Showing papers on "Shipbuilding published in 2001"

Multi-hull ships

Abstract: This book provides a systematic and detailed description of naval architecture of multi-hull ships. Topics include conceptual design, hydrostatics and stability, resistance and propulsion in calm water and high seas, seakeeping, controllability, structural strength and multi-hull concepts for various commercial, military and service applications. The scope encompassed multi-hull types from catamarans and trimarans to SWATH ships, wave-piercing, hydrofoil-assisted, super-critical-speed shallow-water vessels, and ships with more than three hulls of all sizes.

The resistance of ships in level ice. Discussion. Author's closure

Abstract: This paper present results form a recent research in the Hamburg Ship Model Basin (HSVA) to identify numerically model the various processes causing resistance to a ship advancing in level ice. A 3-D numerical model of the icebreaking process on the ship waterline was developed for investigating resistance forces on ship hulls.

Simulation of shipbuilding operations

Abstract: This paper discusses the objectives and requirements for a shipbuilding simulation. It presents an overview of a generic simulation of shipbuilding operations. The shipbuilding simulation model can be used as a tool to analyze the schedule impact of new workload, evaluate production scenarios, and identify resource problems. The simulation helps identify resource constraints and conflicts between competing jobs. The simulation can be used to show expected results of inserting new technologies or equipment into the shipyard, particularly with respect to operating costs and schedule impact. The use of DOD High Level Architecture (HLA) and Run Time Infrastructure (RTI) as an integration mechanism for distributed simulation is also discussed briefly.

Xml-based interoperability in the integrated shipbuilding environment (ise)

Abstract: Interoperability is one of the major challenges facing the U.S. shipbuilding industry today, and the new WWW technologies (in particular, XML) offer the opportunity for revolutionary improvements in this area. XML is being used within the Integrated Shipbuilding Environment (ISE) to achieve interoperability of shipbuilding systems technologies through the interchange of shipbuilding product information. The ISE project is a multi-shipyard project funded by the Maritech-Advanced Shipbuilding Enterprise (ASE) program. ISE has developed a reference architecture for systems technologies in the U.S. shipbuilding industry, and it has applied this reference architecture to the solution of the primary interoperability business drivers in the industry today. The ISE has identified both functional requirements and technical requirements for maritime product information sharing. This paper describes the ISE approach for using XML to accomplish application-to-application (A2A) interoperability for the shipbuilding industry.

Stalin's Ocean-going Fleet: Soviet Naval Strategy and Shipbuilding Programs, 1935-53

Abstract: Ships Telegraph "This is an essential work for the educated naval historian who knows his Soviet history." Times Literary Supplement "the authors of this fascinating book have ensured, however, that no portrait of Stalin lacking the element of his naval ambitions can be described as adequate

Simulation in shipyards: simulation of shipbuilding operations

Abstract: This paper discusses the objectives and requirements for a shipbuilding simulation. It presents an overview of a generic simulation of shipbuilding operations. The shipbuilding simulation model can be used as a tool to analyze the schedule impact of new workload, evaluate production scenarios, and identify resource problems. The simulation helps identify resource constraints and conflicts between competing jobs. The simulation can be used to show expected results of inserting new technologies or equipment into the shipyard, particularly with respect to operating costs and schedule impact. The use of DOD High Level Architecture (HLA) and Run Time Infrastructure (RTI) as an integration mechanism for distributed simulation is also discussed briefly.

Modeling and analysis of labor cost estimation for shipbuilding: the case of china shipbuilding corporation.

Abstract: Taiwan's shipbuilding industry confronts serious competition in the international market. Shipyards must acquire market information and give accurate quotations in order to obtain shipbuilding orders. The estimation of labor cost for shipbuilding is very important during the quotation stage. It is the purpose of this paper therefore to investigate the prevailing factors for labor cost and to construct models of man-hour estimation for building new ships for the China Shipbuilding Corporation. According to an empirical analysis, the effects of factors such as hull steel weight, main engine output, compensated gross tonnage, and technological progress on man-hours for construction have been confirmed. Furthermore, the comparison between the actual and estimated values for man-hours of construction shows that the derived models are highly accurate.

