杆件内力计算的简捷方法

工程力学中杆件内力计算的简捷方法是指利用截面左右侧上的外力直接计算内力.根据杆件发生不同的基本变形,可以归纳为:杆件某一截面上的内力等于截面一侧所有外力在沿杆轴线方向或垂直杆轴线方向上投影的代数和,或所有外力对截面形心的力矩的代数和.

The Direct Method For the Calculation of the Inner Forces of Rod

The direct method for the calculation of the inner forces of rod i n engineering mechanics is defined as the method to calculate the inner forces d irectly by using the outer forces acting on two sides of the rod. According to d ifferent deformations of the rod, the direct method of the calculation referred to the inner force of a certain section of rod equal to the algebraic sum of th e projections of all outer forces acting on one side of the section or equal to the algebraic sum of the momentum of all outer forces about the shape center of the section.