Dynamics of risers for earthquake resistant designs  

作　　者：Duan Menglan Wang Yi Yue Zhiyong Estefen Segen Yang Xiaogang 

机构地区：[1]School of Naval Architecture and Marine Engineering, Dalian University of Technology, Dalian, Liaoning 116024, China [2]Offshore Oil/Gas Research Center, China University of Petroleum, Beijing 102249, China [3]Department of Mechanics and Engineering, Peking University, Beijing 100080, China [4]COPPE, Federal University of Rio de Janeiro, EO.Box 68508 RJ 21945-970, Brazil [5]Design Division, CNOOC Engineering, Tanggu, Tianjin 300452, China

出　　处：《Petroleum Science》2010年第2期273-282,共10页石油科学（英文版）

基　　金：supported by the National Natural Science Foundation of China (granted number 50979113);funded by the National 863 Program of China (granted number 2006AA09A105)

摘　　要：It is well known that no criterion about seismic design for risers is available, and relevant research has not been reported. A comprehensive study of riser dynamics during earthquakes is performed in this paper. A dynamic model for seismic analysis of risers is developed in accordance with the working environment of the risers and the influence of inertia force of the pipelines. The dynamic equations for the developed model are derived and resolved on the basis of the energy theory of beams. Numerical simulation for an engineering project in the Bohai Oil Field, China shows that the fundamental frequency of the riser plays the major role in the seismic responses, and for platforms in shallow water in Bohai Bay, the risers demonstrate a much lower stress response due to prominent differences between the riser frequency and the earthquake wave frequency. The presented model and its corresponding method for seismic analysis are practical and important for riser design resistant to earthquake waves.It is well known that no criterion about seismic design for risers is available, and relevant research has not been reported. A comprehensive study of riser dynamics during earthquakes is performed in this paper. A dynamic model for seismic analysis of risers is developed in accordance with the working environment of the risers and the influence of inertia force of the pipelines. The dynamic equations for the developed model are derived and resolved on the basis of the energy theory of beams. Numerical simulation for an engineering project in the Bohai Oil Field, China shows that the fundamental frequency of the riser plays the major role in the seismic responses, and for platforms in shallow water in Bohai Bay, the risers demonstrate a much lower stress response due to prominent differences between the riser frequency and the earthquake wave frequency. The presented model and its corresponding method for seismic analysis are practical and important for riser design resistant to earthquake waves.

关 键 词：Subsea pipeline RISER seismic design dynamic response earthquake wave Hamilton theory 

分 类 号：P315.5[天文地球—地震学] TU352.11[天文地球—固体地球物理学]