System analysis and primary design for naval architecture & ocean engineering-oriented project management information system

Abstract: This paper presents the characteristics and the problems in the building of naval architecture ocean engineering. It is pointed out that the project management in shipbuilding is a critical method in modern manufacturing technology. The authors discuss the theory, methods and technology in the development of naval architecture ocean engineering oriented project management information system. Grey system theory is introduced into PMIS to reduce the uncertainty and realize the dynamic control in management.

Enabling shipbuilding supply chain virtual enterprises

Abstract: The Shipbuilding Partners and Suppliers (SPARS) Consortium proposes to deploy shipbuilding Supply Chain (SC) Virtual Enterprises (VEs) which will integrate the shipbuilding supply chain composed of customers, partners, subcontractors, and suppliers. Virtual Enterprises enable sourcing and supply chain integration to provide business process interactions among shipyards and suppliers that are transparent of the underlying processes and computing environments of the participants.

About The Welding Effects On Thin Stiffened Panel Assemblies In Shipbuilding

Abstract: Last year, the definitive closure of one of the major French Shipyards was announced and planned for the beginning of 2000. It has really been a great loss for the whole shipbuilding industry. The ACH shipbuilder (Ateliers et Chantiers du Havre) is well-known in the world for having built several prestigious cuise-liners which are still in active service such as the Wind Star, Wind Song, Wind Spirit, Club Med One, Club Med Two, . . . The origine of this closure of the Yard financially weak came, among other unforeseen difficulties, from the delay of ship construction that was too much overlapped. One of the prime causes of this failure in the fabrication process was the distortion problem due to welding effects induced onto the thin stiffened panel assemblies of the superstructure of the first ship at fabrication stage (Stolt Achievement) of a series of three 37,000 dwt Chemical Parcel Tankers. The distortions were so important that all the straightening operations could not overcome the vicious welding defects. By recommendation of the shipbuilder and after checking-up the superstructure, two thermo-mechanical simulations on two 3D models of thin stiffened plate panels of a deck and of a bulkhead respectively, have been performed with a conventional FEM code using the IRCN numerical method. The calculation results obtained have shown and confirmed the buckling state reached by entire bulkhead panel. This panel buckled in fact under the effects of V butt weldings executed on board during the assembly operations. In this paper, some other applications of the method on thin stiffened plate panels are presented showing the influence of the welding sequence on the

An experience of modularity through design

Abstract: We aim to utilise the experiences of a marine industry-based design team to determine the need for research into a modular design methodology in an industrial environment. In order to achieve this we couple the outcome of a current design project with the findings of a recent literature survey with the objectives of firstly, clarifying why a methodology is required and, secondly, defining the key elements which the methodology would have to realise or address. The potential benefits of modularity have long been recognised in the shipbuilding industry. Many shipbuilders adopt a 'module' approach to ship construction whereby the ship structure is separated into a number of large structural 'blocks' to ease manufacture and manoeuvrability during construction. However, as understanding of the capabilities of modularity as a design tool develops there is increased interest in capitalising on the differing life phase benefits of modularity such as reduced design costs and time, increased ease of maintenance, upgrade, re-use, redesign and standardisation across individual products and product families. This is especially pertinent in naval shipbuilding where the maintenance of a class of ship requires that all previously designed ships in that class must be of similar outfitting and must be able to interface with the new ship, in terms of propulsion, weapons, communications and electronics, and thus often require some form of retrofit. Therefore, many shipbuilders are moving from viewing modularity as a purely 'manufacturing' principle to a design centred principle. However, as noted by Chang and Ward 'none of the design theories or tools in the mechanical world serves as an articulate procedure for designers to follow in practising modular design'. Thus, despite the identification of a need to introduce modular principles at an earlier stage than detail design and construction, there is little aid in the form of tools, techniques and methodologies for designers in practice.

Development of the Spatial Scheduling System and Its Applications in Shipbuilding Industry

Abstract: In this study, we deal a spatial scheduling system for the block painting process in the shipbuilding industry. In general, the spatial scheduling for the block painting process is a very complicated task. Because spatial allocation of each block in blasting and painting cells is considered simultaneously. Thus the spatial scheduling for the block painting process is the problem of planning and control of operation, which arises in shipyard. This system is developed for blocks to meet the delivery date given by the shipyard production planning system, to maximize space utilization of blasting and painting cells and to balance workload among working teams. And it has been tested using actual scheduling data from a shipyard and successfully applied in a paint shop in a shipbuilding company.

