Hybrid Ship Hulls Engineering Design Rationales

Hybrid Ship Hulls provides an overview of cutting-edge developments in hybrid composite-metal marine ship hulls, covering the critical differences in material processing and structural behavior that must be taken into account to maximise benefits and performance.Supporting the design of effective hybrid hulls through proper consideration of the benefits and challenges inherent to heterogenic structures, the book covers specific details of quality control, manufacturing, mechanical and thermal stress, and other behavioral aspects that need to be treated differently when engineering hybrid ship hulls. With a particular focus on heavy-duty naval applications, the book includes guidance on the selection of composite part configurations, innovative design solutions, novel hybrid joining techniques, and serviceability characterization. Addresses the engineering requirements specific to hybrid structure engineering that are essential for optimization of hybrid hull design and maximization of material benefits. Covers methodology, techniques and data currently unavailable from other sources, providing the essential base knowledge to support robust design, reliable manufacturing, and proper serviceability evaluation. Includes MATLAB codes, enabling engineers to easily apply the methods covered to their own engineering design challenges.

A hull is the watertight body of a ship or boat. Above the hull is the superstructure and/or deckhouse, where present. The line where the hull meets the water surface is called the waterline. The structure of the hull varies depending on the vessel type. In a typical modern steel ship, the structure consists of watertight and non-tight decks, major transverse and watertight members called bulkheads, intermediate members such as girders, stringers and webs, and minor members called ordinary transverse frames, frames, or longitudinal, depending on the structural arrangement. The shape of the hull is entirely dependent upon the needs of the design. Shapes range from a nearly perfect box in the case of scow barges, to a needle-sharp surface of revolution in the case of a racing multihull sailboat. The shape is chosen to strike a balance between cost, hydrostatic considerations (accommodation, load carrying and stability), hydrodynamics (speed, power requirements, and motion and behavior in a seaway) and special considerations for the ship's role, such as the rounded bow of an icebreaker or the flat bottom of a landing craft. The book Hybrid Ship Hulls, Engineering Design Rationales provides an overview of cutting-edge developments in hybrid composite-metal marine ship hulls, covering the critical differences in material processing and structural behavior that must be taken into account to maximise benefits and performance. Supporting the design of effective hybrid hulls through proper consideration of the benefits and challenges inherent to heterogenic structures, the book covers specific details of quality control, manufacturing, mechanical and thermal stress, and other behavioral aspects that need to be treated differently when engineering hybrid ship hulls.

Ship structures can be extremely large, and their structural arrangements are often complex and of a considerable variety. Local Strength of Ship Structures examines the basic aspects of ship structural analysis and design using mathematical tools, with an emphasis on an understanding of the physics of the behaviour of these structures. A fundamental understanding of these concepts is essential to use computer‐based tools effectively. In addition to mathematical models, reference is made to test data that have been obtained over many years and used to gain insight into ship structural behaviour. Features: Provides an introduction to local ship strength problems, structural arrangements and the different types of materials used in ship construction Examines the fundamentals of engineering mechanics with a particular focus on marine structure problems Covers the basics of ship structural analysis and design using mathematical tools

The sandwich panel materials are chosen for the skin and the core with consideration given to the joint with steel. Their advantages are highlighted over the other common alternatives.

This book presents selected contributions to the Pan-American Congress of Naval Engineering, Maritime Transport and Port Engineering (COPINAVAL), which is in its twenty-fifth edition and has become a reference event for the global maritime and port sector, attracting more and more participants from different countries. The 2017 congress was held in Panama City, Panama, bringing together a select group of scientists, entrepreneurs, academics and professionals to discuss the latest technological advances in the maritime industry.

The project dealt with mechanical issues related to hybrid ship hulls made with composite panels attached to a steel truss. The steel truss was designed to carry the bending loads of the hull girder, whereas the composite skins were designed to carry shear and water pressure loads. Experimental and numerical evaluations of the concept were performed. A six meter (20 ft) model, which had been built and initially tested in 2004 under a separate grant, was turned upside-down and tested to verify performance under hogging loads. After these hogging tests, the model was turned back and tested to failure after simulated internal blast by removal of select panels. Material tests and elastic-plastic analyses were performed. Four journal papers describing the work on the present hybrid ship hull concept have been submitted for publication (three have been published and the last one has been accepted).

