Cable Damping Transfer Structure for Anchorage Vibration Control
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Solution Overview
Problem
Existing damping arrangements for cables, such as those in cable-stayed bridges, face challenges in effectively reducing vibrations while being aesthetically pleasing and cost-effective, especially when installed far away from the anchorage.
Innovation Solution
A damping arrangement comprising a rigid damping action transfer device connected to the cable at a predetermined distance from the anchorage, with at least one damping device extending between this transfer device and a constructional element connected to the anchorage, allowing for a shorter damping device and eliminating the need for an expensive framework.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the damping device is installed far away from the anchorage (at 4% of cable length), then the vibration damping effectiveness is improved, but the device requires expensive frameworks or becomes very long which reduces aesthetics and increases cost
Solution Approach 1:
The patent introduces a rigid damping action transfer device as an intermediary component between the cable and the damping device. This transfer device is connected to the cable at the optimal distance (4% of cable length) for vibration damping effectiveness, while the damping device itself can be positioned closer to the anchorage. The transfer device mediates the force transmission, allowing the damping device to be shorter and eliminating the need for expensive frameworks, thus resolving the contradiction between damping effectiveness and device complexity.
2Reliability
If the damping device is installed far away from the anchorage, then the vibration damping effectiveness is improved, but the cost increases due to expensive frameworks
Solution Approach 1:
The rigid damping action transfer device serves as a cost-effective intermediary that enables the damping device to be positioned closer to the anchorage while maintaining vibration damping effectiveness. This eliminates the need for expensive frameworks, directly addressing the cost issue while preserving the damping performance achieved through optimal connection point selection.
3Reliability
If the damping device is installed far away from the anchorage, then the vibration damping effectiveness is improved, but the aesthetic appearance deteriorates
Solution Approach 1:
The rigid damping action transfer device allows the damping device to be repositioned closer to the anchorage, creating a more compact and aesthetically pleasing arrangement. The transfer device maintains the effective connection point at the optimal distance for vibration damping while enabling the damping device itself to be positioned in a more visually acceptable location, thus resolving the contradiction between damping effectiveness and aesthetic appearance.
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
This solution allows for effective vibration reduction while reducing costs and improving aesthetics, with the option to mount the damping device steeper and shorter, and easier maintenance due to better accessibility.
Implementation Method 1
the force transmitting device may include a resilient element adapted and configured to be compressed between two compression plates so as to be expanded in a direction orthogonal to the plate planes of the compression plates, as a resilient element compressed in the afore-described manner shows a sufficient rigidity
Implementation Method 2
Damping devices for reducing vibrations in cables
Data Source
AI summary
The invention relates to a damping arrangement (100) for a cable (102) extending in a tensioned manner from an anchorage (108), said damping arrangement (100) comprising a rigid damping action transfer device (112) which is positively connected to the cable (102) at a predetermined distance (L1) from said anchorage (108), and at least one damping device (110) extending in a damping manner between said damping action transfer device (112) and a constructional element (106) rigidly connected to said anchorage (108), and connected to said damping action transfer device (112) at a further predetermined distance (L2) from said anchorage (108), said further predetermined distance (L2) being shorter than said predetermined distance (L1).