Evolution of step (estep): exchange of shipbuilding product model data

Abstract: Evolution of STEP (ESTEP) is a task within the MARITECH-ASE Integrated Shipbuilding Environment (ISE) Project building upon the work of the MariSTEP consortium and the NIDDESC standards development efforts. The purpose of ESTEP is to validate product model standards for the shipbuilding industry, implement product model data translators, and to further the development of Shipbuilding Application Protocols. Three of the major goals of ESTEP are developing a production-quality ship structure data exchange capability, expanding shipbuilding piping implementation efforts, and the exchange of parts and part libraries. Piping applications between the plant design industry and the shipbuilding industry are similar, and the AP used for translation of plant piping data (AP227-Plant Spatial Configuration) is much further along in the ISO process than the ISO Shipbuilding Piping AP (AP217). Both application protocols have been analyzed to determine the feasibility of using the plant AP as the ISE piping data exchange model. Shipbuilding structures will be expanding on the MariSTEP implementation that was based on a subset of the detail design data model. This will include the development of a STEP conformance class, a subset of the data model that covers a particular ship life-cycle phase or business case. Parts and part libraries are a joint effort with the ISE Electronic Commerce (EC) task to define an exchange mechanism. The critical need for such a mechanism was identified early in the MariSTEP exchange effort. ESTEP plans to exchange library part definitions, including geometric, parametric, and nongraphic attribute data. The current status, the achievements, and the future implementation plans of the ISE ESTEP are reviewed in this paper.

The evaluation of the effectiveness of modular outfitting of engine room machinery

Abstract: Modular outfitting plays an important role in shipbuilding to improve the effectiveness, save man-hours and have bigger competitive in the world. But the advantages above mentioned are benefit to shipbuilder for the most part. We don't know whether it has brought a convenience for crew to operate it or a benefit to owner. Now we want to use effectiveness to evaluate its' convenience to crew in this paper. How to determine the effectiveness of modular outfitting is an interesting project because modular ship is built through a new method of shipbuilding and there are not yet enough data to evaluate it. Traditionall>,. effectiveness' evaluation is carried out on a precise data. In many cases. however. there are some difficulties with application of traditional method to calculate it because lack of ebidence or due to the inability of the expert to make firm evaluation. Therefore fuzzy set is attempted to resolve this problem in this paper and got an appropriate result.

Strategies and outcomes in the two sectors of the Japanese shipbuilding industry

Abstract: The Japanese ocean-going shipbuilding industry has evolved into two distinct sectors and today's second tier or medium-sized firms build close to half the nation's output of large ocean-going vessels. Many vessels recently delivered by the major and the medium-sized shipbuilders are of similar size and complexity. However, the medium-sized shipbuilding companies of Japan differ considerably from the majors in business strategy and corporate structure. To date, studies published in English on the Japanese shipbuilding industry have focused mainly on the seven major firms. In this paper Japan's medium-sized shipbuilders are introduced. Their competitive environment, operations, and strategies are compared with those of the seven major firms. The relative strengths and weaknesses of the major and medium-sized shipbuilders are considered and the role of technological development in the long-term prospects of both is discussed.

National Security Assessment of the U.S. Shipbuilding and Repair Industry. A Report for the Carderock Division, Naval Surface Warfare Center, U.S. Department of the Navy

Abstract: The U.S. Department of Commerce, Bureau of Export Administration (BXA) performed this national security assessment of the U.S. shipbuilding and repair industry at the request and under the partial sponsorship of the Carderock Division. Naval Surface Warfare Center. BXA is delegated authority under Section 705 of the Defense Production Act of 1950, as amended, and by Executive Order 12656, to collect basic economic and industrial information to fulfill the Department's responsibilities regarding the health and competitiveness of defense-related sectors and technologies. The Office of Strategic Industries and Economic Security (SIES) is the operating unit within BXA with the responsibility for this data collection and analysis function.

