摘要
对埕岛油田服役中后期的海洋平台在动冰力作用下的疲劳强度进行了计算分析,以保证海洋平台在服役期间的结构安全。依据Maattanen自激振动冰力模型,分析了平台结构产生冰激自激振动的条件;基于SACS程序建立了现役在位平台有限元计算模型,进行了平台的冰激振动疲劳分析;探讨了海冰自激冰力和结构振动的响应特性,并比较了平台在不同冰况下的动力响应。结果表明,当海冰引起自激振动时平台结构响应显著增大。最后通过疲劳分析得出平台在服役中后期冰激动载荷下强度满足要求。
Fatigue analysis, considering ice load, on offshore platforms which are in intermediary and later stage of service life in Chengdao oil field is carried out. Based on SACS program, an inplace offshore platform finite element model is established and ice-excited dynamic responses of platform under different ice parameters are investigated. It shows that the dynamic displacement, base shear and overturning moment increasing sharply when self-vibration of platform happens. And service life of platform satisfies the request according to fatigue life estimation.
出处
《石油矿场机械》
2008年第3期56-61,共6页
Oil Field Equipment
关键词
海洋平台
动冰力
自激振动
疲劳寿命
offshore platform
dynamic ice load
self-excited vibration
fatigue life
