Offset-Beam Aluminum Truss Tower Section for Lightweight Strength
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Solution Overview
Problem
Existing truss towers face challenges in cost-effective installation due to high weight, hazardous materials, limited recyclability, and difficulty in calculating strength, particularly for fiber reinforced plastic and aluminum solutions, which hinder efficient transportation and safe operation in high-voltage transmission applications.
Innovation Solution
A lightweight truss tower section design featuring elongated corner beams and offset transverse beams, made from extruded aluminum with friction enhancing surfaces, providing improved structural strength and reduced weight, facilitating easier transportation and climbing, and allowing for adjustable height and reduced foundation excavation needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional steel or fiber reinforced plastic towers are used, then structural strength is ensured, but weight increases making transportation by helicopter expensive and time-consuming
Solution Approach 1:
The tower is divided into multiple tower sections that can be transported separately by helicopter and assembled on-site. Each section contains corner beams, transverse beams, and bracing beams as separate components, reducing individual component weights and making helicopter transportation more efficient and cost-effective.
Solution Approach 2:
The tower uses composite construction combining aluminum alloy corner beams with steel or aluminum transverse beams and bracing beams. This composite approach optimizes the weight-strength ratio, using lightweight aluminum for the main structure while incorporating stronger materials where needed for connections and bracing.
2Weight of moving object
If wooden towers are used to reduce weight and cost, then transportation efficiency improves, but toxic creosote treatment is required which is banned in the EU
Solution Approach 1:
The invention changes the material parameter from wood requiring creosote treatment to aluminum alloy and steel components that do not require toxic chemical treatments. This parameter change eliminates the harmful factor while maintaining the weight reduction benefit, making the tower suitable for EU regulations and environmentally sensitive areas.
3Weight of moving object
If fiber reinforced plastic towers are used to reduce weight, then transportation efficiency improves, but the material is expensive to produce and not recyclable
Solution Approach 1:
The invention changes the material parameter from fiber reinforced plastic to aluminum alloy and steel, which are more cost-effective to produce and fully recyclable. This parameter change maintains the weight reduction advantage while improving manufacturing economics and environmental sustainability through material recyclability.
4Weight of moving object
If aluminum towers with simple open cross-sections are used to reduce weight, then transportation efficiency improves, but they require guys or wires and are limited in size and load capacity
Solution Approach 1:
The tower uses a truss structure segmented into corner beams, transverse beams, and bracing beams that work together to provide high load capacity. This segmentation creates a rigid spatial framework that eliminates the need for guys or wires while maintaining lightweight construction, enabling the tower to support 132 kV transmission cables.
Solution Approach 2:
The tower combines aluminum alloy corner beams with steel or aluminum transverse beams and bracing beams to optimize the strength-to-weight ratio. This composite construction provides the structural rigidity and load capacity needed for high-voltage transmission while keeping the overall weight low enough for efficient helicopter transportation.
Data Source
AI summary
A tower section is for a truss tower. The tower section has three or more elongated corner beams arranged in parallel and spaced apart, and a plurality of transverse beams connected perpendicular to adjacent corner beams, thereby forming respective three or more sides. The transverse beams are distributed along the sides so that the transverse beams of one of the side are arranged offset to the transverse beams of the other sides.