... Today's powertrains for marine applications are characterized by their high-power density in combination with the requirements for a light construction and the lowest possible acoustic transmission. This is no longer coupled only to military vessels or luxury yachts but is becoming more and more...

... in propeller design. marine transportation united states government cavitation propeller noise wakefield requirement cavitation inception diagram vortex cavitation thickness variation notation noise propeller efficiency circulation propulsion camber Propeller and Shafting Symposium...

... In the design process of a new vessel, ship speed-power predictions provide designers valuable insight regarding the expected performance of the vessel with respect to the contractual speed requirements. In this study, two different methods for acquiring this speed-power prediction, being model...

... requirements commonly observed across most navies. The demonstrated evaluation shows that the resultant propulsion plant configurations may not fully achieve all defined requirements, which are often conflicting, but represent a good compromise to best meet the operation requirements based on defined...

... and optimization approach to vessel machinery design. artificial intelligence optimization problem constraint pressure pulse pressure side cavitation side cavitation efficiency engine equipment selection manual design machinery installation pareto front propeller design requirement cavitation...

... reducing the total ownership cost for the U.S. Navy. us government marine transportation ship seal technology shock-qualified stern tube seal inflatable seal maintenance navy operation stern tube seal requirement shaft operational condition tube seal face seal material total ownership...

... learned test specimen government-industry cooperation tensile test specimen welder navy nickel-aluminum bronze procedure bend test requirement shaft lof weldment pwta welding nab Of Smut, Magic Backing Bars, and Hybridization: Lessons Learned in Government-Industry Cooperation...

... leakage pag requirement stern tube lubricant tube lubrication propeller mineral oil lubricant bearing Water Soluble, Environmentally Acceptable Lubricants For Stern Tube Applications John V. Sherman (AM) American Chemical Technologies, Inc. Stern tube lubricants; used to lubricate the bearings...

... thornhill bsc leakage stern tube requirement stern tube bearing sea water legislation interface installation bearing The Challenge of Stern Tube Bearings and Seals Mr. John Thornhill BSc (Hons) CEng FIMechE, General Manager of Seals, Wärtsilä UK Ltd In recent times, there has been a change...

... Recently several classification societies have redefined and made more stringent their requirements for coupling bolts. Different bolting methods and their requirements have been further defined. This includes fitted bolts, non-fitted bolts and combinations thereof. For fitted bolts, the term...

... circumferential seal ring assembly application leakage circumferential seal seal ring requirement shaft flooding bearing force bulkhead seal garter spring compartment lip seal Bulkhead Seals - A Sealing Solution Brian P. Roche ABSTRACT Typical Marine bulkhead seals today utilize a non-metallic...

... requirement shaft loading lip seal mrg Alternatives in Gearbox Seals for Main Drive Gearboxes Brian P. Roche ABSTRACT A· variety of sealing devices have been used to seal Marine Main Reduction Gears. One means of sealing Main Reduction Gears today is the labyrinth seal. While the labyrinth seal has...

.... During the investigation, several problems associated with the waterborne bearing military specification were noted. These problems included: areas of unclear guidance or requirements, allowance for variation within the manufacturing process, and inconsistent sampling size requirements. In addition...

... conditions at bearings. machine learning evolutionary algorithm freight & logistics services artificial intelligence optimization problem marine transportation mating pool selection allele deflection disturbance procedure genetic algorithm requirement bearing reaction girder...

... A propeller was designed and tested for the National Oceanic and Atmospheric Administration (NOAA) fisheries research vessel FRV-40. The ship is propelled by a single propeller operating in the wake of a skeg. The radiated noise goal required the propeller to be capable of operating cavitation...

... but has not kept up with the development of new types of propulsion systems. The Coast Guard tasked John J. McMullen Associates, Inc. to propose a new standard with updated requirements for conventional propulsion systems, and to include requirements in the new standard for nonconventional propulsion...

... fiber requirement shaft coupling arrangement bearing water jet critical speed Utilization of Carbon Fiber Torque Tubes in Ultralight, High Powered Propeller Shafting Gerhard Kirschey, Dipl-Ing (V), Lawrence A. Burich (V) ABSTRACT There has long been a need for increasing the limits ofpropeller...

... of blade; viscosity effect corrections. artificial intelligence mishkevich ship thickness accuracy propeller efficiency formula calculation efficiency viscosity quadrature coefficient procedure requirement correction propeller marine propeller singular integral circulation...

... Except for those specials applications where requirements dictate the use of counterrotating propellers, the choice between a single propeller and counterrotating propellers involves a tradeoff related to the higher efficiency of the counterrotating propellers and the greater complexity...

... Strength requirements on propellers in backing operations are hardly defined but they are found necessary for highly skewed propellers. The present paper illustrates how the MARIN design procedure copes with this aspect. Relevant analysis conditions for backing operation and allowable stress...