本文用有限元方法编制了空间刚架计算机程序。用此程序计算了自行车架后三角的位移和应力。计算指出:自行车架后三角中,小拉杆的应力在所有诸构件中最大。此结论说明了工作中该构件最易于损坏的原因。本文也计算分析了上述结构采用不同节点接合时的应力分布状况。根据计算得出的结论,可供自行车设计工作者参考。 In this paper, finite element method has been developed for space rigid frame computer program. This procedure calculates the displacement and stress of the rear triangle of the bicycle frame. Calculations indicate that the stress of the small tie-rod in the rear triangle of the bicycle frame is the largest of all the components. This conclusion illustrates the reason that the component is the most vulnerable to damage during work. This paper also calculates and analyzes the stress distribution of the above structure with different joints. According to the calculated conclusion, for bicycle designers reference.