水下管线的流体振动分析

Flow Induced Vibration Analysis for Subsea Piping

内部流体流动导致的振动问题越来越受到水下生产系统设计的重视。分析研究了流动导致的振动原理,并给出常见FIV(流体导致的振动)振源。依据AVIFF(工艺管线中避免振动导致的疲劳失效指南),在流体导致的振动分析中,研究管道失效的可能性(LOF),并给出其计算分析的流程。在水下气田生产系统中FIV问题更为突出,本文选取南中国海某气田其中比较典型的M型水下跨接管进行实例分析,给出详细的工程实际计算方法和实际操作建议,分析了不同流速下LOF值,利用有限元方法计算跨接管在不同模态下的振动频率。文章最后指出未来水下管线FIV分析的趋势和方向。

It will be more and more important for design of subsea production system that internal flow induced vibration.Research on mechanisms of flow induced vibration in piping systems and general FIV sources.The screening approach used for subsea is based on the Guidelines for the avoidance of vibration induced fatigue failure in process pipework(AVIFF).The flow induced vibration analysis mainly research on calculation of likelihood of failure(LOF).The standard assessment flowchart for flow induced vibration.Flow induced pulsations and vibrations can cause serious design and production problems,especially in subsea gas production systems.The paper research on flow induced vibration of M type jumper in a gas field of South China Sea.The analysis method of flow induced vibration is described.Researching on flow induced vibration on the LOF in different flow velocities.The well jumper's vibration modes and frequency of the pipe system be used the finite element method to analyze.At last,the document shows that how can to develop FIV technology in future.