Transient Dynamic Analysis of A Variable-Length Rope-Driven Wave Energy System  

作　　者：QUAN Wei-cai OU Ding-chao XU Jing-wei HUO Liang-qing XI Yi 

机构地区：[1]National-local Joint Engineering Laboratory for Marine Mineral Resources Exploration Equipment and Safety Technology,Hunan University of Science and Technology,Xiangtan 411201,China [2]State key Laboratory of Robotics,Shenyang Institute of Automation,Chinese Academy of Sciences,Shenyang 110169,China

出　　处：《China Ocean Engineering》2022年第3期474-487,共14页中国海洋工程（英文版）

基　　金：This work was funded by the National Natural Science Foundation of China(Grant No.51709102);the Natural Science Foundation of Hunan Province(Grant No.2019JJ50166);the Scientific Research Fund of Hunan Provincial Education Department(Grant No.19B184).

摘　　要：A new dynamic model of a variable-length rope,which could be used for the transient analysis of a buoy-rope-generator(BRG)wave energy system,was proposed in this paper.The model started from the basic dynamic equations of variable mass system,and took into account the physical properties such as axial force,shear and bending.According to the principle of D'Alembert-Lagrange,the equivalent integral weak formulation was firstly obtained,and through consistent linearization and isoparametric discretization,the finite element model of the variable-length rope was then derived.The Bathe scheme was employed to solve the model numerically,based on its excellent performance in solving nonlinear dynamic problems,and an automatic time step size algorithm was designed according to the number of iterations of the two substeps of Bathe scheme.The procedures of rope mesh regeneration were also put forward,where only one variable-length element was always located at the top end of the rope,and the rest were all fixed-length elements.The proposed variable-length rope model and solution schemes were verified through comparison with the results of a tank experiment.Finally,the transient dynamics of a kind of BRG system was analyzed and discussed.

关 键 词：cable dynamics variable-length buoy-rope-generator numerical analysis 

分 类 号：P743.2[天文地球—海洋科学] TM612[电气工程—电力系统及自动化]