关于单位载荷法求解桁架杆件转角的讨论  

DISCUSSION ON SOLVING THE ROTATION ANGLE OF TRUSS MEMBER BY UNIT LOAD METHOD

作　　者：王乐[1] 杨智春[1] 王慧 WANG Le;YANG Zhichun;WANG Hui(School of Aeronautics,Northwestern Polytechnical University,Xi’an 710072,China;School of Science,Chang’an University,Xi’an 710064,China)

机构地区：[1]西北工业大学航空学院,西安710072 [2]长安大学理学院,西安710064

出　　处：《力学与实践》2025年第2期435-439,共5页Mechanics in Engineering

基　　金：西北工业大学教育教学改革研究项目(2023JGZ01,2024JGWZ01,2025JGZ02);中国交通教育研究会交通教育科学研究课题(JT2022YB363)资助。

摘　　要：通过一个桁架杆件转角的求解示例,介绍了单位载荷法求解桁架杆件转角的标准解法及两个误区,从结构力学的基本假设及单位载荷法的基本概念分析了其产生原因及应对办法,表明了理论及方法的基本假设和基本概念的重要性,可供教师讲授或学生学习结构力学和其他相关课程时参考。Through an example of solving the rotation angle of truss members,the standard solution and two misconceptions of using the unit load method to solve the rotation angle of truss member are introduced.The causes and solutions of the two wrong solutions are analyzed utilizing the basic assumptions of structural mechanics and the basic concepts of unit load method.It shows the importance of the basic assumptions and basic concepts of the theories and methods,and it can be used as reference for teaching and learning of structural mechanics and relative courses.

关 键 词：单位载荷法 桁架 转角 位移 虚力原理 

分 类 号：O342[理学—固体力学]