前言在各种工程结构设计中,经常遇到各种类型的静定平面桁架,如何准确,迅速的求解出桁架中每个杆件的内力,在目前有二种方法:数解法与图解法。所有的静定平面桁架均可采用数解法求出各杆件的内力值,由于桁架结构形状不同,可分别采用不同的数解手段,如“节点法”“截面法”,“通路法”,“杆件代替法”等。这些方法的特点是:桁架中各杆的内力值通过计算得出数字的答案。图解法是把桁架各个杆件的内力,通过 Introduction In various engineering structure designs, various types of statically determinate planar trusses are often encountered. How accurately and quickly the internal forces of each member in the truss can be solved. There are currently two methods: numerical solution and graphical method. All statically determinate plane trusses can use the numerical solution method to find the internal forces of each member. Because of the different shapes of truss structures, different numerical solutions can be used, such as “nose method”, “cross section method”, and “path method”. “Pole replacement method” and so on. The characteristics of these methods are: the internal force value of each rod in the truss is calculated to obtain the digital answer. The graphic method is to pass the internal force of each member of the truss through