Tower Segments with Gap-Forming Flanges for Stable Assembly
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Solution Overview
Problem
Transporting and assembling large, elongated components such as tower sections for wind turbines is challenging due to height and curve radius restrictions, leading to stability and assembly verification issues, especially when tubular steel towers exceed mass and size limitations.
Innovation Solution
The use of longitudinal flanges with a surface contour that creates a gap between sections, allowing the shell to be divided into parts easily in the factory and reassembled on-site, with optional sealing elements to maintain stability and geometry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If tower sections are divided into multiple segments for transport, then transportability is improved, but assembly complexity and stability verification difficulty increase
Solution Approach 1:
The tower shell is divided into multiple transportable segments along the longitudinal flange, allowing each segment to be transported separately while maintaining the ability to assemble them into a complete tower section at the installation site
Solution Approach 2:
The longitudinal flange is pre-attached to the shell segment in the factory before separation, ensuring that the connection geometry is already prepared and will align correctly when segments are assembled on-site, reducing assembly complexity
2Manufacturing precision
If longitudinal flanges are attached before shell separation, then connection geometry is preserved, but flange damage risk increases during separation
Solution Approach 1:
The longitudinal flange features a relief-shaped recess at its end facing the shell, creating a localized gap region that prevents stress concentration and damage during shell separation while maintaining the connection geometry in the attached regions
3Ease of manufacture
If shell is separated along longitudinal flanges, then transportability is improved, but gap formation and stability issues arise
Solution Approach 1:
The shell is segmented along the longitudinal flange with a controlled gap, allowing separate transport while maintaining the ability to reassemble into a stable complete structure at the installation site
Solution Approach 2:
The relief-shaped recess in the longitudinal flange acts as an intermediary feature that manages the gap formation during separation, preventing uncontrolled deformation and maintaining structural integrity
Data Source
Figure 1A
Figure 1B
Figure 2
AI summary
A segment (100) of a tower section has a shell segment (120) of the tower section and, secured to a longitudinal side of the shell segment (120), at least one longitudinal flange (130) for connection to a longitudinal flange of another segment of the tower section. The longitudinal flange (130) has a part (132) of a surface contour which extends from a contact surface (136) of the longitudinal flange (130) which is provided for connection to a longitudinal flange of another segment to a contact surface (134) connected to the shell segment (120). The part (132) of the surface contour is spaced from a contact plane (106) extending through the contact surface (136).