scholarly journals Underwater Welding - Present Status and Future Scope

1970 ◽  
Vol 3 (1) ◽  
pp. 38-47 ◽  
Author(s):  
Jyotsna Dutta Majumdar
Keyword(s):  
Key Words ◽  
Present Status ◽  
Naval Architecture ◽  
Underwater Welding ◽  
Marine Application ◽  
Marine Engineering

Welding in offshore and marine application is an area of research and understanding where, many problems are still unsolved. In the present paper, a brief description of the different commercial underwater techniques has been made. The problems in underwater welding have also been discussed in context to the existing welding techniques. Detailed description of a few advanced welding techniques has also been made. Finally, the scope of further research has been recommended. Key words: Under water welding, TIG, MIG, SAW, laser, frictionDOI: 10.3329/jname.v3i1.927Journal of Naval Architecture and Marine Engineering 3(2006) 39-48

scholarly journals Effective simple methods for numerical modelling of marine engines in ship propulsion control systems design

2011 ◽  
Vol 8 (2) ◽  
pp. 129-147 ◽  
Author(s):  
M. Altosole ◽  
Massimo Figari
Keyword(s):  
Control Systems ◽  
Gas Turbine ◽  
Naval Architecture ◽  
Detailed Model ◽  
Ship Propulsion ◽  
Control Schemes ◽  
Marine Engines ◽  
Propulsion Control ◽  
Marine Engineering ◽  
Engine Power

In the last year, the Department of Naval Architecture and Marine Engineering of Genoa University (now Department of Naval Architecture, Marine Technology and Electrical Engineering) collaborated to the design of the propulsion automation of two different naval vessels; within these projects the authors developed different ship propulsion simulators used to design and test the propulsion control schemes. In these time-domain simulators, each propulsion component is represented by a specific mathematical model, mainly based on algebraic and differential equations. One of the key aspects of the propulsion simulation is the engine dynamics. This problem in principle can be dealt with models based on thermodynamic principles, which are able to represent in detail the behaviour of many variables of interest (engine power and speed, air and gas pressures, temperatures, stresses, etc.). However, thermodynamic models are often characterized by a long computation-time and moreover their development usually requires the knowledge of specific engine information not always available. It is generally preferable to adopt simpler simulation models, for the development of which, very few kinds of information are necessary. In fact, for the rapid prototyping of control schemes, it is generally more important to model the whole plant (in a relatively coarse way) rather than the detailed model of some components. This paper deals with simple mathematical methods, able to represent the engine power or torque only, but they can be suitably applied to many types of marine engines in a straightforward way. The proposed simulation approaches derived from the authors’ experience, gained during their activity in the marine simulation field, and they are particularly suitable for a fast prototyping of the marine propulsion control systems. The validation process of these particular models, regarding a Diesel engine, a marine gas turbine and an electric motor, is illustrated based on the sea trials data and engine manufacturers’ data. Keywords: Dynamic simulation; marine engines performance; gas turbine; propulsion control. doi: http://dx.doi.org/10.3329/jname.v8i2.7366   Journal of Naval Architecture and Marine Engineering 8(2011) 129-147

scholarly journals KOMPETENSI PROGRAM STUDI DIPLOMA TEKNIK PERKAPALAN DALAM INDUSTRI MARITIM INDONESIA

2010 ◽  
Vol 16 (1) ◽  
pp. 16
Author(s):  
Mohd Ridwan ◽  
Eko Yulianto
Keyword(s):  
Foreign Exchange ◽  
National Income ◽  
Maritime Transportation ◽  
Maritime Industry ◽  
Naval Architecture ◽  
Ship Building ◽  
The Creation ◽  
Marine Engineering ◽  
Diploma Program ◽  
New Jobs

Mohd Ridwan, Eko Yulianto, in paper competency of naval architecture diploma program on Indonesian maritime industry explain that Shipbuilding engineering professionals is part of the leading maritime industry is expected to become the motor of development of national maritime fleet in the implementation of cabotage (Impres No.5, 2005), this will reduce foreign exchange spending nearly 99 trillion rupiah per year due to the use of foreign fleets, and the creation of new jobs as a supporter of the maritime industry. So the presence of workers who have competence in the field of shipbuilding (ship building, naval architecture, marine engineering enginerring and maritime transportation) is urgently needed and their capability to compete with other countries that previously controlled the sea as a source of national income should be the Indonesian government's attention. Keywords: Professional shipbuilding techniques, competency

