Tension Line Dynamics Management for Structural Oscillation
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Solution Overview
Problem
Load-bearing structures often experience dynamic oscillations due to off-axis flexibility, leading to performance loss and structural damage, with conventional solutions either limiting performance, adding weight, or increasing cost.
Innovation Solution
A dynamics management system comprising a line with a tension resistance device that generates different forces based on tension and compression, traversing Z-shaped paths within the structure to control oscillations, using a line that is rigid in tension and flexible in compression, coupled with inflection points and a resistance device that applies varying forces to dampen motion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If reinforcement is added to a structure to limit its flexibility, then structural strength is improved, but weight increases
Solution Approach 1:
The invention changes the physical state of the damping line from flexible to rigid through tensioning. The line transitions from a compliant state to a rigid restraining element when tension is applied, providing structural reinforcement without adding permanent mass to the structure.
Solution Approach 2:
The system dynamically adjusts the rigidity of the damping line based on operational conditions. The line is flexible during normal operation but becomes rigid when tension forces are applied, allowing the structure to gain strength only when needed rather than being permanently reinforced.
2Reliability
If mass or mechanisms are added to change the structure's dynamic behavior, then dynamic performance is improved, but weight increases
Solution Approach 1:
The invention changes the physical state of the damping line from flexible to rigid through tensioning. The line transitions from a compliant state to a rigid restraining element when tension is applied, providing structural reinforcement without adding permanent mass to the structure.
Solution Approach 2:
The invention extracts only the essential damping function from complex mechanical mechanisms. By using a simple tensioned line that becomes rigid under load, it achieves dynamic control without the weight of traditional mechanical damping mechanisms.
3Reliability
If a tension resistance device is used to generate damping forces, then oscillation control is improved, but device complexity increases
Solution Approach 1:
The tension resistance device exploits the non-linear parameter change of the damping line as it transitions from flexible to rigid under tension. This parameter change automatically provides the required damping forces without complex control mechanisms, maintaining simplicity while achieving effective oscillation control.
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 system effectively manages dynamic behavior by adding minimal mass and complexity, allowing for efficient control of oscillations in various elongate structures like wind turbine blades and towers, without compromising performance or increasing weight.
Implementation Method 1
A tension resistance device is coupled to a second location within the structure. The tension resistance device generates a first force when a tension force is applied thereto and generates a second force when the tension force is not applied thereto. The first force is greater than the second force.
Data Source
AI summary
A dynamics management system for a structure includes a line whose first end is coupled to a first location within a structure. A tension resistance device is coupled to a second location within the structure. The tension resistance device generates a first force when a tension force is applied thereto and generates a lesser second force when the tension force is not applied thereto. The second end of the line is coupled to the tension resistance device wherein the first force is applied to the line when it is in tension and the second force is applied to the line when it is not in tension. The line traverses at least one Z-shaped path within and in a plane of the structure. The line is coupled to the structure at each inflection point of the Z-shaped path(s) for supporting movement of the line there along.