Modular Tower Casing for Wind Vibration and Radio Transparency
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Solution Overview
Problem
Existing single-tube towers suffer from wind-induced vibrations leading to fatigue and structural failures, require additional dampers increasing costs and reducing space, are bulky and costly to transport, and lack sufficient ventilation, necessitating frequent dismantling for equipment changes.
Innovation Solution
A telecommunications or broadcasting tower with a modular outer casing comprising a load-bearing structure and slats fixed to an outer skeleton, featuring openings to reduce wind-induced vibrations and allow signal passage, made of materials like wood or composite to minimize carbon footprint and facilitate easy equipment adaptation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a liquid damper is integrated at the top of the tower to increase total damping, then wind-induced vibrations are dampened, but the initial cost increases, maintenance cost increases, and space for equipment installation is reduced
Solution Approach 1:
The patent extracts the damping function from a complex liquid damper system and implements it through a simple geometric modification of the tower structure itself. The hollow cylindrical structure with specific diameter ratios provides passive aerodynamic damping without requiring additional damping devices, thereby eliminating maintenance costs and reducing structural complexity while maintaining vibration control
Solution Approach 2:
The tower structure serves its own damping needs through its geometric design. The hollow cylindrical shape with optimized diameter ratio creates aerodynamic effects that naturally dampen vibrations, eliminating the need for separate damping systems and reducing overall device complexity
2Shape
If the tower uses a closed single-tube structure for aesthetic integration, then landscape integration is improved, but ventilation is insufficient causing temperature increase and equipment failure
Solution Approach 1:
The patent applies the porous structure principle by incorporating a ventilation grille system into the hollow cylindrical tower body. The grille provides controlled openings that allow air circulation for cooling equipment while maintaining the overall aesthetic form. The grille acts as a porous element that balances thermal management needs with visual integration requirements
Solution Approach 2:
The tower structure is segmented into functional zones: the hollow cylindrical body for aesthetic integration, the ventilation grille for thermal management, and the equipment platform for device installation. This segmentation allows each component to optimize its specific function while working together as an integrated system
3Strength
If modules are made bulky for structural integrity, then strength is improved, but transport cost increases, delivery time increases, and carbon footprint increases
Solution Approach 1:
The patent employs a composite construction approach combining a hollow cylindrical shell with an internal equipment platform structure. This composite design provides the necessary structural strength while minimizing material quantity. The hollow cylinder offers high strength-to-weight ratio, and the integrated platform utilizes the internal space efficiently, reducing the need for additional supporting structures and steel consumption
Solution Approach 2:
The patent transitions from traditional bulky modular sections to a hollow cylindrical geometry that optimizes strength in all directions simultaneously. The cylindrical shape provides uniform structural performance without requiring excessive material, and the hollow interior creates usable equipment space that would otherwise be wasted volume, effectively utilizing the third dimension
4Reliability
If the tower structure is modified to reduce Von Karman vortex formation, then vibration is reduced, but windward surface area is reduced affecting structural stability
Solution Approach 1:
The patent utilizes the curved cylindrical geometry of the hollow tower structure to disrupt Von Karman vortex formation. The smooth curved surface creates different flow separation characteristics compared to flat or angular structures, naturally reducing vortex shedding. The curvature allows the structure to maintain full windward surface area while the aerodynamic shape minimizes harmful vibrations
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution reduces wind-induced vibrations, lowers carbon footprint, enhances aesthetic integration, and allows easy equipment modification without dismantling, improving structural stability and operational efficiency.
Implementation Method 1
a light wind is sufficient to generate a Von Karman vortex path and vortex shedding at the rear of the tower, which generates vibrations
Data Source
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Figure 2b
AI summary
The invention relates to a telecommunications or broadcasting tower (1) comprising a load-bearing structure (2) configured to be anchored to a foundation element (F), the tower (1) housing at least one radio device (E) and also comprising a modular outer casing (3) comprising: an outer skeleton (31) attached to the load-bearing structure (2), and a plurality of slats (32) attached to the outer skeleton (31). The outer casing (3) extends at least opposite the at least one radio device (E), the outer casing (3) comprising, opposite the at least one radio device (E), at least one of the slats made of radio-transparent material and a cutout forming an opening in the outer casing (3). The invention also relates to a method for upgrading a tower according to the invention and a method for retrofitting an existing tower.