在弹性支承下,轴的应力分析比较复杂。这里介绍一种简便的计算方法,它是把一个结构分成两部分,根据叠加原理,通过计算几个分量的代数和的方法实现的。现举例说明如下。假设有一结构钢架,其四个顶点由弹性支承。其中三个顶点固定在工字梁的顶端,粱的扭矩忽略不计。用通用公式求轴的应力时,需先计算支承与梁之间的作用力 R。求 R 的方法,是将整个框架分成两部分。第一部分包括两根侧梁,两个向下的载荷和轴中部的向上反力 R;第二部分包括中 Under elastic support, the stress analysis of the shaft is complicated. Here is a simple calculation method, it is a structure is divided into two parts, according to the principle of superposition, by calculating the number of algebraic components and methods to achieve. An example is as follows. Suppose there is a structural steel frame with four vertices supported by springs. One of the three vertices is fixed at the top of the I-beam and the beam’s torque is neglected. When using the general formula to calculate the stress of the axis, the force R between the support and the beam needs to be calculated first. The method of seeking R is to divide the whole framework into two parts. The first part consists of two side beams, two downward loads and an upward reaction force R in the central part of the shaft. The second part includes a middle