Experimental and Numerical Investigation on Maneuvering Performance of Small Waterplane Area Twin Hull

Dai, Kun; Li, Yunbo

doi:10.21278/brod72206

Cited by 8 publications

(7 citation statements)

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“…For the discretization of governing equations, which are solved in a segregated manner, the Finite Volume Method is utilized [26]. For the discretization of convection terms in RANS equations, a second-order upwind scheme is used, and for the temporal discretization fi rst-order temporal scheme is applied as done in [27].…”

Section: Methods For the Prediction Of Resistance And Effective Power...mentioning

confidence: 99%

Reconstruction of Hull Form of Traditional Croatian Fishing Vessel and Prediction of Eff ective Power

Degiuli¹,

Farkaš²,

Martić³

et al. 2023

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Recently, an increasing attention is given to preservation and popularization of Croatian traditional boat building, which plays an important role in Croatian cultural and national heritage. Reconstruction and revitalization projects of individual historical vessels are key factors within preservation process, where the lack of technical documentation is one of the main issues. In this paper, a simple and efficient procedure for taking offsets of a traditional fishing vessel guc is presented to document and preserve the traditional Croatian vessel form. A 3D model of a guc is generated using the points on the hull surface obtained by the manual measurement and a fairing process. Numerical simulations of the resistance test for a fishing vessel are carried out for a wide range of speeds, and the curve of effective power as a function of vessel speed is provided.

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Section: Methods For the Prediction Of Resistance And Effective Power...mentioning

confidence: 99%

Reconstruction of Hull Form of Traditional Croatian Fishing Vessel and Prediction of Eff ective Power

Degiuli¹,

Farkaš²,

Martić³

et al. 2023

Naše more

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“…The framework of the manoeuvring mathematical model is referred to as the MMG model [30], which is a standard model and still widely used for manoeuvring simulations. (e.g., [31]). In this study, it is developed to be able to deal with cooperative manoeuvres.…”

Section: Motion Equationsmentioning

confidence: 99%

Mathematical model and simulation of cooperative manoeuvres among a ship and tugboats

Sano

2023

Brodogradnja

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Assisting harbour tugboats are essential for safe navigation in ports and for berthing/unberthing operations. Because the port infrastructure needs to be updated in the coming age of autonomous ships, autonomous tugboats or remotely controlled tugboats are expected to be part of the navigation assistance provided by future ports. Although there have been some studies on the design of cooperative control of tugboats, few studies have focused on the mathematical model of their cooperative manoeuvres. Particularly, in the case of pushing assistance, tugboats have often been treated simply as a kind of side thrusters attached to the assisted ship. Thus, we present a new framework of the mathematical model for cooperative manoeuvres that considers the coupled motions among tugboats and a ship as precisely as possible. Solving the dynamics of all tugboats as well as the assisted ship can render the model more advanced and realistic, and is the most significant contribution of this study. The simulation tool based on the proposed model can be used as a plant model in designing and verifying the tugboat’s manoeuvring control system in the future. In this study, as examples, considering a tentative control method, some unique scenarios were simulated to demonstrate the cooperative manoeuvres.

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“…As previously mentioned, typically optimization problem from Eq. ( 7) solved by using metaheuristic optimization algorithm [22] due to the complexity of the MMG model. This optimization algorithm is commonly used to find optimal solutions for complex problems where traditional optimization methods are not effective [23].…”

Section: Problem Formulationmentioning

confidence: 99%

Robust optimal control of a nonlinear surface vessel model with parametric uncertainties

Jambak

Bayezit

2023

Brodogradnja

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This paper presents a fast alternative optimization method for developing a reliable optimal controller that can handle system model parameter uncertainties. The source of uncertainty in this study is identified as hydrodynamic coefficients, which are prone to errors due to the challenges involved in obtaining accurate values. The proposed optimization method utilizes a complex nonlinear ship model provided by Maneuver Modelling Group (MMG) as the reference for the ship motion model. The optimization process is divided into two stages: a blind search followed by bisection optimization, to obtain a robust optimal controller. To demonstrate the effectiveness of the proposed approach, system response analysis and practical tests were performed on Step, M-Turn, and Doublet maneuvers. The results show that the controller parameters obtained from the proposed optimization method are capable of achieving high success rates in controlling a system with uncertain parameters.

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Experimental and Numerical Investigation on Maneuvering Performance of Small Waterplane Area Twin Hull

Cited by 8 publications

References 0 publications

Reconstruction of Hull Form of Traditional Croatian Fishing Vessel and Prediction of Eff ective Power

Reconstruction of Hull Form of Traditional Croatian Fishing Vessel and Prediction of Eff ective Power

Mathematical model and simulation of cooperative manoeuvres among a ship and tugboats

Robust optimal control of a nonlinear surface vessel model with parametric uncertainties

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