Additive Manufacturing Multi-Material Wind Turbine Tower Sections
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Solution Overview
Problem
Current wind turbine tower manufacturing processes are labor-intensive, costly, and face transportation challenges due to large diameter limitations, requiring excessive material and reinforcement to withstand lateral forces, which increases weight and costs.
Innovation Solution
The use of additive manufacturing, specifically 3D printing, allows for on-site fabrication of multi-material wind turbine tower sections with internal reinforcement structures like embedded steel or composite materials, enabling larger diameters and reduced wall thickness while maintaining strength, thus optimizing tower design and reducing material and transportation costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If traditional extruded sheet metal manufacturing is used, then transportation is limited by road barriers, but additive manufacturing enables on-site fabrication of larger diameter towers
Solution Approach 1:
The patent replaces traditional mechanical welding and assembly processes with additive manufacturing (3D printing) technology. The tower sections are fabricated layer-by-layer using robotic extrusion of concrete or other materials, eliminating the need for complex welding operations and enabling on-site construction of large-diameter towers that would be impossible to transport by traditional methods.
Solution Approach 2:
The patent introduces an intermediary computational design and control system that translates architectural tower designs into manufacturable instructions for additive manufacturing equipment. This includes software for path planning, material deposition control, and real-time monitoring of the printing process, serving as a bridge between design and fabrication.
2Strength
If large wall thicknesses are used to withstand lateral forces, then tower strength is improved, but material and transportation costs increase
Solution Approach 1:
The patent applies local quality by varying the wall thickness and material distribution throughout the tower structure based on local stress requirements. Additive manufacturing enables non-uniform wall thickness profiles where thicker sections are placed only where structurally necessary to resist lateral loads, while thinner sections are used in lower-stress areas, optimizing material usage.
Solution Approach 2:
The patent employs composite materials, particularly reinforced concrete with embedded steel rebar or fibers, to achieve high strength-to-weight ratios. The additive manufacturing process allows for precise placement of reinforcement elements within the concrete matrix, creating optimized composite structures that withstand lateral forces with reduced material quantity.
3Stability of the object's composition
If tons of mass are added to the tower base for stiffness, then lateral force resistance is improved, but overall tower weight increases
Solution Approach 1:
The patent incorporates stiffness-enhancing features directly into the tower base design during the additive manufacturing process. Internal reinforcement structures, such as embedded steel frameworks or optimized rebar configurations, are placed in advance within the base concrete before final curing, providing the necessary stiffness without requiring excessive additional mass.
4Length of stationary object
If multiple tower sections are assembled on-site, then transportation limitations are overcome, but assembly time and costs increase
Solution Approach 1:
The patent divides the tower into multiple modular sections that are fabricated separately using additive manufacturing and then assembled on-site. Each section can be printed independently using portable 3D printing equipment, allowing for parallel fabrication and streamlined assembly processes that reduce overall construction time compared to traditional methods.
Data Source
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AI summary
A multi-material tower section (130) for a tower mast (102). The tower mast comprised of at least one multi-material tower section and a method for manufacturing the section. The section comprises at least one additively manufactured wall structure (132) comprised of at least one first material and a plurality of additively manufactured internal reinforcement structures (142) comprised of at least one additional material and disposed therewith the at least one additively manufactured wall structure.