基于频域法的深水钻井隔水管波激疲劳分析

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振动与冲击 ›› 2013, Vol. 32 ›› Issue (11) : 7-11.

论文

基于频域法的深水钻井隔水管波激疲劳分析

刘秀全, 陈国明, 畅元江, 刘康，杨焕丽

作者信息 +

Wave-loading fatigue analysis of deepwater drilling risers in frequency domain

LIU Xiu-quan, CHEN Guo-ming, CHANG Yuan-jiang, LIU Kang, YANG Huan-li

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摘要

波激疲劳失效是深水钻井隔水管的主要失效模式之一，隔水管波激疲劳分析能有效指导隔水管疲劳设计与疲劳寿命管理，提高隔水管使用寿命。在频域内建立深水钻井隔水管波激振动分析方法和波激疲劳计算方法，采用MATLAB软件编写深水钻井隔水管波激疲劳频域求解器，以我国南海某井为例进行基于频域法的隔水管波激疲劳寿命计算，并与时域法计算结果进行对比。结果表明：隔水管系统频域动态分析经过数步迭代即收敛，相比隔水管时域动态响应分析频域法大大提高分析效率；隔水管系统响应是一个宽带过程，进行隔水管系统疲劳寿命计算时需要采用雨流修正系数进行修正；基于时域法和频域法的波激疲劳损伤计算结果基本相同，提出的隔水管频域疲劳分析方法可以用作隔水管的初步疲劳分析。

Abstract

Wave-loading fatigue failure is one of main failure modes of deepwater drilling riser. Wave-loading fatigue analysis of riser provides guidance for fatigue design and management of riser in order to increase its service life. Methods for analyzing wave induced vibration and fatigue were established in frequency domain. Solver for riser fatigue calculation was developed based on MATLAB software. Wave-loading fatigue of the riser system in the South China Sea was calculated in frequency domain and compared with calculated fatigue based on time domain method. The results show that dynamic analysis of riser in frequency domain reaches convergence after several iteration steps. Compared with time domain method, frequency domain method enhances computation efficiency greatly. The response of riser system is a wide-band process so rainflow correction coefficient should be used in calculating riser fatigue. The wave-loading fatigue damage of riser in frequency domain is almost same with that in time domain. Riser fatigue analysis method proposed in this paper can be used for inertial fatigue analysis.

导出引用

刘秀全;陈国明;畅元江;刘康;杨焕丽. 基于频域法的深水钻井隔水管波激疲劳分析[J]. 振动与冲击, 2013, 32(11): 7-11

LIU Xiu-quan;CHEN Guo-ming;CHANG Yuan-jiang;LIU Kang;YANG Huan-li. Wave-loading fatigue analysis of deepwater drilling risers in frequency domain[J]. Journal of Vibration and Shock, 2013, 32(11): 7-11