关键词: 螺钉连接, 快速仿真, 有限元分析, 松动失效

Abstract: To address the issue of loosening failure in the screw connections of the washing machine cabinet and door panel, a finite element simulation was conducted to study the relationship between tightening torque and pretension in the screw connection structure. A linear relationship between tightening torque and pretension was obtained, which can be used to assess the anti-loosening performance of the screws, and the factors influencing screw loosening were further analyzed. In response to the loosening failure issue, based on finite element simulation results of von Mises stress distribution for three types of screw fastening structures, a solution was proposed to replace the original screw type under existing conditions with double helix screws. Finally, the proposed solution was practically verified through static torque testing and long-term vibration experiments, providing guidance for the design of screw connections in washing machines.

Key words: Screw connection, Rapid simulation, Finite element analysis, Loose failure