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两向地震波作用下导管架平台的受力分析
THE ANALYSIS OF OFFSHORE JACKET PLATFORM UNDER THE TWO DIRECTION SEISMIC WAVES
【摘要】 导管架海洋平台多为全钢制框架结构,处于海洋的复杂环境中要承受多种荷载的作用,其中地震荷载对于这些框架式的结构的威胁是尤为突出的。本文利用流-固耦合理论将导管架平台与海水进行耦合,并且在地震荷载作用下提取平台的位移、加速度和应力,与非耦合工况进行对比。数值仿真表明:①在两向地震波作用下平台的最大位移和加速度均发生在顶部;②经过和海水耦合的平台与非耦合结构相比振动位移有所增加,但加速度与应力却减少,说明海水对导管架海洋平台是有一定的减振和保护作用的。
【Abstract】 Offshore jacket platform are full steel frame structures,they support a variety of load in the complex ocean environment in which the threat of the earthquake load is particularly prominent.This paper coupled the offshore jacket platform with seawater by fluid-solid iteraction theory,and extracted displacement acceleration and stress under seismic load,then compared with uncoupled condition.Numerical simulation shows that: ① the maximum displacement and acceleration of the platform under two directions seismic waves occurred at the top;② comparing with the platform coupling with seawater and uncoupling it shows vibration displacement increase,but acceleration and stress reduce of coupling platform,and explains seawater can reduce damping of offshore jacket platform.
【Key words】 tall structures; fluid-solid interaction; seismic load; the numerical simulation;
- 【文献出处】 低温建筑技术 ,Low Temperature Architecture Technology , 编辑部邮箱 ,2013年06期
- 【分类号】P75
- 【下载频次】47