Rail-Unit Metamaterial Structure for Anisotropic Vibration Control
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Solution Overview
Problem
Current mechanical metamaterials for vibration control are either isotropic or mono-directional, failing to provide anisotropic vibration control necessary for applications like seismic protection, and face challenges in large-scale mass production due to their complex structures.
Innovation Solution
A vibration absorbing apparatus comprising a plurality of rail units arranged in a side-by-side or vertically stacked configuration, with each unit having a first plate with a slide rail and a second plate with a corresponding slot, connected by a resilient connector that can flex in both vertical and horizontal directions to maintain slidable engagement, allowing for anisotropic vibration control and scalable production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If complex internal structure is used to achieve anisotropic vibration control, then vibration control performance is improved, but manufacturing complexity increases and mass production becomes difficult
Solution Approach 1:
The apparatus is divided into multiple identical rail units, each comprising a first plate with slide rail, a second plate with slot, and a resilient connector. This segmentation allows the complex anisotropic vibration control function to be distributed across simple, repeatable modules that can be mass-produced independently and then assembled in various configurations to achieve the desired directional vibration control properties
Solution Approach 2:
The patent achieves different vibration control properties by changing the orientation parameters of the slots in different rail units rather than changing the fundamental structure. By orienting slots in different directions (e.g., 0 degrees, 45 degrees, 90 degrees) in different rail units within the array, the system provides anisotropic vibration control while maintaining identical simple structures that are easy to manufacture
2Adaptability or versatility
If identical rail units with oriented slots are used to provide anisotropic vibration control, then directional vibration control is achieved, but the structure becomes more complex compared to isotropic materials
Solution Approach 1:
Each rail unit introduces asymmetry through the slot orientation in the second plate relative to the slide rail direction in the first plate. This asymmetric slot-rail configuration allows the unit to exhibit different mechanical properties in different directions (anisotropy) while the unit itself remains a simple, manufacturable component. The overall anisotropic behavior of the apparatus emerges from the systematic arrangement of these asymmetric units
Solution Approach 2:
The rail unit design is universal and multi-functional: the same basic unit configuration (first plate, second plate, resilient connector) can be oriented at different angles and arranged in different patterns to provide vibration control for different directional requirements. This universality reduces manufacturing complexity since only one type of unit needs to be produced, while still achieving adaptable anisotropic vibration 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 apparatus effectively provides anisotropic vibration control, enabling high vertical bearing capacity and large lateral and longitudinal deformation with moderate restoring force, suitable for seismic isolation, while being cost-effective and mass-producible.
Implementation Method 1
An at least one resilient connector extends between the first and second plates and is configured for resiliently flexing in at least one of a vertical direction and a horizontal direction so as to maintain slidable engagement between the first and second plates
Data Source
AI summary
A vibration absorbing apparatus is disclosed for functioning as a practical mechanical metamaterial for anisotropic vibration control. In at least one embodiment, the apparatus provides a plurality of rail units positioned in a side-by-side arrangement so as to form at least one rail unit layer. Each rail unit provides a first plate and an opposing second plate slidably engaged with the first plate. The first plate provides at least one substantially linear slide rail extending therefrom. The second plate provides a corresponding at least one substantially linear slot sized for slidably receiving the corresponding at least one slide rail. At least one resilient connector extends between the first and second plates so as to maintain slidable engagement between the first and second plates. Additionally, the at least one slot of each rail unit of the at least one rail unit layer is oriented in substantially the same direction.