Threaded Connection Vibration Damping via Contact Surface Segmentation
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Solution Overview
Problem
Threaded connections experience energy loss due to microsliding, which is a significant vibration-damping mechanism, and existing solutions do not effectively enhance energy losses for improved damping.
Innovation Solution
The configuration of contact surfaces in threaded connections is modified by using an insert with specific geometries, such as quadrilateral, recessed, or circular surface configurations, to increase the area of contact pressure, thereby increasing energy losses through microsliding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the contact surface configuration is modified to increase the area of contact pressure, then energy losses during microsliding increase and vibration damping improves, but the complexity of the connection increases due to inserts or surface modifications
Solution Approach 1:
The contact surface is divided into multiple discrete contact zones separated by voids or recesses, rather than being a continuous surface. This segmentation increases the total area of contact pressure application points while maintaining a relatively simple overall structure, thereby increasing energy dissipation through microsliding without proportionally increasing complexity
Solution Approach 2:
The contact surface configuration is locally modified in specific areas (creating recesses, voids, or altered topography) rather than uniformly changing the entire surface. This allows concentrated contact pressure in strategic locations to maximize microsliding energy loss while minimizing the overall structural complexity
2Loss of energy
If the contact surface configuration is modified using inserts or recesses, then the area affected by shear forces increases and vibration damping improves, but the manufacturing complexity increases
Solution Approach 1:
The contact surface is segmented into discrete contact zones that can be manufactured as separate features or integrated into the base material through relatively simple processes, balancing the increased energy dissipation capability with manufacturing feasibility
Solution Approach 2:
Inserts or modified surface features are integrated within the existing connection structure, nesting the vibration-damping functionality within the conventional connection geometry to minimize additional manufacturing steps
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 modified contact surface configurations enhance energy losses during microsliding, leading to improved vibration damping in threaded connections by increasing the surface area affected by shear forces.
Implementation Method 1
energy loss caused by microsliding in the connection
Implementation Method 2
The energy loss caused by microsliding in threaded connections is the most important vibration-damping mechanism
Implementation Method 3
a deformable member provided for limiting an extension of the joint in the direction of a load path derived from an impact
Data Source
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AI summary
Method for vibration damping in a threaded connection joining together at least two components which are connected by the threaded connection and each have their respective contact surface facing that of the other. The method is particularly distinguished by the step of modifying the topology of the contact pressure by adapting the configuration of contact surfaces in order to increase the energy loss caused by microsliding at the contact surfaces of the connection which are subject to contact pressure.