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.
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.
|Author||: Jun Cao|
|Release Date||: 2006|
|Pages||: 374 pages|
A hybrid ship structure could potentially combine the benefits of both steel and composites to obtain possible superior characteristics. In this dissertation, a hybrid ship hull made of a steel truss and composite sandwich skins was investigated. The steel truss was designed to carry the bending loads, whereas the composite skins were designed to carry shear and water pressure loads. A 142 meter ship hull, similar to a destroyer in terms of size, weight and speed, was designed, finite element analyzed and optimized. A 6 meter model was subsequently developed, finite element analyzed, manufactured and tested under sagging loads. The model was loaded to 36% above the design load, at which point there was substantial yielding and residual deformation of the steel truss. However, there was no indication of failure in any of the composite sandwich panels, nor in the bonds between the panels and the steel truss. Joints in hybrid structures were also investigated in the dissertation, including joints between a steel hull and a composite superstructure, and between a stainless steel Advanced Double Hull and a composite bow/stern. Joints were designed and specimens were manufactured and tested mechanically and environmentally.
Forest trees cover 30% of the earth's land surface, providing renewable fuel, wood, timber, shelter, fruits, leaves, bark, roots, and are source of medicinal products in addition to benefits such as carbon sequestration, water shed protection, and habitat for 1/3 of terrestrial species. However, the genetic analysis and breeding of trees has lagged behind that of crop plants. Therefore, systematic conservation, sustainable improvement and pragmatic utilization of trees are global priorities. This book provides comprehensive and up to date information about tree characterization, biological understanding, and improvement through biotechnological and molecular tools.
|Release Date||: 1988|
|Pages||: 342 pages|
|Author||: Bastian Sarh|
|Release Date||: 2005|
|Pages||: 348 pages|
|Author||: Mahmoud Ali Ahmed Mohamed|
|Release Date||: 2005|
|Pages||: 329 pages|
|Author||: National Research Council,Division on Engineering and Physical Sciences,Commission on Physical Sciences, Mathematics, and Applications,Naval Studies Board|
|Publisher||: National Academies Press|
|Release Date||: 1997-09-11|
|ISBN 10||: 0309058791|
|Pages||: 1102 pages|