Comparative Performance of Optimum High Speed SWATH and Semi-SWATH …
2015年11月4日 · The hydrodynamic performance of unconventional SWATH and Semi-SWATH for high speed applications are analyzed and compared in this paper. Bare hull resistance in calm water is estimated by an inviscid boundary element method with viscous corrections and verified by a fully turbulent, multiphase unsteady RANSE solver.
The ultra-high speed SWATH with hydrofoil design establishes two modes of operation. At slower speeds, less than 20 knots, the vessel travels in displacement mode, where the SWATH design takes advantage. As the vessel moves into the higher speed regime, hydrodynamic forces take over and the vessel begins to
s.w.a.t.h - Boat Design Net
2002年12月21日 · Since the wave encounter frequency increases with speed, SWATH hullforms are good for high speed because they become less sensitive to chop. The small waterplane area also means that the craft will experience a large change in immersion with a comparatively modest change in displacement.
S.W.A.T.H. — Mechanized Monsters
Notable high speed SWATH ship examples include the Juliet Marine GHOST, the Sea Shadow, and the HSV Sea Slice. ADVANTAGES: High-speed, low drag, very low draft (ideal for littoral operation.) Very stable in “flight,” offering a similarly smooth ride as a hydrofoil.
Numerical investigation on the hydrodynamic performance of fast …
2017年2月1日 · In this framework, we present a study on the interference effects generated by canted struts in SWATH vessels designed to achieve best resistance performance at medium to high Froude numbers. The effect of the struts on optimum drag is …
Design and assessment of a super high speed, hybrid hydrofoil/SWATH ...
This thesis presents the preliminary design and assessment of Wavecutter, an innovative super high speed, hybrid hydrofoil/SWATH crew boat. The intended mission of the vessel is the very-fast transportation of crew and cargo, to and from offshore installations.
Hydrodynamic optimization of a high-speed vessel by means of …
5 天之前 · This study introduces a methodology for multi-objective optimization of a high-speed vessel. The introduced methodology was put into practical application on benchmark form Model 5365, a 1/8.25 scaled representation of R/V Athena. The methodology combines fully parametric model generation, Reynolds-averaged Navier–Stokes (RANS) based resistance estimation, Strip Theory based seakeeping ...
Multi-Fidelity Optimization of High Speed SWATHs
2016年11月1日 · Resistance in calm water is investigated for a SWATH hull in the multi-dimensional design space using a new method to derive a high quality response surface through Bayesean inference and machine learning techniques based on a low number of high-fidelity computations and a larger number of less-expensive low fidelity computations.
–Low-fidelity numerical 2D FEA applied to the concept ultra-high-speed Unmanned Surface Vehicle (USV) Hybrid Hydrofoil SWATH (HY2-SWATH) –Conduct preliminary design space exploration •Varying material, structural member dimensions, and structural member count •Demonstrate capability for module incorporation in global software manager
GHOST is a reconfigurable high-speed small waterplane area twin hull (SWATH) vessel that delivers significant advantages over alterna-tive vessels in this size class (35-45 feet length overall). • Inherent shock avoidance for reduced personnel injury/fatigue and improved mission performance • Shallow draft for coastal operations