贯穿裂纹管局部柔度的广义求解方法研究  

Study on Generalized Solution of the Local Flexibility of Pipe with a Through Crack

作　　者：刘朵[1] 朱彤[1] 胡家顺[1] 周晶[1] 

机构地区：[1]大连理工大学,大连116023

出　　处：《中国海洋平台》2010年第4期25-31,共7页China offshore Platform

摘　　要：根据应变能释放原理并结合转动力学扩展了基于局部柔度的裂纹模型理论,推导了含有任意方向裂纹的贯穿裂纹管在纯弯矩作用下的局部柔度方程,并利用Matlab编写了该方程的求解程序。为验证贯穿裂纹管局部柔度方程的正确性,利用有限元分析软件ANSYS建立了裂纹管的有限元模型。理论计算值与有限元分析结果基本吻合,说明了弯矩作用下贯穿裂纹管局部柔度求解方法的合理性。In this paper, the crack model theory based on the local flexibility is extended combining the Strain Energy Release Principle with the rotordynamics. The local flexibility equations of a pipe under pure bending which contains a through crack at any angle is derived, which is solved by the program based on Matlab. A finite element model of crack pipe is established by the software ANSYS in order to verify the local flexibility equations. The theoretical results approximately agree with the numerical results, the method of local flexibility equations of a through crack pipe under pure bending is rationality.

关 键 词：损伤 贯穿裂纹 应变能释放原理 局部柔度 有限元 

分 类 号：O346[理学—固体力学]