In this book, the four authors show us the condensed experience how to design ship hull structures from a practical viewpoint. In three parts, the book presents the fundamentals, the theory and the application of structural design of hulls. The topics are treated comprehensively with an emphasis on how to achieve reliable and efficient ship structures. The authors have in particular introduced their experiences with the rapid increase of ship sizes as well as the introduction of ship types with a high degree of specialization. The associated early failures of these "new" structures have been analyzed to provide the readers with illustrations why structural design needs to be carried out on several levels in order to ensure that correct loading is applied and that local structural behaviour in properly understood.

A finite element tool has been developed to design and investigate a multi-hull composite ship structure, and a hybrid hull of identical length and beam. Hybrid hull structure is assembled by Titanium alloy (Ti-6Al-4V) frame and sandwich composite panels. Wave loads and slamming loads acting on both hull structures have been calculated according to ABS rules at sea state 5 with a ship velocity of 40 knots. Comparisons of deformations and stresses between two sets of loadings demonstrate that slamming loads have more detrimental effects on ship structure. Deformation under slamming is almost one order higher than that caused by wave loads. Also, Titanium frame in hybrid hull significantly reduces both deformation and stresses when compared to composite hull due to enhancement of in plane strength and stiffness of the hull. A 73 m long hybrid hull has also been investigated under wave and slamming loads in time domain for dynamic analysis.

"The monograph presents the main results of the author's sixty-year activity in science and engineering fields regarding the application of various multi-hull ships. The shown data are based mainly on the wide experimental results of the author. For fullness of description, some problems are explained in brief by the experimental results of other authors whose names are shown in the text and references. The scope of topics includes a brief history of applications, a list of types, hydrostatics and stability, towing resistance and propulsion in calm water and high seas, seaworthiness, maneuverability, external loads, structural arrangements and strength, general arrangement, and proposed concept designs. The scope of architectural types encompasses the variety of multi-hull 'species' from catamarans to trimarans as well as the other triple-hull ships, and ships with a small water-plane area (SWA ships). The type and size of ship range from small fast crafts to large ferries, from passenger ships to transatlantic container-carriers, and from high-speed patrol boats to naval combat and auxiliary ships. This is a development of a kind of technical encyclopedia previously published as three books: Multi-hull Ships by V. Dubrovsky and A. Lyakhovitsky (2001), Ships with Outriggers, by V. Dubrovsky (2004), Ships with Small Water-Plane Area, by V. Dubrovsky, K. Matveev, S. Sutulo, with detailed explanations of the newest data. In this respect, the book is unique and the most universal one written in English today. A brief history of applications is given as the base for future developments. The introduction contains a list of ship types and full terminology. Chapter One describes the specificity of general arrangement. Chapter Two speaks of how stability and non-sinkability differ clearly from the same qualities of mono-hulls. Chapter Three delves into resistance in calm water (major specificity and its use, series test results of catamarans with low-lengthening hulls, and twin- and triple-hull SWA models). Chapter Four is about seakeeping and performance on high seas (specifics of motion and the universal method of comparative evaluation). Chapter Five teaches readers about controllability and maneuverability specificity. Chapter Six shows structural strength (external loads, hull girder stress analysis and design, and simplified methods). Chapter Seven deals with d esign (basic factors, specific design algorithms and limitations, some new concepts: super-fast wave-piercing trimaran; 'semi-gliding' ships with small water-plane area, S/P SWA ships, feeder and fast container-carriers, motor yachts, carriers of helicopters and unmanned aircraft; transatlantic container-carriers, cruise ships, passenger ships for unequipped coasts, ships for seismic researching, multi-purpose pleasure and inexpensive research vessels, some small-sized vessels, and combat ships from corvettes to aircraft-carriers). The book is addressed to all kinds of readers involved in the production and operation of ships, including owners, designers, naval architects, marine engineers, professors and students, as well as planning and ship-operating managers"--From publisher's website.