含非贯穿直裂纹管道的振动特性分析

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振动与冲击 ›› 2011, Vol. 30 ›› Issue (4) : 21-25.

论文

含非贯穿直裂纹管道的振动特性分析

胡家顺1;冯新2;周晶2

作者信息 +

Vibration characteristics analysis of pipe with a part-through straight front crack

Hu JiaShun1 ; Feng Xin2 ; 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，推导了管道在轴力、剪力和弯矩等荷载作用下由非贯穿直裂纹引入的附加局部柔度，利用适应性Simpson数值积分编写了局部柔度计算程序，克服了当前方法仅针对特定的荷载模式或非空心截面的缺陷，通过与Naniwadekar等人试验结果进行对比验证本文局部柔度系数的合理性。建立了裂纹管结构的有限元模型，对悬臂裂纹管和简支裂纹管的自由振动特性进行了分析。研究结果表明：裂纹位置、裂纹深度对裂纹管类结构的自振频率影响明显。

Abstract

Abstract: The local flexibility equations of the pipe with a crack that straight front and part-through-the-thickness 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. These conquer the shortcoming that existing methods usually apply for calculating special load or non-hollow structure. The model test results from Naniwadekar et al were used to validate the accuracy of the proposed local flexibilit. Moreover, a finite element model for cracked pipe was established to conduct the vibration analysis for cracked pipe-like structure. The vibration characteristics of a cantilever pipe and a simple support pipe were analyzed. The results show that crack location, crack severity all have influence on the natural frequencies of cracked pipe-like structure.

导出引用

胡家顺;冯新;周晶. 含非贯穿直裂纹管道的振动特性分析[J]. 振动与冲击, 2011, 30(4): 21-25

Hu JiaShun;Feng Xin;Zhou Jing. Vibration characteristics analysis of pipe with a part-through straight front crack[J]. Journal of Vibration and Shock, 2011, 30(4): 21-25