Sub-rack Mounting Bracket Vibration Damping via Intermediate Flexure
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Solution Overview
Problem
Existing sub-rack mounting systems fail to effectively reduce vibration transmission to electrical device sub-racks during standardized tests, such as ETSI and ANSI tests, which can lead to equipment malfunction and failure.
Innovation Solution
A sub-rack mounting bracket with a planar first and second portion for coupling to the rack and sub-rack respectively, and an intermediate portion made of sheet material that reduces vibration amplitude by allowing flexing in perpendicular directions, potentially featuring bends or curves, to absorb and dissipate vibrational energy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a rigid mounting bracket is used to securely mount the sub-rack to the rack, then the mounting stability is improved, but the vibration transmission to the sub-rack increases
Solution Approach 1:
The mounting bracket is divided into three distinct portions: a first portion for coupling to the rack, a second portion for coupling to the sub-rack, and an intermediate portion that acts as a vibration-reducing element between them. This segmentation allows the bracket to simultaneously provide secure mounting and vibration isolation by separating the rigid connection functions from the vibration damping function.
Solution Approach 2:
The intermediate portion serves as a mediator between the rack and sub-rack, specifically designed to reduce vibration amplitude while maintaining structural connection. This intermediate element absorbs and dampens vibrations transmitted from the rack to the sub-rack, preventing direct rigid coupling that would transmit harmful vibrations.
2Object-affected harmful factors
If vibration reduction features are added to the mounting bracket, then the vibration transmission is reduced, but the device complexity increases
Solution Approach 1:
Only the intermediate portion of the mounting bracket incorporates vibration-reducing features such as bends, curves, or non-rigid material properties, while the first and second portions maintain simple planar structures for secure coupling. This localized application of complexity minimizes overall device complexity while achieving the desired vibration reduction effect.
Solution Approach 2:
The intermediate portion utilizes changes in material parameters (such as using a more flexible material) or geometric parameters (such as incorporating bends or curves) to achieve vibration damping. This allows vibration reduction without fundamentally changing the overall bracket structure or adding complex mechanisms.
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 solution significantly reduces vibration amplitude transmitted to the sub-rack, enhancing its stability and performance during testing and operational conditions, thereby improving the reliability of electrical device assemblies.
Implementation Method 1
an intermediate portion arranged between the first portion and the second portion, and formed of a sheet material shaped so as to reduce the amplitude of vibrations transmitted to the sub-rack through the sub-rack mounting bracket during use
Implementation Method 2
the intermediate portion of the sub-rack mounting bracket enables flexing of the sub-rack mounting bracket relative to at least one of the rack and the sub-rack in response to vibrations
Data Source
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AI summary
The present invention relates to a sub-rack mounting bracket for mounting an electrical device sub-rack to an electrical device rack, and to an assembly containing the sub-rack mounting bracket. The invention provides a sub-rack mounting bracket for mounting an electrical device sub- rack to an electrical device rack. The sub-rack mounting bracket has an intermediate portion arranged between a first planar portion and a second planar portion of the mounting bracket. The first portion, second portion and intermediate portion extend throughout the length of the mounting bracket. The Intermediate portion is formed of a sheet material shaped so as to reduce the amplitude of vibrations transmitted to the sub-rack through the sub-rack mounting bracket during use. The invention also provides an assembly of an electrical device sub-rack and at least one sub- rack mounting bracket in accordance with an embodiment of the invention secured to the electrical device sub-rack.