Tower frame door opening of wind generating set and design method of tower frame door opening

Abstract

The invention discloses a tower frame door opening of a wind generating set and a design method of the tower frame door opening; the tower frame door opening consists of two straight line segments and a curve segment according to shape, and the curve segment consists of more than three circular arcs with different diameters. The thickness of a door frame of the tower frame door opening is 1.15 to 1.17 times of the thickness of a tower tube wall preferentially, the length of the door frame along the radial direction of a tower tube is 4.5 to 5.5 times of the thickness of the door frame preferentially, and the length of the door frame at the central height position of the door opening, which extends out of the tower tube wall, is about half of the length of the door frame along the radial direction of the tower tube. The actual design process of the tower frame door opening comprises an overall data design of a door frame section, a door frame section modeling, a stress concentration factor IIW (International Institute of Welding) interpolation calculation and the like. Firstly, obtain an optimized parameter of the shape of the curve segment at the door opening, secondly, based on the optimized parameter, perform a further optimization to a size parameter of the door frame. The tower frame door opening increases the mechanical property index and reduces the impact of the existing door opening on a tower tube structure.

Description

technical field [0001] The invention relates to a door opening of a tower frame of a wind power generating set and a design method thereof, in particular to a structure of a door opening of a tower frame of a wind power generator, and an optimization design method for parameters such as the opening shape and size of the door opening. Background technique [0002] Large wind turbine towers usually consist of one or more tower sections, while the base section is typically designed with door openings, door side stiffeners and door structures into the tower interior. The shape of the door opening and the door frame is usually composed of two semi-ellipses or multiple arcs and two straight segments, and the height and width of the door frame are usually designed according to engineering experience. Since the opening weakens the structural performance of the tower to a certain extent, there are currently many designs to strengthen this part (such as patent documents CN201588746U, ...

AI Technical Summary

Problems solved by technology

[0007] Since the opening of the ellipse is more retracted than the multi-segment arc, the opening area is slightly reduced, so the stress concentration area in the simulation calculation is narrowed (such as Figure 4 TS in ), but the maximum value of the nominal stress is still relatively large, and the stress concentration factor calculated by interpolation using the IIW code is too large

Images