Results 21 to 30 of about 1,052 (146)

Variable-Length Cable Dynamics of Payout and Reel-in With a Vertically Tethered Underwater Drill Rig

IEEE Access, 2020
A new dynamic model of the variable-length cable used in a vertically tethered underwater drill rig is presented in this paper, which also includes the dynamics of its fixed-length counterpart.
Weicai Quan, Qingqing Chang
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Simulation Analysis of Passive Heave Compensation Device for Heavy-duty Underwater Robot

Kongzhi Yu Xinxi Jishu, 2023
At present, the simulation model of heave compensation device is usually highly complex, which is not conductive for intuitive understanding of its dynamic characteristics and performance mechanism.
ZHU Yinggu, ZHANG Dinghua, TU Shaoping, ZHANG Chunlin, XIANG Liyang   +4 more
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Influence of Bending Stiffness on Snap Loads in Marine Cables: A Study Using a High-Order Discontinuous Galerkin Method

Journal of Marine Science and Engineering, 2020
Marine cables are primarily designed to support axial loads. The effect of bending stiffness on the cable response is therefore often neglected in numerical analysis.
Johannes Palm, Claes Eskilsson
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Disturbance Observer-Based Double-Loop Sliding-Mode Control for Trajectory Tracking of Work-Class ROVs

Journal of Marine Science and Engineering, 2022
The open-frame structure of work-class ROVs results in significant model uncertainties, and its motion is strongly disturbed by the umbilical cable. To address these problems, this article developed a nonlinear disturbance observer-based super-twisting ...
Bolun Huang, Qi Yang
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A Nonlinear Observer for Remotely Operated Vehicles with Cable Effect in Ocean Currents

Applied Sciences, 2018
A nonlinear observer for a remotely operated vehicle (ROV) is investigated, and a four-degree-of-freedom nonlinear sliding state observer is designed in this study.
Xiang Li, Min Zhao, Tong Ge
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Numerical and Experimental Analysis of Umbilical Cables under Tension [PDF]

Advanced Composites Letters, 2017
Umbilical cables are composite structures that consisting of metallic material and polymeric material. Analysing tension behaviour under axial loading is a key requirement to design the structure. A full three-dimensional finite element model is established in which the effect of radial deformation is given more attention.
Qingzhen Lu, Jinlong Chen, zhixun Yang, Yin Yuan chao, Qianjin Yue   +4 more
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Fatigue Analysis of Inter-Array Power Cables between Two Floating Offshore Wind Turbines Including a Simplified Method to Estimate Stress Factors

Journal of Marine Science and Engineering, 2023
The use of floating offshore wind farms for electrical energy supply is expected to rise significantly over the coming years. Suspended inter-array power cables are a new design to connect floating offshore wind turbines (FOWTs) with shorter cable ...
Dennis Beier, Anja Schnepf, Sean Van Steel, Naiquan Ye, Muk Chen Ong   +4 more
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Development and Application of Base Plate Reclamation System in Marine Survey Ship

Shiyou jixie, 2021
The base plate reclamation system is a key component of drilling system in the survey ship, which is mainly used for drill string positioning, base plate reclamation and wellhead sampling monitoring.
Fan Song, Li Peng, Li Chaojun, Bai Lanchang, Fu Jun, Liu Jiaoli, Li Huan   +6 more
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Design and Simulation Analysis of Lower Limit Follow-up Mechanism of Submerged Glider Based on the Parallel Four-bar Linkage

Jixie chuandong, 2023
The wave glider is a new type of unmanned observation platform on water surface, which can generate forward thrust by obtaining wave energy through the swing of submerged glider's hydrofoils.
Liu Fen, Zhang Jin, Sang Hongqiang, Sun Xiujun, Yang Shiming   +4 more
doaj  

Real-Time Prediction of the Dynamic Spatial Configuration of Umbilical Cables Based on Monitoring Data During Deep-Sea In-Situ Mining

Journal of Marine Science and Engineering
Prediction of the spatial configuration of the umbilical cable during deep-sea mining in-situ tests is of great significance because dynamic change may cause the umbilical cable to touch the ground or overturn the mining vehicle.
Chaojun Huang, Shuqing Wang, Jiancheng Liu, Lei Li, Wencheng Liu, Lin Huang, Zhihao Yu, Wen Shen, Yuankun Sun, Yu Liu, Yuanyuan Liu   +10 more
doaj   +1 more source