摘要
平台运动是深水钻井隔水管系统波激疲劳的主要来源之一。传统的隔水管波激疲劳分析不考虑或简化钻井平台运动,为了更精确地评估隔水管系统波激疲劳损伤,建立了深水钻井平台-隔水管耦合系统动力学模型及波激疲劳损伤评估方法,开展了动力定位和锚泊定位模式下的隔水管系统动力学响应及疲劳损伤分析,深入揭示深水钻井隔水管系统波激疲劳动力学特性。结果表明,两种定位模式下的平台-隔水管系统受波浪载荷的影响,在常规波浪频率范围内发生波频振动,锚泊定位模式下的平台-隔水管系统还呈现一定的低频特性;两种定位系统下的深水钻井隔水管系统疲劳损伤最大值均发生在隔水管系统顶部,锚泊定位模式下的隔水管系统波激疲劳损伤变异系数较大,动力定位系统下的隔水管系统波激疲劳损伤较大。
The platform movement is one of the main causes of deep-water drilling riser system wave-loading fatigue,and it is not considered or merely simplified in traditional wave-loading fatigue analysis.In order to assess wave-loading fatigue damage accurately,a coupling dynamic model of deep-water drilling platform/riser system and an assessment method of drilling riser wave-loading fatigue damage were established.The analysis for dynamic response and fatigue damage of riser system under the DP positioning mode and the mooring positioning mode was carried out,and the dynamic characteristics of the wave-loading fatigue were revealed.The results show that random wave load affects the dynamic response of riser system in both models,and wave-frequency vibration occurs in the range of normal wave frequency.In the mooring positioning mode,the dynamic response of riser system presents low-frequency characteristics.In both modes,the maximum fatigue damage occurs at the top of riser system.The variation coefficient of riser system wave-loading fatigue damage under mooring positioning mode is larger,and the fatigue damage under DP positioning mode is larger.
作者
张慎颜
刘秀全
畅元江
陈国明
ZHANG Shen-yan;LIU Xiu-quan;CHANG Yuan-jiang;CHEN Guo-ming(Centre for Offshore Engineering and Safety Technology,China University of Petroleum,Qingdao 266580,China)
出处
《船舶力学》
EI
CSCD
北大核心
2019年第7期843-850,共8页
Journal of Ship Mechanics
基金
国家自然科学基金资助项目“深水钻井隔水管多体系统动力学及反冲控制研究”(51809279)
国家科技重大专项“深水隔水管-水下井口全寿命完整性技术及工程应用”(2016ZX05028-001-05)
国家重点基础研究发展计划(973)“深水海底井口-隔水管-平台动力学耦合机理与安全控制”(2015CB251203)
关键词
钻井隔水管
动力定位模式
锚泊定位模式
波激疲劳
疲劳损伤
drilling riser
DP positioning mode
mooring positioning mode
wave-loading fatigue
fatigue damage
