Optimization Analysis of Electromagnetic Shielding Anechoic Door Hinge_Hinge Knowledge_Tallsen 1

Expanding on the existing article, I will provide a more detailed analysis and explanation of the problem with ordinary sound-proof electromagnetic screen doors and the solutions that have been proposed.

Ordinary sound-proof electromagnetic screen doors are known to have a large self-weight and closing resistance. In addition, the hinges on these doors are easily deformed and damaged, which leads to unsatisfactory sound insulation and shielding performance. To address these issues, a comprehensive study was conducted on the screen door, hinges, and hinge shafts. Three-dimensional modeling and finite element analysis were employed to understand the distribution of stress, displacement, and safety factors of these components.

Through the analysis of the collected data and graphical parameters, the structure was redesigned and optimized to strengthen the strength of the hinges and hinge shafts. The strength of the hinge shaft was identified as particularly important for the overall performance of the door leaf applications.

Designing a soundproof screen door with weight reduction in mind was among the primary objectives. The frame of the door is typically made of rectangular steel pipe, using ordinary carbon steel, and filled with wooden boards for added insulation. To enhance the sound insulation effectiveness and reduce the weight of the door, thermal insulation cotton with a density of 30kg/m3 was used as filling, with a volume of 0.3m3.

After the initial production of the soundproof screen door, several issues were identified during inspection. Firstly, the hinges were difficult to turn and produced abnormal noises. Secondly, the door closing resistance was high and lasted for an extended period. To address these problems, a comprehensive analysis of the S81 and S201 hinges was conducted separately.

Under ideal conditions, motion analysis was performed on the S81 hinge. It was observed that when the door leaf and door frame formed an angle of approximately 25°, resistance started to appear during the closing action. As the door continued to close, a higher force was required to fully close it. When the S201 hinge was used instead of the S81 hinge, the problem was significantly improved. The S201 hinge was found to require less force and had a shorter duration of force application during the door closing process.

Based on these observations, it was concluded that the structure of the S201 hinge was more reasonable and better suited for workplaces requiring large door closing forces and superior sealing and sound insulation.

Subsequently, a detailed strength analysis was conducted on the S81 hinge structure. The 3D solid model of the hinge was created using SolidWorks software, and material properties were defined. Finite element analysis was performed on the hinge to understand its strength under various loads and working conditions.

The analysis showed that the maximum stress point occurred on the hinge shaft, close to the constraint end, reaching a value of 231MPa. This exceeded the allowable stress limit, indicating the need for material and structural redesign. The upper hinge shaft also had the minimum safety factor, indicating a need for improvement.

The upper and lower hinges were found to meet the strength requirements, while the hinge shafts required optimization. The upper hinge shaft was redesigned by increasing the diameter from 9.5mm to 15mm, resulting in a maximum stress point of 101MPa and a safety factor greater than 2. The lower hinge shaft was also thickened to 15mm and met the strength and safety requirements.

Verification of the hinge strength showed that both the upper and lower hinges met the actual needs, with maximum stress points of 29MPa and 22MPa, respectively.

In conclusion, this study successfully identified the issues with ordinary sound-proof electromagnetic screen doors and proposed solutions. Through comprehensive analysis, the strength and reliability of the hinges and hinge shafts were improved, meeting the required standards. These enhancements contribute to the overall performance and effectiveness of sound insulation and shielding in screen doors.