摘要
铝合金隔水管(AAR)具有高比强度,在减轻重量的同时还可承受恶劣的海洋环境。涡激振动(VIV)是引起隔水管屈服失效与疲劳失效的主要因素,也是隔水管设计过程中需要考虑的主要问题。基于一种模态叠加方法预测隔水管的VIV响应,通过大量分析,系统研究了铝合金隔水管在不同流动剖面下的VIV响应与疲劳特性。结果表明,AAR的涡致疲劳损伤依赖于流动剖面的形状,且在不同位置处差别较大。长度增加导致隔水管模态频率与模态曲率降低,使得隔水管具有更好的VIV疲劳特性。与常规钢制隔水管(SR)相比,铝合金隔水管具有较好的VIV疲劳特性。
Aluminum alloy riser （AAR） has high specific strength, which can withstand the rigors of the offshore environment while reducing weight. The vortex-induced vibration （VIV） is the main cause of yield failure and fatigue failure for risers. Riser VIV response was predicted based on a mode superposition method. VIV response and fatigue characteristics of AAR subjected to different current profiles were systematically investigated through large amounts of VIV analysis. VIV fatigue damages of AAR depend on flow profile shapes, and vary significantly with position. The increased riser length lowers its mode frequency and mode curvature, thus a longer riser has better VIV fatigue characteristics. Compared with conventional steel riser （SR） , AAR has better VIV fatigue characteristics.
出处
《中国石油大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2008年第1期100-104,共5页
Journal of China University of Petroleum(Edition of Natural Science)
基金
国家高技术研究发展计划(863计划)项目(2006AA09A106-4)
关键词
深水
铝合金隔水管
涡激振动
VIV分析
疲劳损伤
deepwater
aluminum alloy riser
vortex-induced vibration （VIV）
VIV analysis
fatigue damage
