Structural Design of Aluminum Crewboats

1975 ◽  
Vol 12 (03) ◽  
pp. 267-274
Author(s):  
John S Spencer
Keyword(s):  
Gulf Of Mexico ◽  
Design Process ◽  
Structural Design ◽  
Full Scale ◽  
Design Practices ◽  
Worked Example ◽  
Mathematical Expressions ◽  
Current Design ◽  
Design Loads ◽  
Naval Architect

This paper is a commentary on the design of crewboats and similar deep-vee-hulled planing boats constructed of aluminum. It includes a description of current design practices and significant problems encountered in the design process. It suggests techniques that can be used to avoid deficiencies in the strength and integrity of the hull. Mathematical expressions that will enable the naval architect to estimate design loads over any portion of the hull bottom have been developed from the latest research efforts, and it is hoped that future full-scale testing will refine even further the methods of predicting slamming loads. Recommended design loads for other parts of a vessel, and allowable design stresses, are also given. A worked example has been included to demonstrate the design process for a typical Gulf of Mexico crewboat,

What happens when the design process meets community engagement?

2020 ◽  
Vol 6 (1) ◽  
pp. 21-42 ◽  
Author(s):  
Dylan Davis
Keyword(s):  
Community Engagement ◽  
Case Studies ◽  
Design Process ◽  
Qualitative Data ◽  
Design Work ◽  
Design Practices ◽  
Societal Needs ◽  
Current Design ◽  
Design Paradigm ◽  
Practical Implications

Community-engaged design is often framed as a binary opposite to commercial design. Whereas commercial design is usually characterized as a market-led paradigm focused on profits, community-engaged design is seen as a socially useful design paradigm that is concerned with addressing societal needs. This study uses qualitative data from four design project case studies to explore whether this understanding is in fact consistent with current design practices within commercial design studios. The findings of this study demonstrate that both commercial and community-engaged design practices are more similar than different. In addition, it is also suggested that it is not only the clients’ instructions and the commissions that determine the designers’ processes and practices, but the design studios’ intent, practice and values. This study has a number of practical implications for designers and design studios in how they address commercial and community-engaged design work.

scholarly journals Informing designs for learning when shifting to digital

2020 ◽  
Author(s):  
Stefan Hrastinski
Keyword(s):  
Design Process ◽  
Limited Attention ◽  
Design Practice ◽  
Descriptive Model ◽  
Design Work ◽  
University Teachers ◽  
Design Practices ◽  
Design For Learning ◽  
Current Design ◽  
The Way

AbstractThis paper is a response and considers practical and design implications of the article, The process of designing for learning: understanding university teachers’ design work by Bennett et al. (Educ Technol Res Dev 65:125–145, 2017). Bennett et al. guide us in better understanding teachers’ design practices and in discussions on how such practices could be improved. A key contribution of the article is presenting a descriptive model of the design process. As such, the article is focused on teachers’ current design work, while giving more limited attention to how teachers’ design practice could be improved. When looking forward, this response emphasizes that teachers should be encouraged to inform their designs for learning and iteratively improve their designs based on reflection and evaluation. If teachers take time to look into what is known and deliberately learn more along the way through reflection and evaluation, they will improve their understanding of how to design for learning.

Study on a Knowledge-Reuse-Based Rapid Product Design Process

2008 ◽  
Vol 392-394 ◽  
pp. 543-550 ◽  
Author(s):  
Hun Guo ◽  
Guo Xing Tang ◽  
Dun Wen Zuo ◽  
T.J. Liu ◽  
W.D. Jin
Keyword(s):  
Product Design ◽  
Design Process ◽  
Iterative Process ◽  
Process Model ◽  
Design Reuse ◽  
Knowledge Reuse ◽  
Construction Machinery ◽  
Current Design ◽  
Product Design Process ◽  
Three Factor

Design reuse is the application of past designs knowledge and successful experience to current design process and it is a significant method for rapid design. A knowledge-reuse-based rapid product design model is proposed and a three-factor product design iterative process model is studied. Finally, it is applied successfully in the rapid product design of construction machinery combining with the requirement of the construct machinery product design.

