This paper presents a procedure to calculate the safety factor against sliding of a marine gravity structure subjected to a combination of static and cyclic loads. This procedure claculates the stress at the sliding s...This paper presents a procedure to calculate the safety factor against sliding of a marine gravity structure subjected to a combination of static and cyclic loads. This procedure claculates the stress at the sliding surface by the finite element method (FEM) and takes the dynamic properties of clay into account. With this procedure, the stability of a Bohai oil-drilling ship is analyzed. The calculated safety factor is much smaller than 1, indicating that this oil-drilling ship would fail just as what had happened to it.展开更多
钻井船漂浮在海面上时摇摆幅度大,相对固定式钻井船不能承受很大的倾覆力矩。甲板使用面积小,工作位置范围小,当风从燃烧器向平台方向吹时,燃烧器燃烧原油、天然气等易燃混合气体时散发的大量热能会辐射到船上。当热辐射强度过大时,会...钻井船漂浮在海面上时摇摆幅度大,相对固定式钻井船不能承受很大的倾覆力矩。甲板使用面积小,工作位置范围小,当风从燃烧器向平台方向吹时,燃烧器燃烧原油、天然气等易燃混合气体时散发的大量热能会辐射到船上。当热辐射强度过大时,会对在甲板上的工作人员造成伤害。文章将发明问题解决理论(Theory of the Solution of Inventive Problems,TRIZ)的功能模型分析和因果链分析、技术冲突矩阵和物理矛盾法等工具应用于钻井船的燃烧臂设计,设计出一种适用于钻井船的基座式回转变幅燃烧臂。展开更多
文摘This paper presents a procedure to calculate the safety factor against sliding of a marine gravity structure subjected to a combination of static and cyclic loads. This procedure claculates the stress at the sliding surface by the finite element method (FEM) and takes the dynamic properties of clay into account. With this procedure, the stability of a Bohai oil-drilling ship is analyzed. The calculated safety factor is much smaller than 1, indicating that this oil-drilling ship would fail just as what had happened to it.
文摘钻井船漂浮在海面上时摇摆幅度大,相对固定式钻井船不能承受很大的倾覆力矩。甲板使用面积小,工作位置范围小,当风从燃烧器向平台方向吹时,燃烧器燃烧原油、天然气等易燃混合气体时散发的大量热能会辐射到船上。当热辐射强度过大时,会对在甲板上的工作人员造成伤害。文章将发明问题解决理论(Theory of the Solution of Inventive Problems,TRIZ)的功能模型分析和因果链分析、技术冲突矩阵和物理矛盾法等工具应用于钻井船的燃烧臂设计,设计出一种适用于钻井船的基座式回转变幅燃烧臂。