第3章 静定结构的受力分析 三、内力图 （internal force diagram） 1. 内力方程（equation of internal force）：截面法，静力平衡条件。
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Especially it is easy to make errors in drawing internal force diagram of a beam because the rules are too more to memory.
尤其是梁弯曲时内力图绘制的规律较多，不易记忆，容易出错。
To learn engineering mechanics and do engineering computation, we must master the drawing methods of internal force diagram.
要学好工程力学，进行工程计算，必须掌握好内力作图方法。
In mechanical project calculation, drawing internal force diagram is very important. With respect to complex internal force diagram, this paper presents some simplification methods of drawing.
在进行机械工程计算时，作构件的内力图是非常重要和不可缺少的环节。本文针对较繁锁的内力图，就画法的简化进行了探讨。
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