海洋平台管线振动控制研究

Vibration Analysis of Pipelines on Offshore Platforms

海上油田钻井平台由于面积狭小,大型设备众多,而产生强烈的振动和噪声。设备工作振动频率与管线设施等结构固有频率一致时,会发生共振,导致产生疲劳破坏,管线焊缝开裂。文中对渤海某油田海上钻井平台一段注水放空管线焊缝开裂原因进行了分析,指出注水泵叶轮频率脉动与该段管线固有频率一致,产生了共振,从而导致了疲劳破坏,并给出了改进措施。

Due to its small area and numerous large-scale equipment,offshore oilfield drilling platforms generate strong vibration and noise.When the working vibration frequency of the equipment is consistent with the natural frequency of pipeline facilities and other structures,resonance will occur,resulting in fatigue damage and cracking of pipeline welds.This paper analyzes the causes of weld cracking in a section of the water injection and venting pipeline of an offshore drilling platform in Bohai Sea.It is pointed out that the frequency pulsation of the impeller of the water injection pump is consistent with the natural frequency of this section of the pipeline,resulting in resonance and fatigue failure.Improvement measures are given.