Tension Device for Floating Structures
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Solution Overview
Problem
Existing methods for securing floating structures, such as boats, with simple lines or ropes often fail due to repeated cycles of slack and tension caused by wind and wave action, leading to potential damage or loss of anchor purchase.
Innovation Solution
A tension device comprising an elastic member and an inelastic member, where the elastic member is stretchable and the inelastic member limits its elongation, featuring tubular construction with enlarged ends and material webbings that convert pulling forces into torque, ensuring secure attachment between a floating structure and a fixed point.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If simple lines or ropes are used to secure a floating structure, then the device complexity is low, but the reliability of securing is poor due to repeated slack and tension cycles
Solution Approach 1:
The tension device is divided into distinct functional segments: an elastic member for shock absorption, an inelastic member for maintaining tension, and end members for attachment. This segmentation allows each component to perform its specific function optimally, resolving the contradiction by improving reliability through functional specialization while keeping the overall device relatively simple.
Solution Approach 2:
The device combines elastic and inelastic materials in a composite structure. The elastic member (e.g., rubber or bungee cord) absorbs shocks and accommodates floating, while the inelastic member (e.g., polyester webbing or chain) maintains constant tension. This composite approach improves securing reliability by leveraging the complementary properties of different materials without significantly increasing device complexity.
2Reliability
If elastic lines are used to secure a floating structure, then the reliability improves by reducing slack and tension cycles, but the device complexity increases compared to simple lines
Solution Approach 1:
The patent merges the functions of elastic lines and inelastic tension members into a single integrated device. The elastic member handles shock absorption and floating, while the inelastic member provides constant tension, combining the benefits of both approaches into one unified securing device that improves reliability without requiring multiple separate components.
3Ease of operation
If the elastic member is allowed to stretch freely, then the ease of operation is improved by accommodating floating, but the harmful factors increase due to excessive tension and potential damage
Solution Approach 1:
The device employs dynamic tension control where the elastic member can stretch to accommodate floating and movement, but the inelastic member dynamically limits the maximum tension. This dynamic system allows the device to adapt to changing conditions - providing flexibility when needed while preventing excessive tension that could cause damage, thus resolving the contradiction between ease of operation and harmful factors.
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 tension device provides enhanced security and stability by maintaining tension without causing damage, effectively resisting wave and wind-induced slack, thereby ensuring a consistent and secure attachment between floating and fixed structures.
Implementation Method 1
The elastic member is stretchable under tension from an unstretched length to a stretched length
Implementation Method 2
The loop of material webbing of both of the first and second end members is twisted between the respective first and second ears to convert a pulling force on the respective end member to a torque/construction force
Data Source
AI summary
A tension device for securing a floating structure includes an elastic member, first and second end members, and an inelastic member. The elastic member is stretchable under tension from an unstretched length to a stretched length. The first and second end members are carried at first and second ends of the elastic member, respectively. The inelastic member is secured to the first and second end member and limits the stretched length of the elastic member. First and second restrictive apertures are limited in diameter by first and second sewn portions of the inelastic member, respectively. The first and second restrictive apertures prevent separation between the inelastic member and the first and second ends of the elastic member, when the tension device is loaded in tension.