Abstract: This paper improved and optimized the cross-section of door sealing strip to address the issue of high door closing force during closing the light truck door. A compression simulation model with a sealing strip length of 100 mm is established using nonlinear finite element analysis software. The compression displacement and compression force variation law of the sealing strip at different locations of the door are simulated and analyzed. When the door is closed, the maximum compression force of the sealing strip is located in the middle of the upper end of the door, with a compression displacement of 8.34 mm and a compression force of 4.07 N. Based on the section and its strain contour distribution at the maximum compression force, the section is optimized. The optimized section decreased the compression displacement, compression force and maximum strain by 21.10%, 82.06% and 63.09%, respectively. This indicated that the closing force of the light truck door could be significantly reduced using the optimized section of sealing strip.

Key words: door sealing strip; compression displacement; compression force; section optimization

摘要： 文章以某型轻卡车门密封条为研究对象，改进和优化了密封条的截面形状，以达到降 低车门关闭力的目的。运用非线性有限元分析软件建立了长度 100 mm 的密封条压缩仿真模 型，模拟分析了车门不同位置的密封条在车门关闭过程中的压缩位移和压缩负荷变化规律。 当车门关闭时，密封条压缩负荷最大的位置出现在车窗上端的中间，此时的压缩位移为 8.34 mm，压缩负荷为 4.07 N。以车窗上端中间位置的密封条截面形状为基础，根据压缩过程 中密封条的应变云图分布，对其截面形状进行优化。结果表明，采用优化之后的密封条截面 形状，可以使压缩位移、压缩负荷和最大应变分别降低 21.10%、82.06%和 63.09%，优化的 截面形状能够显著降低车门关闭力。

关键词: 车门密封条；压缩位移；压缩负荷；截面形状优化