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Proceedings Papers

Paper presented at the SNAME 30th American Towing Tank Conference, October 4, 2017
Paper Number: SNAME-ATTC-2017-0026
... artificially higher peak acceleration values (Riley, et.al, 2010). In full scale hulls, vibrations from the propulsors are telegraphed through the hull structure to the accelerometer. In towing tank models vibrations from the carriage are transmitted by the tow post through the hull and to the accelerometer...
Proceedings Papers

Paper presented at the SNAME 30th American Towing Tank Conference, October 4, 2017
Paper Number: SNAME-ATTC-2017-0029
... seaway trench spatial variability secondary objective basin sensor confidence interval machine learning ultrasonic sensor threshold wave case artificial intelligence time series primary objective significant wave height paddle objective standalone array modal period carriage...
Proceedings Papers

Paper presented at the SNAME 30th American Towing Tank Conference, October 4, 2017
Paper Number: SNAME-ATTC-2017-0030
... carriage ocean engineering laboratory advanced structure carriage american towing tank conference THE 30th AMERICAN TOWING TANK CONFERENCE WEST BETHESDA, MARYLAND, OCTOBER 2017 Development of a New Federally Funded Wind/Wave/Towing Basin to Support the Offshore Renewable Energy Industry Alexander...
Proceedings Papers

Paper presented at the SNAME 29th American Towing Tank Conference, August 11–13, 2010
Paper Number: SNAME-ATTC-2010-022
... placed about 7.5 m apart) moving horizontally at full-scale ship speeds in a large water tank. metals & mining carriage experiment air entrainment water surface ship speed light sheet intersection droplet wave maker tank wave board wave tank turbulence steel mining full-scale...
Proceedings Papers

Paper presented at the SNAME 29th American Towing Tank Conference, August 11–13, 2010
Paper Number: SNAME-ATTC-2010-029
... carriage speed, propeller speed and the transient forces/moments acting on the propeller. inclination angle ocean engineering olofsson cavity spp carriage test apparatus diameter upstream oil & gas surface piercing propeller immersion ratio experiment american towing tank conference...
Proceedings Papers

Paper presented at the SNAME 29th American Towing Tank Conference, August 11–13, 2010
Paper Number: SNAME-ATTC-2010-023
... combinations of all three motions. Basic theory and details of the concept design, detailed design, construction considerations, and control software as well as experimental uses and considerations for future improvements are presented and discussed. motion card amplitude carriage surface warfare...
Proceedings Papers

Paper presented at the SNAME 29th American Towing Tank Conference, August 11–13, 2010
Paper Number: SNAME-ATTC-2010-024
... is discussed and education and research activities are summarized. Further details are recorded in the Appendices that are available as a companion CD to the printed proceedings of this conference. north america government hydromechanic laboratory tank carriage united states government annapolis...
Proceedings Papers

Paper presented at the SNAME 28th American Towing Tank Conference, August 8–10, 2007
Paper Number: SNAME-ATTC-2007-001
... note, the NAHL is now in much better condition than it was before Isabel. tank foot tank carriage controller flood line united states government control system wavemaker north america government hydromechanic laboratory research project calibration check academy hydromechanic...
Proceedings Papers

Paper presented at the SNAME 28th American Towing Tank Conference, August 8–10, 2007
Paper Number: SNAME-ATTC-2007-006
... of hardware and software for calibration, data collection and analysis. The intention of the PIV system designers was to collect as many data frames as possible for a fixed measurement plane location, relative to the model. This required the PIV system to be fixed on the towing carriage, moving with the model...
Proceedings Papers

Paper presented at the SNAME 26th American Towing Tank Conference, July 23–24, 2001
Paper Number: SNAME-ATTC-2001-023
... drag reduction surface effect ship model north america government production control microbubble drag reduction air cushion carriage slender monohull model test langley seawater tow tank flow rate froude number drag reduction system Microbubble Drag Reduction on a Surface Effect Ship...
Proceedings Papers

