Marine Technology and Sname News最新文献

{"title":"NEW INSIGHTS INTO VOITH SCHNEIDER TRACTOR TUG CAPABILITY","authors":"B. Hutchison, D. Gray, S. Jagannathan","doi":"10.5957/MT1.1993.30.4.233","DOIUrl":"https://doi.org/10.5957/MT1.1993.30.4.233","url":null,"abstract":"The emerging use of tanker escort in restricted waters requires tugs that are capable of rendering effective retarding and steering assistance to large ships operating in the 6 to 12 knot speed range. This paper presents findings from a coordinated program of model tests, computer simulations and full scale trials which have yielded new insights into the capabilities of Voith Schneider propelled tractor tugs. The emergency assist capabilities are shown as speed- dependent contours of the vector assist force in the coordinates of the assisted vessel. For tractor tugs the capabilities increase with speed. Simulations of tug assisted tanker manoeuvres at 10 knots show that the tractor tug is more effective than a conventional tug in controlling the behaviour of a disabled tanker.","PeriodicalId":49310,"journal":{"name":"Marine Technology and Sname News","volume":"1 1","pages":"233-242"},"PeriodicalIF":0.0,"publicationDate":"1993-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79896061","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Anatomy of Tanker Grounding","authors":"T. Wierzbicki, D. Peer, E. Rady","doi":"10.5957/MT1.1993.30.2.71","DOIUrl":"https://doi.org/10.5957/MT1.1993.30.2.71","url":null,"abstract":"","PeriodicalId":49310,"journal":{"name":"Marine Technology and Sname News","volume":"1 1","pages":"71-78"},"PeriodicalIF":0.0,"publicationDate":"1993-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85268348","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"SEAWOLF DESIGN FOR MODULAR CONSTRUCTION","authors":"S. Bevins, C. Clemens","doi":"10.5957/MT1.1992.29.4.199","DOIUrl":"https://doi.org/10.5957/MT1.1992.29.4.199","url":null,"abstract":"There has been much discussion on designing for producibility, new and innovative construction techniques, changing traditional relationships between engineering design and construction planning, and the requirement for new design products providing information beyond the class design system viewpoint to support the construction of interim products. The purpose of this paper is to continue this dialogue and provide some insight into how the design process has changed by offering for discussion, information, or use the specific process that the SEAWOLF design agent is using today in the development of sectional construction drawings.","PeriodicalId":49310,"journal":{"name":"Marine Technology and Sname News","volume":"3 1","pages":"199-232"},"PeriodicalIF":0.0,"publicationDate":"1992-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79058207","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"WEIGHT DEFINITION AND CONTROL FOR FAST CRAFT","authors":"J. C. Daidola, Christopher J. Reyling","doi":"10.5957/MT1.1991.28.6.329","DOIUrl":"https://doi.org/10.5957/MT1.1991.28.6.329","url":null,"abstract":"A standard for weight definition and an approach to weight control is presented for modern motor yachts and other craft. This includes a definition of weight and loading conditions for these vessels which can be related to attainable vessel speeds. The weight control plan addresses concept through detail design, construction, delivery and service life. The procedure is adaptable to all types of hull structural material. Weight curves developed from regression of previous vessel data are included and cover a variety of pleasure and commercial craft. Examples of the effect of weight control on speed are given. Recommendations for application of the procedures are offered.","PeriodicalId":49310,"journal":{"name":"Marine Technology and Sname News","volume":"15 1","pages":"329-339"},"PeriodicalIF":0.0,"publicationDate":"1991-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82176459","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"GENTLEMEN, CHOOSE YOUR WEAPONS - THE RACE CONDITIONS FOR THE AMERICA'S CUP","authors":"K. Kirkman","doi":"10.5957/MT1.1990.27.2.94","DOIUrl":"https://doi.org/10.5957/MT1.1990.27.2.94","url":null,"abstract":"","PeriodicalId":49310,"journal":{"name":"Marine Technology and Sname News","volume":"100 1","pages":"94-100"},"PeriodicalIF":0.0,"publicationDate":"1990-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75605159","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"STATIC PRESSURE DISTRIBUTIONS OVER 2D MAST/SAIL GEOMETRIES","authors":"S. Wilkinson","doi":"10.5957/MT1.1989.26.4.333","DOIUrl":"https://doi.org/10.5957/MT1.1989.26.4.333","url":null,"abstract":"A variable-camber airfoil with integral pressure tappings has been built to investigate the nature of the flows around two-dimensional, highly cambered, sail-like airfoil sections with circular masts. Data have been obtained in the form of static pressure distributions over representative ranges of Reynolds number, camber ratio, incidence angle, mast diameter/chord ratio and mast angle. Two sail shapes--based on the NACA a = 0.8 and NACA 63 mean-line camber distributions--were involved in the test program. All flow regimes present have been identified and related to the salient model and flow parameters.","PeriodicalId":49310,"journal":{"name":"Marine Technology and Sname News","volume":"362 1","pages":"333-337"},"PeriodicalIF":0.0,"publicationDate":"1989-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82641825","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Designing the Future U.S. Naval Surface Fleet for Effectiveness and Producibility","authors":"C. Graham, M. Bosworth","doi":"10.21236/ada444499","DOIUrl":"https://doi.org/10.21236/ada444499","url":null,"abstract":"David Taylor Research Center is just commencing investigations into a new manner of defining future fleet architectures. The cost of current performance-driven ship designs has increased at a rapid rate. While it is true that a warship designed with insufficient performance is of meager utility, it is also true that the best performing warship design is of no utility if never built. Both performance and affordability are required if sufficient numbers of ships are to be built to counter the threat. By designing a future fleet architecture with producibility as a major requirement from the start, we hope to impact the acquisition cost significantly. One battle force concept titled \"Distribute, Disperse, Disguise and Sustain\" suggests two fundamental surface ship types; the Carrier of Large Objects (CLO) and the Scout Fighter. A CLO