Energy and Environment Dimension In Ship Manufacturing Processes

Abstract: This paper presents the issues of energy and environment in relation to the shipyard manufacturing process. The direct and indirect demands of energy in the shipbuilding industry are clarified. The Life Cycle Analysis (LCA) in ship production is addressed with emphasis on the methods commonly used to reduce energy consumption and other relevant harmful environmental impacts. The holistic approach of LCA is briefly outlined. The importance of rationalization of materials used in shipbuilding and ship scrapping is stressed. The modern approach of Ship Design for Environment is highlighted. The paper is concludes by stressing the importance of introducing the relevant energy and environment courses into the educational programs of Naval Architecture and Marine Engineering departments.

About the welding effects on thin stiffened panel assemblies in shipbuilding. in: marine technology iv

Abstract: This paper discusses some applications of a new method applied to thin stiffened plate panels in shipbuilding. The new method shows the influence of the welding sequence on the residual stresses and initial deflections of such thin plates as typically used in shipbuilding.

Portfolio of Ship designs : Early-stage design tools

Abstract: International shipbuilders have captured the majority of the global commercial shipbuilding market principally through the use of series ship design and construction, innovative technologies, new production processes, and improved facilities. While strides have been made in recent years to level the economic playing field and to improve U.S. shipbuilding methods and facilities, U.S. shipbuilding can still benefit from additional tools to increase competitiveness in the world marketplace. In 1996, the University of New Orleans, Gulf Coast Region Maritime Technology Center tasked M. Rosenblatt & Son, Inc. on a multi-year project to develop a Portfolio of World Class Ship Designs. The objective of the project was to provide a ready up-to-date reference of marketable ship designs and the tools to quickly tailor the designs to specific customer requirements, thereby assisting the U.S. shipbuilding industry to bid competitively and confidently. The Portfolio of World Class Ship Designs consists of standardized preliminary level ship designs and design synthesis models for various ship types, production models for labor and cycle times, cost estimating models, and interactive 3-D models of the ships and major equipment. The portfolio provides the resources needed to facilitate design evolution with manageable technical, cost, and program risk parameters.

The Production Plan and Control Analysis of Shipbuilding Enterprise on Shipbuilding Production Line

Abstract: Analyzes the production plan and control of shipbuilding enterprise on shipbuilding production line based on integrated manufacturing principle.This paper presents the idea and pattern on integration of PERT,MRPⅡ and JIT.It expounds the concepts about “integrated interim product",“ interim product group”,“ interim product wrap” and the relationship between them and the effect on production organization for shipbuilding production line for the first time.

Mobile Agent Based Supply Chain Management in Shipbuilding Industry

Abstract: This paper researches the agent based supply chain management in the shipbuilding industry. A general commerce model is used to model the supply chain management (SCM) and to implement a prototype SCM. The paper discusses how the China shipbuilding industry faces serious problems: low productivity and long construction periods. In order to cope with this situation, a mobile agent based supply chain management is provided. First, the paper summarizes the related research of supply chain management and intelligent agent and their application in shipbuilding industry. Second, a general commerce model that was developed by HAAS School of Business is used to design a shipbuilding supply chain management.

Entwicklung der Handelsschiffstypen und ihres Entwurfs

Abstract: The recent one hundred years continued to produce tremendous changes in all technical fields, including shipping, shipbuilding and also initial ship design being the sum of methods and tools for planning the production of commercial newbuildings in a first conceptual stage. Nevertheless, there are also a number of principles to be recognized in this evolution process, which maintained their validity all the time.

Entwicklung der Manövriertechnik in den zurückliegenden 100 Jahren

Abstract: Manoeuvring technolology combines the disciplines of naval architecture, engineering and hydrodynamics. Applications in ship control systems and in offshore technology became also relevant more recently. The paper describes important steps in manoeuvring technology since the foundation of the Schiffbautechnische Gesellschaft. Equipment technology and its fundamentals and, in particular, German contributions will be given primary attention. However, international interrelations in shipbuilding and offshore technology do not allow a portrayal from an isolated national standpoint. The role of the Schiffbautechnische Gesellschaft will be emphasised in view of the occasion. The paper closes with an attempt of outlining future development trends.