Numerical analysis of dynamic characteristics of the graphite heat exchange tube with half-ellipse cracks

摘要：

The dynamic characteristics of graphite heat exchange tube with a half ellipse surface crack are studied in this paper.The stress intensity factor of the annular sectional crack is obtained by using analytical interpolation method and numerical integral method,the additional strain energy caused by the cracks is obtained by integral,and the stiffness matrix of the element with crack is deduced. The dynamic characteristics of the tube with crack are numerically calculated by using the finite element method in software MATLAB. The research conclusions are helpful for the vibration inspection and diagnostic study of tubular heat exchangers.

关键词： Graphite heat exchange tube Crack Dynamic characteristics Finite element method

作者: Qiwu Dong Yanan Li Ke Wang Yongqing Wang

作者单位: Thermal energy engineering research center of Zhengzhou University,Zhengzhou 450002,China

会议类型: 国际会议

会议名称: Fracture Mechanics and Applications 2008(国际断裂力学2008年年会)(FM2008)

会议地点: 杭州

会议语种:英文

页码: 133-137

在线出版日期: 2008-10-31（万方平台首次上网日期，不代表论文的发表时间）