A multilayer beam unit is adopted to simulate the action of multiple circles of threads, calculation of the ultimate strength and the fatigue strength of the yaw connecting bolt is completed through an abaqus solver and bladed software, calculation of the stress on the bolt is accurate, and safe and reliable operation of a unit is guaranteed. The method is characterized by comprising the steps that a bolt calculation model conforming to a load transmission path is established; the ultimate strength of the yaw connecting bolt is checked; And the fatigue strength of the yaw connecting bolt is checked. The method can ensure the complete load transmission path, enables the stress borne by the bolt to be calculated accurately, and improves the operation safety andreliability of the unit.

Description

technical field [0001] The invention belongs to the technical field of strength check analysis and calculation method of high-strength connection bolts of wind turbines, and in particular relates to a calculation method for strength check of wind turbine yaw connection bolts. Background technique [0002] During the operation of the wind turbine, in order to make the wind rotor face the wind direction, the yaw system is used to realize the wind. The yaw connecting bolts in the system are the connecting parts of the whole system, and they must bear the overturning moment in complex external load conditions. Therefore, the strength check calculation of the yaw connecting bolts must be carried out. Guarantee normal work and ensure reliable operation of wind turbines. [0003] The shape of the structure around the yaw connection bolts is complex and irregular, and the traditional engineering algorithm is not applicable. According to the requirements of the GL specification, the...

AI Technical Summary

Problems solved by technology

[0004]The purpose of this invention is to solve the problems that the past yaw connection bolt model does not match the actual load transmission path, the thread action simulates partial rigidity, and the calculation results are inaccurate. Establish a yaw connection bolt structure model that completely complies with the load transfer path, such as As shown in Figure 1 and Figure 2, The multi-layer beam element is also used to simulate the action of multi-turn threads, and the calculation of the ultimate strength and fatigue strength of the yaw connection bolts is completed through the abaqus solver and bladed software, so that the stress on the bolts can be calculated accurately, ensuring safe and reliable operation of the unit

Images