Cable Selection Considerations for Subsea Vehicles

Fard, Razieh Nejati; Eidsvik, Ole-Alexander; Tedeschi, Elisabetta; Scholberg, Ingrid

doi:10.1109/oceanskobe.2018.8559225

Cited by 4 publications

(4 citation statements)

References 13 publications

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“…In [34], tether cable selection from electrical and mechanical perspectives is discussed. For the design of tether cable, primary inputs such as the vehicle missions, number of major loads and maximum power demand are considered.…”

Section: Modeling Of the Tether Cable Systemmentioning

confidence: 99%

Analytical and Numerical Study of Underwater Tether Cable Dynamics for Seabed Walking Robots Using Quasi-Static Approximation

Khan,

Wang,

et al. 2023

JMSE

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In this study, the dynamics of tether cables (TCs) that connect a surface ship and a walking robotic vehicle on the seabed are numerically investigated. The main aim of this study is to develop a reliable prediction model for the dynamic behavior of TCs attached to a seabed walking robot. This system consists of a surface ship, underwater manned seabed walking robot (UMSWR), TC, and winch. The study is comprised of mathematical modeling and numerical simulations of the developed governing equations for the TC dynamics. A relatively simple and efficient mathematical analysis method is proposed to determine the configuration and forces on the TC under a steady state. The problem is solved using the quasi-static technique and lumped mass parameters for discretizing and modeling the dynamics of the TC. Based on the static analysis of the Morrison equation and finite segment method, analytical formulas of the steady-state equation of TC were obtained and solved. The effects of variable water density and variable underwater currents are included in the cable behavior. Consequently, the two-dimensional TC profile and axial tension were estimated in a steady-state configuration. The developed equations were simulated in MATLAB software. Several numerical simulation examples were worked out, demonstrating the accurate performance of the method. Various input parameters of the system and their relationships with the output values were investigated, thereby demonstrating the versatility of the method.

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Section: Modeling Of the Tether Cable Systemmentioning

confidence: 99%

Analytical and Numerical Study of Underwater Tether Cable Dynamics for Seabed Walking Robots Using Quasi-Static Approximation

Khan,

Wang,

et al. 2023

JMSE

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“…The area surrounded by each alternative will be associated to the design grade that implies its suitability qualitatively. The authors have applied this method to the umbilical selection procedure for subsea vehicles in [23]. Hence, it is not going to be repeated here.…”

Section: Power Distribution Design Frameworkmentioning

confidence: 99%

“…top tension due to weight increase) and horizontal (i.e. drag forces due to diameter increase) forces acting on the cable [23]. Therefore, the cable diameter and weight should be optimized.…”

Section: B Topside and Subsea Considerationsmentioning

confidence: 99%

Power System Design Considerations for a Seafloor Mining Vehicle

Fard

Tedeschi

2018

2018 IEEE Energy Conversion Congress and Exposition (ECCE)

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The main goal of this paper is to give a framework for designing the power distribution system for seafloor mining vehicles operating in deep and ultra-deep waters. As the starting point prior to the design, the tethered seafloor mining vehicles are compared with their counterparts in the terrestrial mines and the well-developed remotely operated vehicles. Then, various power distribution alternatives are studied and compared taking into account the main design criteria such as efficiency and size of components. Although the major loads of these vehicles are AC motor loads for drilling, pumping and locomotion, it is concluded that the DC distribution, both in topside and subsea sections, is the best option. Typical values for efficiency and volume grades (normalized values) for the major components in the distribution system have been considered in the calculations.

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“…While the TMS helps in reducing the weight and drag of the umbilical, it introduces additional connections and components, which can increase the system's susceptibility to failures. Each connection point becomes a potential point of failure, and any malfunction or disconnection can disrupt the power, communication, or control signals between the ROV and the surface vessel (FARD et al, 2018). Therefore, it is crucial to design and engineer the TMS with reliability and robustness in mind, incorporating redundancy and fail-safe mechanisms to minimize the risk of failures (RESTIVO; GLENN; WILLIAMS, 2017).…”

Section: Umbilical and Tether Management Systemmentioning

confidence: 99%

Estudo e análise de inspeções por veículos operados remotamente nas estruturas offshore de óleo e gás.

Dalhatu

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Cable Selection Considerations for Subsea Vehicles

Cited by 4 publications

References 13 publications

Analytical and Numerical Study of Underwater Tether Cable Dynamics for Seabed Walking Robots Using Quasi-Static Approximation

Analytical and Numerical Study of Underwater Tether Cable Dynamics for Seabed Walking Robots Using Quasi-Static Approximation

Power System Design Considerations for a Seafloor Mining Vehicle

Estudo e análise de inspeções por veículos operados remotamente nas estruturas offshore de óleo e gás.

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