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›› 2014, Vol. 36 ›› Issue (4): 474-477.doi: 10.6052/1000-0879-13-197

• 应用研究 • 上一篇    下一篇

拉压弹性杆系小变形计算方法研究

李丽柏   

  1. 盐城工业职业技术学院机电工程系, 江苏盐城224005
  • 收稿日期:2013-05-21 修回日期:2013-10-17 出版日期:2014-08-08 发布日期:2014-11-13
  • 通讯作者: 李丽柏,副教授,从事理论力学和材料力学的教学和应用研究.E-mail:lilipo123@126.com E-mail:lilipo123@126.com

METHOD OF THE LINEAR ELASTIC BAR CALCAULATION UNDER SMALL DEFORMATION CONDITIONS

LI Libai   

  1. Department of Mechanical and Electrical Engineering, Yancheng Institute of Industry Technology, Jiangsu, Yancheng 224005, China
  • Received:2013-05-21 Revised:2013-10-17 Online:2014-08-08 Published:2014-11-13

摘要: 先用几何图解法对一简单线弹性杆系变形作分析计算,发现功能原理更可行有效. 方法是假设用一个和载荷P 相垂直的力H(虚拟力)先作用于杆系,根据功能原理导出在载荷P 作用下的位移计算公式. 并把这一方法推广到多个杆件组成的弹性杆系(桁架)中,并建立相应计算公式. 可望实现计算机编程,大大简化这一类问题的工程计算.

Abstract: This paper uses the work-energy theorem to solve the small deformation problems for a liner elastic bar. According to a geometric analysis of the deformations of a simple linear elastic bar, the work-energy theorem is found to be more effective for the purpose. A force H perpendicular to the loading force P is assumed to be applied to the bars before the loading of P, and based on the work-energy theorem, we can obtain the formula to calculate the displacement caused by P. This methodology can be extended to more complex elastic bar system such as a truss and the computer programming will be easy, which can greatly simplify the calculation of the small deformation of a truss.

中图分类号: 

  • TJ762.4