Optimal Stiffness for Flexible Connectors on A Mobile Offshore Base at Rough Sea States

作     者：WU Lin-jian WANG Yuan-zhan WANG Yu-chi CHEN Jia-yu LI Yi LI Qing-mei XIE Tao 

作者机构：State Key Laboratory of Hydraulic Engineering Simulation and SafetyCollaborative Innovation Center for Advanced Ship and Deep-Sea ExplorationTianjin UniversityTianjin 300072China School of Civil EngineeringTianjin UniversityTianjin 300072China College of EngineeringOcean University of ChinaQingdao 266100China Chongqing Shipping Engineering Survey and Design Institute of the Yangtze RiverChongqing 401147China School of River&Ocean EngineeringChongqing Jiaotong UniversityChongqing 400074China 

出 版 物：《China Ocean Engineering》 (中国海洋工程（英文版）)

年 卷 期：2018年第32卷第6期

页      面：683-695页

核心收录：

学科分类：07[理学] 

基　　金：financially supported by the National Key Research and Development Program of China(Grant Nos.2016YFC0802204and 2016YFC0802201) the National Natural Science Foundation of China(Grant No.51679166) the National Natural Science Fund for Innovative Research Groups Science Foundation(Grant No.51321065) the Construction Science and Technology Project of the Ministry of Transport of the People’s Republic of China(Grant No.2014328224040) the Innovative Research Program for Graduate Students at Chongqing Jiaotong University(Grant No.20140104) 

主　　题：mobile offshore base(MOB) flexible connectors the optimal stiffness rough sea states 

摘      要：This paper investigates a simplified method to determine the optimal stiffness of flexible connectors on a mobile offshore base(MOB) during the preliminary design stage. A three-module numerical model of an MOB was used as a case study. Numerous constraint forces and relative displacements for the connectors at rough sea states with different wave angles were utilized to determine the optimized stiffness of the flexible connectors. The range of optimal stiffnesses for the connectors was obtained based on the combination and intersection of the optimized stiffness results, and the implementation steps were elaborated in detail. The percentage reductions of the optimized and optimal stiffness of the flexible connector were determined to quantitatively evaluate the decreases of the constraint force and relative displacement of the connectors compared with those calculated by using the original range of the connector stiffnesses. The results indicate the accuracy and feasibility of this method for determining the optimal stiffness of the flexible connectors and demonstrate the rationality and practicability of the optimal stiffness results. The research ideas, calculation process, and solutions for the optimal stiffness of the flexible connectors of an MOB in this paper can provide valuable technical support for the design of the connectors in similar semisubmersible floating structures.