The Society of Naval Architects and Marine Engineers and the Conquest of Innerspace

1970 ◽  
Vol 7 (01) ◽  
pp. 1-9
Author(s):  
E. M. MacCutcheon
Keyword(s):  
International Collaboration ◽  
Advisory Group ◽  
Ocean Engineering ◽  
Naval Architecture ◽  
Engineering Problems ◽  
The Future ◽  
Marine Engineering ◽  
And Control ◽  
Marine Engineers

National planners are developing programs for surveying and exploiting the oceans. A decade of international collaboration is contemplated for the 1970's. The focus is on exploitation as contrasted to research, so the major problems will be engineering problems. The disciplines of naval architecture and marine engineering, and the technologies of ship designing, shipbuilding and ship operating will feature in this future national-international exploitation of the world's oceans. The Society of Naval Architects and Marine Engineers has espoused the broader domain of ocean engineering for the future scope of the Society's activities. Policies and plans have been completed. Problem areas and possible SNAME activities have been identified and assigned for action. An Ocean Engineering Advisory Group has been operating for two years in carrying out this work and will continue to maintain and control an active SNAME participation in ocean engineering. This paper summarizes the aforementioned plans and activities and mentions 19 interesting ocean engineering focal projects which might be useful to advance our capabilities for exploitation of the ocean resources.

scholarly journals Studious Ship Design: A Review of UCL MSC Warship Designs

2019 ◽  
Author(s):  
R. J. Pawling ◽  
C. Savage
Keyword(s):  
Academic Staff ◽  
Ship Design ◽  
User Requirements ◽  
Naval Architecture ◽  
Marine Engineering ◽  
The Uk ◽  
Technical Solutions

It is more than 50 years since the UK MoD teaching of warship design moved from Greenwich to UCL, and the course has evolved into MSc Naval Architecture and MSc Marine Engineering courses covering both warships and other complex service vessels, with students from navies, governments and industry worldwide. This presentation will describe this years’ designs, outlining the technical solutions proposed to a diverse set of user requirements set by the academic staff. Some of the educational aspects and challenges of the design exercise course will also be described. Portions of this paper are reproduced from reference [1]; which provides a more detailed example of the work put into a typical MSc SDX ship design.

scholarly journals An Ecological Overview of Red Panda

1970 ◽  
Vol 3 ◽  
pp. 149-152 ◽  
Author(s):  
Arun Adhikari
Keyword(s):  
Key Words ◽  
Biodiversity Conservation ◽  
Present Status ◽  
Habitat Destruction ◽  
Habitat Conservation ◽  
Wild Mammals ◽  
Red Panda

According to recent report, 20% of world's wild mammals are threatened with extinction. One of them, Red panda is also in the front list. Decreasing number of Red Panda compells us to think about all its related activities and our role to conserve it. Habitat destruction is one of the main cause of its reducing number. So, we need to keep in mind about its characteristics and requirements, seriously. This article is trying to provide imformation about present status of Red Panda which gives a way forward for its better management. Researches on Red Panda are found in very limited numbers in Nepal. This article is written to promote the research on this species intensively which can help in biodiversity conservation from our side. Key Words: Red Panda, Bamboo, Solitary, Threatened, Behavior, Habitat, Conservation DOI: 10.3126/init.v3i0.2506 The Initiation Vol.3 2009 p.149-152

Teaching Ship Design with a Computer Aid: The Michigan Spiral System

1979 ◽  
Vol 8 (2) ◽  
pp. 107-116
Author(s):  
John B. Woodward
Keyword(s):  
Undergraduate Student ◽  
National Science Foundation ◽  
Computer Software ◽  
Ship Design ◽  
University Of Michigan ◽  
Naval Architecture ◽  
Computer Aid ◽  
National Science ◽  
Marine Engineering ◽  
The University

An integrated set of computer software known as SPIRAL has been developed at the University of Michigan, Department of Naval Architecture and Marine Engineering, funded by a grant from the National Science Foundation. Features of the system, its advantages as a resource for the undergraduate student, and some deficiencies, are discussed. Its use in teaching the principles of ship design is sketched.

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