Marine link
 

Low Noise Mechanical Drive Propulsion System Alternatives

For more than 80 years, mechanical drive propulsion systems consisting of reduction gears and various prime movers have proven their reliability and performance onboard numerous commercial and navy ships. GE has more than 40 years of continuous experience in the design, manufacture and performance/noise testing of SSN, SSBN, CVN and DDG main propulsion reduction gears, and has reportedly accumulated the largest industrial database of Naval propulsion system noise performance. This database was used extensively in the development of the DDG 51 main reduction gears (MRGs), and yielded a system with noise performance at least 18 dB below specification. Based on this extensive experience, GE believes that mechanical drive propulsion systems can deliver the low noise, high power density, operational flexibility, reliability and performance needed to satisfy 21th century Naval ship mission requirements. Currently, GE has approximately 240 MRGs in service on over 170 U.S. Navy surface ships and submarines. These MRGs combine high reliability with high availability (approx. 99 percent), high efficiency (greater than 98 percent), high power density (generally less than 0.1 lb./ft.-lb. output torque), and very low maintenance designs. GE's low noise propulsion gearing satisfies the operational and noise requirements of these ships.

Propulsion System Noise Sources The first step in developing a low noise propulsion system is to identify and characterize the noise sources. In general, a propulsion system consists of one or more prime movers (gas turbines, steam turbines, electric motors, diesel engines), reduction gears, and isolation systems; a ship foundation; and various auxiliary systems. The noise generated by the propulsion system includes contributions from all of these components. Table 1 (page 40) presents a list of the typical noise sources associated with the principle propulsion system components and identifies general approaches to control these sources. Note that the mounting system (isolation system plus ship foundation) is a control mechanism for all propulsion system noise sources.




Pod Propulsion History

1996..Not A Vintage Year In Dry Bulk Markets Not A Vintage Year In Dry Bulk Markets
A happy coupling
Alaska Marine Highway Finds Dual Purpose Vessel Justifies Cost
Breaking thought!
Cenac Repowers Pushboats With Lugger
Diesel Engine Guide
Diesel-Electric Icebreaker, Rothelstein, Launched At Kvaerner's Helsinki Yard
Ferry Contract Dispute Settled By Legislature
Ferry Contract Dispute Settled By Legislature
Gas turbines power up European ferries
Geared for success
Hitachi Zosen Completes VLCC Tohzan
Hull Completed On Showboat Branson Belle Louisiana License
Innovation Links Modern Technology With Maritime Past
Kawasaki Jet Piercer Hayabusa Launched
Kvaerner Masa-Yards, Neste Convert Second Tanker For Arctic Traffic
MAN B&W Offers Presentation Brochure On Alpha Propulsion Systems
Marshall Branson Builds OSRV; Building Two Vessels For South Korea
Mermaid Podded Propulsion Installed
New Provisional Rules From LR
NNS Wins Contract To Design Ele<tri< Drive Motor For U.S. Navy
Orders & Innovation Drive Propulsion Gear Manufacturers
Peterson Builders Heads Development Of New Urban Commuter Ferry
Propulsion Equipment
Red Funnel Orders Two Voith-Schneider Ferries From Ferguson Shipbuilders, Port Glasgow
Siemens, MaK Cooperate With CCG For Faster Icebreaker Response
Trinity Delivers Second Cycloidal Tractor Tug; Launches Casino Boat
Vessel: Zirfaea Yard: Bodewes Volharding Delivery: 1993
Walter Machine Outfits Casino Vessels With Keel Coolers
Yards, Suppliers Bring High-Tech To The Table
 
rss feeds | archive | privacy | history | articles | contributors | top news | contact us | about us | copyright