含圆周非贯穿裂纹悬臂管道的振动分析与裂纹识别

PDF(1386 KB)

振动与冲击 ›› 2011, Vol. 30 ›› Issue (5) : 18-22.

论文

含圆周非贯穿裂纹悬臂管道的振动分析与裂纹识别

胡家顺1;孙文勇1;周晶2

作者信息 +

Vibration analysis and crack identification of cantilever pipe with a circumferential part-through crack

Hu JiaShun1; Sun WenYong1; Zhou Jing2

Author information +

文章历史 +

摘要

摘要：根据线性断裂力学理论和应变能释放原理，推导了含圆周非贯穿裂纹管道在轴力、剪力和弯矩等荷载作用下的局部柔度系数方程，利用适应性Simpson方法编写了数值积分程序进行局部柔度系数求解，建立了含裂纹管道的二维有限元模型进行含裂纹悬臂管道的振动特性分析，应用等值线图原理进行了悬臂管道的裂纹识别。研究结果表明：本文裂纹模型克服了当前裂纹模型仅针对特定的荷载模式或非空心截面的缺陷，基于等值线图法能有效识别含裂纹悬臂管道的裂纹位置、深度。

Abstract

Abstract: The local flexibility equations of the pipe with a circumferential part-through crack that subjected to axial force, shearing force and bending moment were derived by using of theories of linear fracture mechanics and stress energy release principle. An adaptive Simpson quadrature-revisted was used to perform the numerical integration to obtain the flexibility coefficients. A finite element model for cracked pipe was established to conduct the vibration analysis for cracked cantilever pipe. In addition, crack identifiation for a cracked cantilever pipe was investigated based on contour plots of frequency ratio as function of crack location and crack depth. The results show that the proposed crack model conquers the shortcoming that existing models usually apply for calculating special load or non-hollow structure, and the contour diagram can identify crack location and depth effectively.

导出引用

胡家顺;孙文勇;周晶. 含圆周非贯穿裂纹悬臂管道的振动分析与裂纹识别[J]. 振动与冲击, 2011, 30(5): 18-22

Hu JiaShun;Sun WenYong;Zhou Jing. Vibration analysis and crack identification of cantilever pipe with a circumferential part-through crack[J]. Journal of Vibration and Shock, 2011, 30(5): 18-22