Multi-Directional Shaker Fixing Device for Structure Testing
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Solution Overview
Problem
Existing fixing devices for vibrators are limited in their ability to vibrate structures from multiple directions, particularly lacking the capability to vibrate from above, below, and the sides, which is necessary for comprehensive vibration characteristics testing of large structures like bridges.
Innovation Solution
A fixing device with a base, a first shaft member, and a second shaft member that is movable in both vertical and horizontal directions, allowing a vibrator to be attached and positioned for vibration in various orientations, including vertical, horizontal, and diagonal directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a vibrator is fixed in a single orientation, then the device structure is simple, but the vibrator cannot vibrate the structure from multiple directions (above, below, sides)
Solution Approach 1:
The patent introduces a second shaft member that extends in a second direction orthogonal to the first direction, enabling the vibrator to be positioned not only in the vertical direction (first direction) but also in the horizontal direction (second direction). This dimensional expansion allows vibration from multiple directions including above, below, and sides of the structure.
Solution Approach 2:
The second shaft member is made movable relative to the first shaft member, allowing dynamic adjustment of the vibrator's position and orientation. This mobility enables the fixing device to adapt to different testing requirements by repositioning the vibrator along the second direction while maintaining structural support.
2Force
If an impulse hammer is used to apply vibration, then the device is simple and portable, but the excitation force is significantly attenuated on large structures
Solution Approach 1:
The patent combines the advantages of both impulse hammers and fixed vibrators by allowing the vibrator to be positioned in multiple directions. The vibrator provides sustained excitation force for large structures while the multi-directional positioning capability enables comprehensive vibration testing from various orientations, effectively merging the portability of impulse hammers with the force capability of fixed vibrators.
3Adaptability or versatility
If a vibrator is installed to vibrate structures from multiple directions, then comprehensive vibration testing is enabled, but the fixing and positioning becomes more complex
Solution Approach 1:
The fixing device is segmented into two independent shaft members: a first shaft member for vertical direction positioning and a second shaft member for horizontal direction positioning. This segmentation allows each shaft to be independently adjusted and positioned, simplifying the overall operation by breaking down the complex multi-directional positioning task into two simpler, independent adjustment steps.
Data Source
AI summary
A fixing device (1) according to the present disclosure includes: a base (11); a first shaft member (12) that is provided on the base (11) and extends in a first direction; and a second shaft member (13) that is attached to the first shaft member (12), extends in a second direction orthogonal to the first direction, is movable in the first direction and the second direction with respect to the first shaft member (12), and to which a vibrator (2) is attached.