Especially it is easy to make errors in drawing internalforcediagram 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。
2
To learn engineering mechanics and do engineering computation, we must master the drawing methods of internalforcediagram.
要学好工程力学，进行工程计算，必须掌握好内力作图方法。
3
In mechanical project calculation, drawing internalforcediagram is very important. With respect to complex internalforcediagram, this paper presents some simplification methods of drawing.