Paper presented at the SNAME 26th American Towing Tank Conference, July 23–24, 2001
Paper Number: SNAME-ATTC-2001-018
... tank deceleration basin mechanical dynamometer average value carriage resistance robinson model basin pulley arrangement upgrade old basin The Future of Webb's Towing Tank R.W. Van Hooff, N.J. Gallagher, and R.H. Compton 26th ATTC, July 2001 Introduction Webb Institute is one of the few...
Proceedings Papers

Paper presented at the SNAME 25th American Towing Tank Conference, October 24–25, 1998
Paper Number: SNAME-ATTC-1998-002
.... The towing staff is attached to the towing carriage in such a way that the system allows the ship to heave and pitch about the attachment point on the ship, but restrains its motion in the transverse direction. The aft end of the ship model is sometimes provided with a guide system for the side restraint...
Proceedings Papers

Paper presented at the SNAME 25th American Towing Tank Conference, October 24–25, 1998
Paper Number: SNAME-ATTC-1998-027
... microns and has a salinity about half that of seawater. The carriage is powered by eight 75 hp D.C. motors with trolley style cables and can attain speeds of up to 40 knots. Power is generated by a 850 kW motor generator. Several struts exist for model towing and the carriage bas 110/120 V.A.C. and 3...
Proceedings Papers

Paper presented at the SNAME 25th American Towing Tank Conference, October 24–25, 1998
Paper Number: SNAME-ATTC-1998-031
... by a berthing ship. Validating experiments were conducted in a shallow water basin. A model barge was drawn transversely through calm water by a towing carriage toward a solid, vertical quay wall in a manner similar to a regular berthing process. The transier.t water flow induced by the moving barge...
Proceedings Papers

Paper presented at the SNAME 24th American Towing Tank Conference, November 2–3, 1995
Paper Number: SNAME-ATTC-1995-014
... This report describes the development and implementation of a procedure to repair the surface of the support track for a hydrodynamic test carriage at the Naval Surface Warfare Center's, Bethesda, Maryland ship-model towing basin. About 50 years of use had caused localized wear at the track...
Proceedings Papers

Paper presented at the SNAME 24th American Towing Tank Conference, November 2–3, 1995
Paper Number: SNAME-ATTC-1995-040
... rolled maneuvering experiment naval surface warfare center photograph zigzag maneuver nswccd outixx antenna carriage gyroscope maneuver barge maneuvering experiment radio-coni taylor model basin division experiment rossignol naval surface warfare center david taylor model basin...
Proceedings Papers

Paper presented at the SNAME 24th American Towing Tank Conference, November 2–3, 1995
Paper Number: SNAME-ATTC-1995-027
... united states government shaughnessy academy hydromechanic laboratory tank carriage calm water planing boat resistance transom savitsky condition 1 condition 2 north america government zseleczky mylar daniel savitsky repeatability testing technique naval academy hydrodynamic...
Proceedings Papers

Paper presented at the SNAME 23rd American Towing Tank Conference, June 11–12, 1992
Paper Number: SNAME-ATTC-1992-037
... This paper explains the capabilities of a new right angle drive propeller dynamometry system which has recently been put into service at the Carderock Division of the Naval Surface Warfare Center (CDNSWC). The towing carriage mounted Fully Submerged Propulsor Dynamometer (FSPD) was designed...
Proceedings Papers

Paper presented at the SNAME 22nd American Towing Tank Conference, August 8–11, 1989
Paper Number: SNAME-ATTC-1989-029
... by fluctuating the fan speeds. Currents were produced in the tank using two rows of nozzles positioned one above the other below the still water surface. Two submersible pumps supported from the main carriage approximately 23 m from the nozzles were used to set up a surface current. The vessel was subjected...
Proceedings Papers

Paper presented at the SNAME 22nd American Towing Tank Conference, August 8–11, 1989
Paper Number: SNAME-ATTC-1989-012
... base approach arc thrustline matrix method accuracy gravity heave carriage configuration iteration program planing craff resistance model experiment avg A MATRIX DATA BASE APPROACH TO PLANING CRAFf RESISTANCE MODEL EXPERIMENTS JohnG. Hoyt m, Martin J. Dipper David Taylor Rcscarch Center...

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