Compressive Damping Member Between Frames for Vibration Reduction
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Solution Overview
Problem
Existing damping structures for reducing vibration in frames, such as those used in office equipment and construction materials, face challenges including increased component count, difficulty in installation due to rigid damping steel plates, high costs, and limited effectiveness for high-frequency mechanical vibrations.
Innovation Solution
A damping structure comprising a first frame with a driving portion, a second frame facing the first frame, and a projecting portion with a damping member compressively held between them, where the damping member has a lower rigidity than the frames and a loss factor of 0.05 or more, effectively converting vibration energy into thermal energy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a damping member is pasted on the surface of the vibrated member, then the vibration of the vibrated member is reduced, but the number of components increases and the installation becomes complex
Solution Approach 1:
The damping member is integrated between the first frame and second frame, merging the damping function into the frame connection structure itself, thereby reducing the number of separate components while maintaining vibration reduction effectiveness
Solution Approach 2:
The damping member serves multiple functions: it connects the first frame and second frame while simultaneously providing vibration reduction, making the structure multi-functional and reducing overall component count
2Reliability
If a damping steel plate is used, then the vibration reduction effect is enhanced, but the installation becomes difficult due to the hardness of the steel plate
Solution Approach 1:
The damping member uses a material with appropriate rigidity that is lower than the frames, changing the physical parameter from hard steel plate to a softer damping material, thereby enabling easier installation through bending and forming operations
Solution Approach 2:
The damping member appears to be a composite or specially formulated material that provides both damping effectiveness and formability, combining the benefits of vibration reduction with ease of installation
3Object-generated harmful factors
If a beam is installed between two sides of the thin metal plate, then the echo sound is reduced, but the installation position is limited and the cost increases due to the wide area required
Solution Approach 1:
Instead of installing a beam between two sides of the plate (one-dimensional approach), the damping member is installed between two frames in a different spatial arrangement, utilizing another dimension for vibration reduction while avoiding position limitations
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 configuration significantly reduces sound pressure levels and vibration levels across a wide frequency range, offering a cost-effective and efficient vibration reduction solution with a simpler installation process compared to traditional methods.
Implementation Method 1
a damping member compressively held between the projecting portion and the other frame... has a loss factor, measured by a mechanical impedance method in the state being compressed between the projecting portion and the other frame, of 0.05 or more
Data Source
AI summary
A damping structure includes a first frame on which a driving portion is mounted, a second frame provided at a position facing the first frame in a state being connected with the first frame, a projecting portion provided projectively from one frame toward the other frame of the first and second frames, and a damping member compressively held between the projecting portion and the other frame. The damping member has rigidity lower than rigidities of the first and second frames and of the projecting portion and has a loss factor, measured by a mechanical impedance method in the state being compressed between the projecting portion and the other frame, of 0.05 or more.