Perforated Plate Hole Profile for Sound Absorption and Strength
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Solution Overview
Problem
Existing perforated plates used as sound-insulating materials face challenges in maintaining sound absorbability while minimizing the number of through-holes to avoid strength deterioration and excessive perforating costs, with adjacent holes often interfering with each other.
Innovation Solution
The through-holes are shaped to swell outside a straight line connecting the largest and smallest diameters, reducing plate thickness and allowing for fewer holes without compromising sound absorbability, and improving strength and machining efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a solid plate is used to provide structural support, then strength is improved, but fluid flow through the plate is blocked
Solution Approach 1:
The plate is designed with an array of holes or perforations throughout its structure, transforming it from a solid non-porous material into a porous structure. This allows fluid to pass through the plate while the remaining solid material maintains structural integrity and support functionality.
2Productivity
If the plate is made porous to allow fluid flow, then fluid flow is improved, but structural strength deteriorates
Solution Approach 1:
The plate exhibits non-uniform hole distribution with varying hole sizes across different regions. Areas requiring higher structural strength have fewer or smaller holes, while areas prioritizing fluid flow have more or larger holes. This localized variation in quality optimizes both strength and flow performance in different zones of the plate.
3Productivity
If holes are added to the plate to enable fluid flow, then fluid flow is improved, but manufacturing complexity increases
Solution Approach 1:
The plate structure is segmented into multiple regions with different hole densities and patterns. This segmentation can be achieved through modular manufacturing processes or standardized drilling patterns, making the complex hole distribution more manageable and easier to manufacture compared to a completely uniform or highly variable design.
Data Source
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AI summary
This perforated plate is disposed so that air layer is formed between plate-shaped or wall-shaped blocking components and the perforated plate, and has a number of through holes. A through hole has the maximum diameter portion formed on one surface of the perforated plate and the minimum diameter portion formed on the other surface of the perforated plate. The through hole expands outward from a straight line connecting the maximum diameter portion and minimum diameter portion in cross-sectional view along the thickness direction of the perforated plate.