Wind Turbine Tower Wall Section With Protrusion Reinforcement
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Solution Overview
Problem
There is a need for a wall section for a wind turbine tower that provides structural rigidity and stiffness while accommodating a door opening without reducing the overall stiffness of the tower, and also aims to reduce weight and manufacturing costs.
Innovation Solution
A wall section with a protrusion extending transversely to the thickness direction, which acts as a rib or support structure to reinforce the area around the opening, maintaining uniform thickness and incorporating ventilation holes and mounting elements for a door, manufactured from cast metal like steel, optimized through computer modeling for enhanced structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a door opening is provided in the wind turbine tower wall for maintenance access, then ease of operation is improved, but structural rigidity and stiffness deteriorate
Solution Approach 1:
The wall section incorporates a protrusion that creates a localized thickening around the door opening area. This local quality change reinforces the specific region where the opening is present, compensating for the stiffness reduction caused by the opening while maintaining the original thin-walled structure in other areas.
Solution Approach 2:
The protrusion extends in the thickness direction (third dimension) of the wall section, creating a three-dimensional reinforcement structure. This dimensional change allows the reinforcement to effectively counteract the opening's effect on stiffness without increasing the overall lateral dimensions of the tower.
2Strength
If the wall section thickness is increased to compensate for the opening, then structural rigidity is improved, but weight increases
Solution Approach 1:
Instead of uniformly increasing the wall thickness throughout the entire tower, the invention applies local thickening only in the specific region where the door opening is present. This localized approach provides the necessary structural reinforcement while minimizing the additional material required and thus reducing weight increase.
Solution Approach 2:
The wall section is segmented into different thickness zones: a thinner region for the majority of the tower wall and a thicker region with the protrusion around the door opening. This segmentation allows optimized material distribution, providing strength where needed while reducing overall weight.
3Strength
If a protrusion is added to the wall section to maintain stiffness, then structural rigidity is improved, but device complexity increases
Solution Approach 1:
The protrusion is integrally formed with the wall section as a single cast component. This merging of the reinforcement feature into the basic wall structure eliminates the need for separate reinforcement elements, reducing assembly complexity while maintaining the stiffness-providing geometry.
Solution Approach 2:
The wall section is manufactured as a cast metal component that integrates the protrusion feature directly into the casting process. This approach creates a composite-like structure where the varying thickness profile (thin wall with localized thickening) is achieved in a single manufacturing step, simplifying production despite the geometric complexity.
Data Source
AI summary
A wall section for a tower of a wind turbine is provided. The wall section includes an inner edge surrounding an opening of the wall section and a protrusion protruding in a thickness direction of the wall section and extending transverse to the thickness direction. Further a wind turbine tower is provided. The wind turbine tower includes a tower wall portion and a wall section as described above. The wall section is connected to the tower wall portion at least at a portion of an outer edge of the wall section.