The technology and methods involved in pipeline laying in shallow water have evolved to the level of routine and commonplace. However, regarding the unexpected deepwater complexity, the traditional pipeline laying tec...The technology and methods involved in pipeline laying in shallow water have evolved to the level of routine and commonplace. However, regarding the unexpected deepwater complexity, the traditional pipeline laying techniques have to confront many new challenges arisen from the increase of the water depth, diameter of the pipe and the welding difficuhy, all of which should be modified and/or innovated based on the existed mature experiences. The purpose of this investigation is to outline the existing and new engineering laying techniques and the associated facilities, which can provide some significant information to the related research. In the context, the latest deepwater pipeline laying technology and pipe laying barges of the renowned companies from Switzerland, Norway, Italy etc., are introduced and the corresponding comparison and discussion are presented as well.展开更多
以3000 m J-Lay型深水铺管船作业为研究对象,建立全耦合数值分析模型。通过准静态分析研究立管敏感性参数变化规律,确定铺管作业时最优立管顶端倾角。考虑剖面流、风和波浪综合作用,对不同工况下铺管作业过程进行数值模拟,对铺管作业过...以3000 m J-Lay型深水铺管船作业为研究对象,建立全耦合数值分析模型。通过准静态分析研究立管敏感性参数变化规律,确定铺管作业时最优立管顶端倾角。考虑剖面流、风和波浪综合作用,对不同工况下铺管作业过程进行数值模拟,对铺管作业过程中立管受力特征、顶端固定点运动状态进行预报和研究。研究表明,立管顶端倾斜角度改变对立管最大弯矩有显著影响,顶端倾角范围宜在80°~85°。在风浪流综合作用下,由于横摇与纵摇运动的耦合作用,横浪和尾斜浪向立管顶端最大弯矩显著增大,在作业过程中应引起关注。展开更多
基金the National High Technology Research and Development Program of China (863 Program,Grant No.2006AA09A105)
文摘The technology and methods involved in pipeline laying in shallow water have evolved to the level of routine and commonplace. However, regarding the unexpected deepwater complexity, the traditional pipeline laying techniques have to confront many new challenges arisen from the increase of the water depth, diameter of the pipe and the welding difficuhy, all of which should be modified and/or innovated based on the existed mature experiences. The purpose of this investigation is to outline the existing and new engineering laying techniques and the associated facilities, which can provide some significant information to the related research. In the context, the latest deepwater pipeline laying technology and pipe laying barges of the renowned companies from Switzerland, Norway, Italy etc., are introduced and the corresponding comparison and discussion are presented as well.
文摘以3000 m J-Lay型深水铺管船作业为研究对象,建立全耦合数值分析模型。通过准静态分析研究立管敏感性参数变化规律,确定铺管作业时最优立管顶端倾角。考虑剖面流、风和波浪综合作用,对不同工况下铺管作业过程进行数值模拟,对铺管作业过程中立管受力特征、顶端固定点运动状态进行预报和研究。研究表明,立管顶端倾斜角度改变对立管最大弯矩有显著影响,顶端倾角范围宜在80°~85°。在风浪流综合作用下,由于横摇与纵摇运动的耦合作用,横浪和尾斜浪向立管顶端最大弯矩显著增大,在作业过程中应引起关注。
