Maximum Force of Inclined Pullout of A Torpedo Anchor in Cohesive Beds  

作　　者：WANG Cheng CHEN Xiao-hui YU Guo-liang 

机构地区：[1]SKLOE, CISSE, School of Naval Architecture, Ocean 7338 [2]Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China

出　　处：《China Ocean Engineering》2019年第3期333-343,共11页中国海洋工程（英文版）

基　　金：financially supported by the Ministry of Education of China(Grant No.6141A02022337)

摘　　要：Torpedo anchors have been used in mooring systems for deep-water oil and gas projects owing to their prominent advantages, such as low cost and easy installation. The maximum force of torpedo anchors is crucial not only to the safety and stability of vessels and other marine facilities, but also for an economical design. It is necessary to develop reliable formula for fast predicting their maximum inclined force of a torpedo anchor in cohesive beds. In this study, the maximum inclined force of a torpedo anchor vertically embedded in cohesive beds was extensively investigated. 316 sets of inclined pullout laboratory tests were carried out for 9 differently shaped torpedo anchors which were vertically embedded in different cohesive beds. The loading curves were automatically acquisitioned and their characteristics were analyzed. The load angle relative to the horizontal varied from 20° to 90°. A new formula for fast calculating the maximum inclined force of the torpedo anchor vertically embedded in cohesive beds was obtained based on force analysis and a nonlinear regression on the data from the present and other studies. Effect aspects on the tests are discussed and further studies are highlighted.Torpedo anchors have been used in mooring systems for deep-water oil and gas projects owing to their prominent advantages, such as low cost and easy installation. The maximum force of torpedo anchors is crucial not only to the safety and stability of vessels and other marine facilities, but also for an economical design. It is necessary to develop reliable formula for fast predicting their maximum inclined force of a torpedo anchor in cohesive beds. In this study,the maximum inclined force of a torpedo anchor vertically embedded in cohesive beds was extensively investigated.316 sets of inclined pullout laboratory tests were carried out for 9 differently shaped torpedo anchors which were vertically embedded in different cohesive beds. The loading curves were automatically acquisitioned and their characteristics were analyzed. The load angle relative to the horizontal varied from 20° to 90°. A new formula for fast calculating the maximum inclined force of the torpedo anchor vertically embedded in cohesive beds was obtained based on force analysis and a nonlinear regression on the data from the present and other studies. Effect aspects on the tests are discussed and further studies are highlighted.

关 键 词：TORPEDO ANCHOR MAXIMUM inclined FORCE COHESIVE bed load angle EMBEDMENT depth 

分 类 号：P[天文地球]