Mathematical Modeling Of Inland Vessel Maneuverability Considering Rudder Hydrodynamics

Author : Jialun Liu
Publisher : Springer Nature
ISBN 13 : 3030474755
Total Pages : 252 pages
Book Rating : 4.51/5 ( download)

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Download or read book Mathematical Modeling of Inland Vessel Maneuverability Considering Rudder Hydrodynamics written by Jialun Liu and published by Springer Nature. This book was released on 2020-05-11 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book demonstrates that different rudder configurations have different hydrodynamic characteristics, which are influenced by the profile, the parameters, and the specific configuration. The author proposes new regression formulas to help naval architects quickly estimate the rudder-induced forces and moments in maneuvering. Furthermore, the author proposes and validates an integrated maneuvering model for both seagoing ships and inland vessels. Using the proposed regression formulas and maneuvering model, the specific impacts of rudder configurations on inland vessel maneuverability are studied. In turn, the book demonstrates the application of Reynolds-Averaged Navier–Stokes (RANS) simulations to obtain rudder hydrodynamic characteristics, and the integration of the RANS results into maneuvering models as an accurate estimation of rudder forces and moments needed to quantify the impacts of rudder configurations on ships’ maneuvering performance. In addition, the author proposes new criteria for the prediction and evaluation of inland vessel maneuverability. Simulations of ships with various rudder configurations are presented, in order to analyze the impacts of rudder configurations on ship maneuverability in different classic and proposed test maneuvers. Offering essential guidance on the effects of rudders for inland vessel maneuverability, and helping practical engineers make informed design choices, the book is of interest to researchers and academics in the field of naval engineering, as well as students of naval architecture. Industrial practitioners working on ship design may also find it beneficial.

Author : Peng Du
Publisher :
ISBN 13 : 9781685072780
Total Pages : pages
Book Rating : 4.8X/5 ( download)

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Download or read book Numerical Modeling, Prediction of Ship Maneuvering and Hydrodynamics During Inland Waterway Transport written by Peng Du and published by . This book was released on 2022-01-20 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In this work, ship hydrodynamics during inland waterway transport and ship maneuvering are investigated using CFD (Computational Fluid Dynamics) based on OpenFoam. Validation and verification studies are carried out for the mesh convergence, time step convergence, sensitivity to turbulence models and dynamic mesh techniques. A quaternion-based 6DoF motion solver is implemented for the trim and sinkage predictions. Environmental effects on several inland vessels (convoy 1, convoy 2, tanker) are studied using the validated numerical models. Three important aspects, the confinement effect of the waterway, head-on encounter, and ship-bridge pile interaction are simulated. The testing conditions cover a wide range, including various channel dimensions, water depths, ship draughts and speeds. The ship resistance, wave pattern, Kelvin angle and wave elevation at specific positions are investigated as functions of these parameters. Ship maneuvering is investigated using virtual captive model tests based on the MMG (Mathematical Maneuvering Group) model. An actuator disk is implemented to replace the real propeller. Open water test, rudder force test, OTT (Oblique Towing Tank test) and CMT (Circular Motion Test) of a KVLCC2 model are carried out to obtain the hydrodynamic coefficients of the propeller, rudder and ship hull. Using the obtained coefficients, system-based maneuvering simulations are carried out and validated using the free running test data. These studies reproduce real ship tests and thus prove the validity of our numerical models. As a result, the numerical solver is promising in ship hydrodynamics and marine engineering simulations.

