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摘要：按相贯线裁剪制作结构模型，可大量节省构件连接时的材料用量，是结构模型质
量优化的一个重要途径。讨论了在模型制作过程中常见的两杆相贯和三杆相贯的情况，利用圆
柱坐标矩阵旋转变换的方法，构建了相贯线及其展开曲线的方程，分析了使用相贯线进行杆件
剪裁的方法，将该方法应用于结构模型制作过程，可使模型在质量上得到了很大优化。
Abstract: Weight is an important indicator to evaluate a model in structure model design contest.#br# Intersecting curve cutting is an efficient way to save material content. This method is widely used in#br# plate work. In this paper, how to use the method of intersecting curve cutting to make paper structure#br# model is discussed. Two cases are analyzed that is two intersecting pipes and three intersecting pipes.#br# The geometric relationship and coordinate transformation are used to derive the expansion formula.#br# The developed curve of intersecting curve can be drawn accurately and conveniently. Practice of#br# model-making process shows the model has been greatly optimized in weight.
