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"Yachts Design and construction."
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Experimental Testing of Riveted Carvel Planks on Frames for Traditional Timber Structures
Traditional wooden boats are characterised by closely spaced frames, riveted to thick planks, leading to high thickness-to-span ratios. However, the effect of such closely spaced frames and thickness-to-span ratio remains uncharacterised. Consequently, four-point bending tests are undertaken to quantify the ultimate flexural strength and flexural modulus of wooden planks with up to 3 frames and thickness-to-span ratios from 0.0267 to 0.200. The results show that (i) a greater number of frames for a given span yields a reduction in specific stiffness but a constant specific strength; (ii) a maximum thickness-to-span ratio of 0.080 and 0.050 is recommended to ensure the strength and stiffness exceed regulatory default properties, respectively, and (iii) additional factors of safety would be needed for traditional construction to be included in existing structural regulations. These findings provide novel insights into the structural design of traditional wooden boats and may contribute to their future inclusion in regulatory frameworks.
Journal Article
The billionaire and the mechanic : how Larry Ellison and a car mechanic teamed up to win sailing's greatest race, the America's Cup, twice
Details the partnership between Larry Ellison, billionaire CEO of Oracle Corporation, and blue-collar mechanic Norbert Bajurin, offering a glimpse into their runs for the America's Cup and the design and building of these boats.
Book
Contested Waterlines: The Wave-Line Theory and Shipbuilding in the Nineteenth Century
Ship hydrodynamics in the nineteenth century was dominated by John Scott Russell's wave-line theory. Russell, a prominent British shipbuilder and scientist, argued that wavemaking was the primary source of resistance for ships, and that by designing ships according to trigonometric curves and proportions (the wave line) this resistance could effectively be eliminated. From the 1840s to the 1880s, shipbuilders such as John Willis Griffiths, Donald McKay and George Steers designed their clipper ships (like Sea Witch and Flying Cloud) and yachts (America) with wave-line hulls, while authors like Jules Verne referenced Russell's theory. The wave line slowly faded after William Froude developed his laws of ship resistance. The article examines how Russell's theory became accepted by technical experts and the wider public to become the most widely known ship hydrodynamic theory of the 1800s—a reminder of how a persuasive idea can take hold of an entire profession, and even the public, for a long time.
Journal Article
BIM-Based Marina Design and Semi-Automated Code Checking Process
The design process of marina projects is time-consuming due to the scale and complexity of the projects. It also involves an iterative process for studying layout alternatives. There are international and national codes and guidelines that should be considered during design to provide safe navigation and berthing for boats, enable smooth operation, meet market and user expectations, and avoid design mistakes. However, checking the design against codes after each design revision takes considerable amount of time. Therefore, a limited number of alternatives can be explored and code checking is performed only after the design is complete. In construction projects, code compliance checking is mostly performed by designers or local authorities manually. Manual checking process is vulnerable to inconsistent results even when performed by experts.This study aims to facilitate marina design and code checking by utilizing Building Information Modeling (BIM). BIM can be used for visualization, design review, documentation, and maintenance of marine infrastructure projects. However, in the literature and practice, BIM utilization for marina design is in its infancy. Therefore, in this study, the BIM model of a marina project was developed using Autocad Civil 3D and Revit software tools, by creating the required marina objects. The layout alternatives, by placement of finger piers, anchors and boats, were generated automatedly. Moreover, with the help of Dynamo tool, the code checking process was executed semi-automatically. The proposed process has a potential to evaluate more marina layout alternatives in a shorter time than the traditional design review process. Thus, the design can be optimized, and the quality of the projects can be improved. Additionally, it is expected that this study can present the potential of using BIM technologies and concepts in coastal structure projects.
Dissertation