Author : Michelle K. Betancourt
Publisher :
ISBN 13 : 9781423501442
Total Pages : 71 pages
Book Rating : 4.46/5 ( download)

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Download or read book A Comparison of Ship Maneuvering Characteristics for Rudders and Podded Propulsors written by Michelle K. Betancourt and published by . This book was released on 2003 with total page 71 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comparison of a high speed container ship using a rudder versus a podded propulsor is made to study replacing a rudder with a pod. A mathematical model is altered to simulate a ship operating with a rudder and with a pod to maneuver. The model incorporates the nonlinear maneuvering equations and couples the surge and sway forces, yaw and roll moment, and the roll angle induced during a steady turn with varying rudder and pod angles. The model uses the hydrodynamic derivatives and coefficients for a high speed container ship. The equations are numerically integrated in order to predict the roll angle, sway and surge velocities, and the ship's position in the xy-plane. Both transient and steady state results are utilized to quantify the relative efficiency of each system. The results are used as a preliminary study into replacing a rudder on a ship with a podded propulsor. The results indicate that the ship responds faster and has a shorter turning radius with the pod at lower initial speeds and pod angles, while the rudder responds better at high speeds regardless of angle. Further research is necessary to study the effects of changing the pod's position and increasing the number of pods used.

Author : Volker Bertram
Publisher : Elsevier
ISBN 13 : 0080971504
Total Pages : 392 pages
Book Rating : 4.06/5 ( download)

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Download or read book Practical Ship Hydrodynamics written by Volker Bertram and published by Elsevier. This book was released on 2012 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: Practical Ship Hydrodynamics provides a comprehensive overview of hydrodynamic experimental and numerical methods for ship resistance and propulsion, maneuvering, seakeeping and vibration. Beginning with an overview of problems and approaches, including the basics of modeling and full scale testing, expert author Volker Bertram introduces the marine applications of computational fluid dynamics and boundary element methods. Expanded and updated, this new edition includes: Otherwise disparate information on the factors affecting ship hydrodynamics, combined to provide one practical, go-to resource. Full coverage of new developments in computational methods and model testing techniques relating to marine design and development. New chapters on hydrodynamic aspects of ship vibrations and hydrodynamic options for fuel efficiency, and increased coverage of simple design estimates of hydrodynamic quantities such as resistance and wake fraction. With a strong focus on essential background for real-life modeling, this book is an ideal reference for practicing naval architects and graduate students.

Author : Soroosh Mohammadafzali
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.12/5 ( download)

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Download or read book A Mathematical Model for the Maneuvering Simulation of a Propelled SPAR Vessel written by Soroosh Mohammadafzali and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: To predict the maneuvering performance of a propelled SPAR vessel, a mathematical model was established as a path simulator. A system-based mathematical model was chosen as it offers advantages in cost and time over full Computational Fluid Dynamics (CFD) simulations. The model is intended to provide a means of optimizing the maneuvering performance of this new vessel type. In this study the hydrodynamic forces and control forces are investigated as individual components, combined in a vectorial setting, and transferred to a body-fixed basis. SPAR vessels are known to be very sensitive to large amplitude motions during maneuvers due to the relatively small hydrostatic restoring forces. Previous model tests of SPAR vessels have shown significant roll and pitch amplitudes, especially during course change maneuvers. Thus, a full 6 DOF equation of motion was employed in the current numerical model. The mathematical model employed in this study was a combination of the model introduced by the Maneuvering Modeling Group (MMG) and the Abkowitz (1964) model. The new model represents the forces applied to the ship hull, the propeller forces and the rudder forces independently, as proposed by the MMG, but uses a 6DOF equation of motion introduced by Abkowitz to describe the motion of a maneuvering ship. The mathematical model was used to simulate the trajectory and motions of the propelled SPAR vessel in 10 ̊/10 ̊, 20 ̊/20 ̊ and 30 ̊/30 ̊ standard zig-zag maneuvers, as well as turning circle tests at rudder angles of 20 ̊ and 30 ̊. The simulation results were used to determine the maneuverability parameters (e.g. advance, transfer and tactical diameter) of the vessel. The final model provides the means of predicting and assessing the performance of the vessel type and can be easily adapted to specific vessel configurations based on the generic SPAR-type vessel used in this study.