A Synthesis of Aluminum Crewboat Structural Design

1982 ◽  
Vol 19 (01) ◽  
pp. 52-72
Author(s):  
William A. Henrickson ◽  
John S. Spencer
Keyword(s):  
Structural Design ◽  
Beam Theory ◽  
Coast Guard ◽  
Observation Data ◽  
Plate Girders ◽  
Worked Example ◽  
Theory Versus ◽  
Grillage Analysis ◽  
Design Stress

The need exists for a simplified structural review guide to enable U.S. Coast Guard marine inspectors to verify the structural adequacy of aluminum crewboats. The authors have developed such a guide. Typical existing crewboat forms and service speeds have been used to reduce the determination of impact pressures to a function of length and displacement. A design stress limit for the cyclic loading of the bottom structure has been determined based on wave observation data. Plating design has been verified by a comparison of sizing by beam theory versus elastoplastic analysis. A simplified grillage analysis has been used to determine the level of support provided by longitudinal plate girders or keelsons. A worked example and tables of section moduli for typical extrusions attached to plating are included as appendices.

An Integrated, Computer-Based Method for Rapid-Prototyping Weapons-Scale Marine Propulsors Using Stereolithography

1997 ◽  
Author(s):  
Robert M. Koch
Keyword(s):  
Rapid Prototyping ◽  
Design Process ◽  
Structural Design ◽  
Development Time ◽  
Underwater Vehicles ◽  
Process Efficiency ◽  
Two Phase ◽  
Unmanned Underwater Vehicles ◽  
Reduce Development Time ◽  
Computer Based

Abstract The present work describes an integrated, two-phase computer-based method for fabricating marine propulsors using stereolithography. This new methodology seamlessly integrates stereolithography rapid prototyping techniques with the hydrodynamic design, structural design, and prototype testing of advanced marine propulsors in order to greatly increase the design process efficiency and reduce development time. Its use as applied to the design, fabrication, and testing of advanced propulsor prototypes for small weapon’s-scale undersea vehicles (e.g., Unmanned Underwater Vehicles (UUVs), lightweight and heavyweight torpedoes, etc.) is described in order to demonstrate specific strengths of the new method.

Yacht Keels - An Experimental Study

1975 ◽  
Author(s):  
Pierre DeSaix
Keyword(s):  
Experimental Study ◽  
Aspect Ratio ◽  
Center Of Gravity ◽  
Full Scale ◽  
Optimum Size ◽  
Hull Form ◽  
Size And Shape ◽  
Aspect Ratios ◽  
Current Design ◽  
Lateral Area

Model tests are presented for a series of nine keels; three aspect ratios, three sweep angles; all at constant lateral area, taper ratio and thickness ratio. The series is shown to bracket current design trends. These keels are all tested on the same canoe body, over a range of heel angles, lee-ways, and speeds. The results are presented in terms of full-scale sailing performance with due allowance for a reasonable ballast ratio and resulting vertical center of gravity for each keel. Optimum sweep angles for each aspect ratio are found. A second series of three keels, geometrically similar but varying in lateral area, is provided. Predictions of windward performance demonstrate the effect of keel size. An optimum size is found for three wind strengths. The results are for one hull form only. However, a method is suggested for estimating the effect of keel size and shape for any proposed design.

scholarly journals 3D Modelling, Design and Safety Management in High Rise Building u sing Bim

2021 ◽  
Vol 11 (1) ◽  
pp. 41-50
Author(s):  
Mohammed Waheed ◽  
◽  
Mahmad Naheed ◽  
Parvez Patel ◽  
Syed Mubashir Hussain ◽  
...  
Keyword(s):  
Design Process ◽  
3D Modeling ◽  
Structural Design ◽  
Safety Management ◽  
Information Modeling ◽  
Analysis And Design ◽  
High Rise ◽  
High Rise Building ◽  
Traditional Design ◽  
Building Information

In this works 3D modeling, design and safety management of high rise building using building information modeling (BIM) technology is carried out.. Initially a AutoCAD plan with all its salient features is developed following byelaws of high rise building. Then the 3D modeling and rendering of high rise building is done in the Revit architecture of the 2D plan which is imported from the AutoCAD. The analysis and design of high rise building is carried out using ETabs software. Apart from the structural design Mechanical, Electrical and Plumbing (MEP) services design is carried out using BIM technology . The layout of fire safety system is specified efficiently with use of BIM in co-ordination with MEP services. The application of BIM based design process resulted in considerable time reduction in compression with traditional design process and the holistic design of the high rise building is carried out with the compatibility of different softwares.

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