2022年北溪天然气管道泄漏事件引起了全世界的广泛关注。建立了北溪天然气管道的有限元分析(finite element analysis,简称FEA)模型,使用LS-DYNA求解器和ALE(arbitrary Lagrangian-Eulerian)算法模拟了水下爆炸及管道破坏的全过程,并通...2022年北溪天然气管道泄漏事件引起了全世界的广泛关注。建立了北溪天然气管道的有限元分析(finite element analysis,简称FEA)模型,使用LS-DYNA求解器和ALE(arbitrary Lagrangian-Eulerian)算法模拟了水下爆炸及管道破坏的全过程,并通过了模型验证。参考北溪管道事件中泄漏点的实地拍摄照片,通过有限元分析实现了事故反演,并从中分析推断得出造成北溪一号和北溪二号管道泄漏的可能原因。研究明晰了内部承压海底管道在水下爆炸作用下毁伤的3个阶段:爆炸冲击阶段、内压泄漏阶段和稳定阶段。引入中空夹层复合海底管道结构形式,并对其进行了水下爆炸的有限元分析。分析结果显示,新型结构相比于常用的单层管道形式,可显著提升其抗爆和可修复性能,为相关海底管道抗爆设计提供优选结构形式。展开更多
Rising demand for minerals and metals in high-tech and new energy industries has led to a great interest in exploration of seabed mineral resources.Such resources,including polymetallic nodule(PMN),polymetallic sulphi...Rising demand for minerals and metals in high-tech and new energy industries has led to a great interest in exploration of seabed mineral resources.Such resources,including polymetallic nodule(PMN),polymetallic sulphide(PMS),and cobalt-rich ferromanganese crust(CFC),are considered as an alternative source of metals to terrestrial deposits.Although a considerable number of sea trials of deep-sea mining have been carried out,the deep-sea mining does not achieve the commercial exploitation due to the complexity of deep-sea mining system and deep-sea mining environment.In fact,to achieve commercial deep-sea mining,the technology and equipment of deep-sea mining are the key points.Therefore,the present study presents the development of the technology and equipment of deep-sea mining.It commences with a requirement of technology and equipment for deep-sea mining,including environmental impact,reliability,energy cost,efficiency,etc.Then,a historical perspective and present-day effort related to deep-sea mining vehicles are given,which highlights the evolution of collection mechanism and walking mode of deep-sea mining vehicle.Subsequently,the present study discusses the operation of subsea lifting system and surface support system,shedding light on the crucial equipment and processes.The challenges and prospects in the deep-sea mining are presented in final,including environmental protection,self-propelled crawler,hydraulic pipeline lifting,and intelligent equipment,etc.展开更多
文摘2022年北溪天然气管道泄漏事件引起了全世界的广泛关注。建立了北溪天然气管道的有限元分析(finite element analysis,简称FEA)模型,使用LS-DYNA求解器和ALE(arbitrary Lagrangian-Eulerian)算法模拟了水下爆炸及管道破坏的全过程,并通过了模型验证。参考北溪管道事件中泄漏点的实地拍摄照片,通过有限元分析实现了事故反演,并从中分析推断得出造成北溪一号和北溪二号管道泄漏的可能原因。研究明晰了内部承压海底管道在水下爆炸作用下毁伤的3个阶段:爆炸冲击阶段、内压泄漏阶段和稳定阶段。引入中空夹层复合海底管道结构形式,并对其进行了水下爆炸的有限元分析。分析结果显示,新型结构相比于常用的单层管道形式,可显著提升其抗爆和可修复性能,为相关海底管道抗爆设计提供优选结构形式。
基金the National Science Fund for Distinguished Young Scholars(Grant No.52225107)National Key Research and Development Program of China(Grant No.2021YFC2801503)for funding provided to this work.
文摘Rising demand for minerals and metals in high-tech and new energy industries has led to a great interest in exploration of seabed mineral resources.Such resources,including polymetallic nodule(PMN),polymetallic sulphide(PMS),and cobalt-rich ferromanganese crust(CFC),are considered as an alternative source of metals to terrestrial deposits.Although a considerable number of sea trials of deep-sea mining have been carried out,the deep-sea mining does not achieve the commercial exploitation due to the complexity of deep-sea mining system and deep-sea mining environment.In fact,to achieve commercial deep-sea mining,the technology and equipment of deep-sea mining are the key points.Therefore,the present study presents the development of the technology and equipment of deep-sea mining.It commences with a requirement of technology and equipment for deep-sea mining,including environmental impact,reliability,energy cost,efficiency,etc.Then,a historical perspective and present-day effort related to deep-sea mining vehicles are given,which highlights the evolution of collection mechanism and walking mode of deep-sea mining vehicle.Subsequently,the present study discusses the operation of subsea lifting system and surface support system,shedding light on the crucial equipment and processes.The challenges and prospects in the deep-sea mining are presented in final,including environmental protection,self-propelled crawler,hydraulic pipeline lifting,and intelligent equipment,etc.