Author : R. P. Gokarn
Publisher : Springer
ISBN 13 : 9789819706242
Total Pages : 0 pages
Book Rating : 4.46/5 ( download)

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Download or read book A Study of Ship Manoeuvrability written by R. P. Gokarn and published by Springer. This book was released on 2024-04-22 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents various aspects of Ship Manoeuvrability in a form that can be understood without undue effort. Beginning with the equations of motion, the book describes the main manoeuvring mathematical models with their application in the numerical simulation of various manoeuvres. The other topics covered in the book range from manoeuvring model tests and full-scale trials through rudder hydrodynamics and design to manoeuvring standards and guidelines. This book also discusses ship autopilots and dynamic positioning. Finally, it provides a description of unconventional rudders and propulsion devices used for manoeuvring. The book has more than 180 figures to explain various concepts and 40 exercises with partial solutions to confirm that the reader has understood the subject. The book also includes recent developments in the subject and can be a valuable reference for beginners, researchers, and professionals interested in the field.

Author :
Publisher :
ISBN 13 :
Total Pages : 256 pages
Book Rating : 4.77/5 ( download)

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Download or read book Government Reports Announcements written by and published by . This book was released on 1973-04-25 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Author : Lothar Birk
Publisher : John Wiley & Sons
ISBN 13 : 1118855515
Total Pages : 885 pages
Book Rating : 4.15/5 ( download)

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Download or read book Fundamentals of Ship Hydrodynamics written by Lothar Birk and published by John Wiley & Sons. This book was released on 2019-04-25 with total page 885 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fundamentals of Ship Hydrodynamics: Fluid Mechanics, Ship Resistance and Propulsion Lothar Birk, University of New Orleans, USA Bridging the information gap between fluid mechanics and ship hydrodynamics Fundamentals of Ship Hydrodynamics is designed as a textbook for undergraduate education in ship resistance and propulsion. The book provides connections between basic training in calculus and fluid mechanics and the application of hydrodynamics in daily ship design practice. Based on a foundation in fluid mechanics, the origin, use, and limitations of experimental and computational procedures for resistance and propulsion estimates are explained. The book is subdivided into sixty chapters, providing background material for individual lectures. The unabridged treatment of equations and the extensive use of figures and examples enable students to study details at their own pace. Key features: • Covers the range from basic fluid mechanics to applied ship hydrodynamics. • Subdivided into 60 succinct chapters. • In-depth coverage of material enables self-study. • Around 250 figures and tables. Fundamentals of Ship Hydrodynamics is essential reading for students and staff of naval architecture, ocean engineering, and applied physics. The book is also useful for practicing naval architects and engineers who wish to brush up on the basics, prepare for a licensing exam, or expand their knowledge.

Author :
Publisher :
ISBN 13 :
Total Pages : 1420 pages
Book Rating : 4.54/5 ( download)

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Download or read book Government Reports Announcements & Index written by and published by . This book was released on 1977-03 with total page 1420 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Author : John Holmes
Publisher : Springer Nature
ISBN 13 : 3031017080
Total Pages : 67 pages
Book Rating : 4.87/5 ( download)

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Download or read book Reduction of a Ship's Magnetic Field Signatures written by John Holmes and published by Springer Nature. This book was released on 2022-06-01 with total page 67 pages. Available in PDF, EPUB and Kindle. Book excerpt: Decreasing the magnetic field signature of a naval vessel will reduce its susceptibility to detonating naval influence mines and the probability of a submarine being detected by underwater barriers and maritime patrol aircraft. Both passive and active techniques for reducing the magnetic signatures produced by a vessel's ferromagnetism, roll-induced eddy currents, corrosion-related sources, and stray fields are presented. Mathematical models of simple hull shapes are used to predict the levels of signature reduction that might be achieved through the use of alternate construction materials. Also, the process of demagnetizing a steel-hulled ship is presented, along with the operation of shaft-grounding systems, paints, and alternate configurations for power distribution cables. In addition, active signature reduction technologies are described, such as degaussing and deamping, which attempt to cancel the fields surrounding a surface ship or submarine rather than eliminate its source. Table of Contents: Introduction / Passive Magnetic Silencing Techniques / Active Signature Compensation / Summary