... artificial intelligence optimization problem weight reduction norfolk riccardo pellegrini pareto optimization mf fsi optimization surrogate model design space machine learning hssc pb 2024 evaluation design variable stern hull With the aim of improving standard and often too...

... For more than a century, displacement ships have been able to exceed “hull speed,” the natural speed of a wave the same length as the ship, or a Froude number based on length of 0.40. That ability evolved in a time frame approximately corresponding to the American Civil War or slightly...

... Determination of forces acting on planing hulls in maneuvering has been turned into an interesting problem during the last decade. Different methods, based on mathematical or empirical approaches, are elicited in order to compute hydrodynamic forces and moments acting on the boat in different...

... aluminum boat curvature united states government knowledge management chine strength marine engineer information stiffener law enforcement north america government hull designer software society geology contract plane artificial intelligence aluminum boat naval architect algorithm...

... the model at constant speed, regardless of oscillating slamming loads, and allow the model to move only in heave and pitch. Typically in a planing hull seakeeping test the model is fixed in surge, i.e. restrained from moving backwards and forwards relative to the towing carriage. By contrast, planing boats...

... will explain the methodology for separating impacts in regular waves as well as the scaling relationships for peak acceleration magnitudes and full acceleration impact time histories. wavelength hull hull geometry magnitude fridsma united states government experiment geometry united states naval...

... This paper intends to to prove that a properly designed swept back Stepped, Cambered Planing Hull with Hydrofoils (SCPH2) can reduce the drag of the conventional reference planing hull by a considerable amount (30 percent in model scale). Taking hull 5631 of the USCG systematic series...

... is compounded by the lack of railings, lifelines, or well-defined seating on these boats to prevent ejection. united states government boat dynamic instability hull propeller tunnel figure 17 outboard engine operator codega intermittent controllability marine transportation morabito...

... Papers presented in recent FAST conferences and prior reports by CISD (the US Navy's Center for Innovation in Ship Design) have made available interesting information of a new hull type denominated “Wedge”. A statement in the latest such paper presented at FAST 2015 by L. Wang et al (Ref. 1...

... The hard chine, deep-vee hull form has been used in a wide variety of commercial and naval applications for a number of years. The hull form offers advantages in stability, speed, and wide beam for large cockpit areas. There are also several disadvantages associated with the hull form, most...

... of the changes in hydrodynamic forces and moments acting on hull due to the interaction with the lower-hull of the outboard engine and its propeller, as well as the effective wake fraction and the relative rotative efficiency, is presented. Based on the experimental results, an estimation method is proposed...

... The hydrodynamic lift, wetted area and center of pressure of a constant beam, warped bottom planing surface were obtained experimentally for a model having a 3 deg./beam increase of deadrise from 10 deg. at the transom to 30 deg at the stem (typical for the planing area of a warped hull). Towing...

... A surplus U.S. Coast Guard 26 foot Motor Surf Boat (MSB) was purchased and outfitted for use as a pleasure craft. This boat had been previously repowered by the Coast Guard and is capable of considerably higher speeds than the original design. The hull form has curved buttocks aft and a rounded...

... monohull craft with hull length below 30m, developed by Albatross Marine Design. Dimensions of hull are defined from usable areas and essential volumes, with recommendations provided for different architectural types of boats. Equations are proposed for weight groups based on hull dimensions, horsepower...

... An experimental program at the United States Naval Academy has been designed to investigate the transverse plane stability of planing hulls. An experimental mechanism to force a planing hull model in roll motion was designed and built. The first model tested was a wooden prismatic planing hull...

... pressures during the slamming event. The second part examines NFA’s ability to match sinkage, trim and resistance from experiments performed on constant deadrise planing hulls, detailed in Fridsma (1969). Simulations were preformed on two 20 degree deadrise hullforms of varying length to beam ratios (4...

... Tunnel hull boats, capable of achieving speeds up to 150 knots, are among the fastest waterborne vehicles. A tunnel hull configuration consists of a platform and two side hulls. The weight of this craft is supported mainly by hydrodynamic forces on the hulls and aerodynamic force on the platform...

... torque thrust gearcase hull deg 0 Chesapeake Power Boat Symposium 2010 19-20, March, St. John's College, Annapolis, Maryland Copyright © 2010 Society of Naval Architects and Marine Engineers (SNAME) www.sname.org THE SECOND CHESAPEAKE POWER BOAT SYMPOSIUM ANNAPOLIS, MARYLAND, MARCH 2010 Use...

... A typical NURBS hull model involves far more control points than are needed for the design process, which needlessly complicates fairing and form finding. A relatively new surface representation called T-splines eliminates the superfluous rows and columns of control points that are unavoidable...

... bass frequency information united states government injury exposure spinal injury average wave period significant wave height hull notional polar plot knot guidance schleicher requirement international organization conference Chesapeake Power Boat Symposium 2010 19-20, March, St...