feasibility design in progress, Carrier Dock Multimission, is outlined to inform shipbuilding researchers of an initiative that promises to have significant impact on naval ship procurement and provide increased visibility within the U.S. Navy on producibility issues. Before an attempt is made to conceptualize a future U.S. naval surface fleet, to help create a vision of the U.S. Navy for the year 2030 and beyond, the shortcomings of the current surface Navy must be addressed first. An honest assessment of where we are now is a must for us to determine where we need to be in the future and how to get there. Current shortcomings THE SHORTCOMINGS of greatest significance in the curren~ surface Navy that are related to hull, mechanical and electri cal (H,M&E) technologies are: • highly observable ship signatures, • easily discriminable ship signatures, • concentration of operating functions, • logistically demanding, and • programmatically inefficient and expensive to acquire. The ships of the surface Navy are highly observable by radar, acoustic, infrared, magnetic, and electro-optical sensors. As the enemy's surveillance, tracking, and classification capabilities increase with time, the advantage will continue to shift more and more to the enemy. The result is that the enemy can, in most cases, engage our surface forces outside the battle space of our own weapon systems. This forces us into a defensive posture that requires us to shoot down the \"arrows\" (cruise missiles) rather than the \"archers\" (aircraft, submarine and surface ship launch platforms). Forty-two classes of surface ships currently operate in our carrier battle groups, surface action groups, amphibious task forces, logistic support groups, and convoy escort groups. Each of these ship classes (and, indeed, most of the ships within a particular class) has unique signatures that allow the enemy to discriminate ships within a surface force. This plays to the enemy's strength of massing firepower on whatever type of ship their strategy calls for. We have generally concentrated required operating functions on large ships. This platform architecture, coupled with","PeriodicalId":49310,"journal":{"name":"Marine Technology and Sname News","volume":"28 1","pages":"142-152"},"PeriodicalIF":0.0,"publicationDate":"1989-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67988295","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Diaphragm Couplings Versus Gear Couplings for Marine Applications","authors":"J. Mancuso, J. H. Paluh","doi":"10.5957/MT1.1988.25.4.281","DOIUrl":"https://doi.org/10.5957/MT1.1988.25.4.281","url":null,"abstract":"There are many variables in gear couplings that can affect their characteristics, including tooth design, materials, and lubrication methods. All couplings react on connected equipment. A system designer must consider these reactions. If a gear coupling is chosen, there are many characteristics that are difficult to predict; therefore, one must conservatively estimate the maximum forces and moments that can be anticipated. This usually will make the system rather large, and heavier than may be required. The diaphragm coupling usually has more predictable coupling characteristics, which can make a designer's life easier. This paper compares the characteristics of diaphragm couplings versus the gear (dental) type couplings in marine applications. Applications of couplings for main propulsion and auxiliary equipment are discussed. The methods used to analyze the design and calculate the forces and moments generated by both the gear coupling and the diaphragm coupling are also provided. These analyses are used to show that the forces and moments generated by a diaphragm coupling are not only predictable, but are usually lower than those of a gear coupling. It is shown that a diaphragm coupling can provide a more predictable and reliable alternative to the gear coupling for advanced marine applications.","PeriodicalId":49310,"journal":{"name":"Marine Technology and Sname News","volume":"40 1","pages":"281-292"},"PeriodicalIF":0.0,"publicationDate":"1988-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73742357","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"THE DESIGN AND OPERATION OF PUMPS FURNISHED FOR MARINE CARGO SERVICE, PART 1: CENTRIFIGAL CARGO PUMPS","authors":"William J. Sembler","doi":"10.5957/MT1.1988.25.1.1","DOIUrl":"https://doi.org/10.5957/MT1.1988.25.1.1","url":null,"abstract":"To a pump manufacturer, marine cargo service represents one of the most demanding applications for which he can design and furnish equipment. In addition to being subjected to the stresses encountered in a shipboard environment, cargo pumps must often perform over a wide range of operating conditions and handle multiple fluids with different viscosities, vapor pressures, specific gravities, temperatures, and material requirements. In this first part of a two-part article, the author reviews characteristics of the different types of pumps used for marine cargo service, with an emphasis on the special features that should be incorporated into their design for this rigorous duty. Different types of automatic self-priming/stripping systems available for use with these cargo pumps are also examined. Pump operation is discussed, including the significant impact that system design has on proper pump performance.","PeriodicalId":49310,"journal":{"name":"Marine Technology and Sname News","volume":"9 38 1","pages":"1-29"},"PeriodicalIF":0.0,"publicationDate":"1988-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86263083","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"PERFORMANCE OF LIGHT- AND HEAVY-DISPLACEMENT SAILING YACHTS IN WAVES","authors":"J. Gerritsma, J. Keuning","doi":"10.5957/MT1.1989.26.1.14","DOIUrl":"https://doi.org/10.5957/MT1.1989.26.1.14","url":null,"abstract":"Experiments with light- and moderate-displacement sailing yacht models have been carried out in the Delft Ship Hydromechanics Laboratory to investigate heave, pitch, and added resistance in regular waves. The experiments included conditions with and without heel and leeway angles. The results are analyzed and compared with calculations based on a strip theory method. Numerical methods are used to predict and to compare the performance of sailing yachts in realistic irregular-wave conditions.","PeriodicalId":49310,"journal":{"name":"Marine Technology and Sname News","volume":"43 1","pages":"14-22"},"PeriodicalIF":0.0,"publicationDate":"1987-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89522081","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}