Research On The Hydrodynamic Performance Of The Air Cushion Assisted Catamaran

The air cushion assisted catamaran (ACAC) is a new hybrid ship, which isdifferent from the air cushion vehicle and the sidewall hovercraft. Combining manyadvantages of the ordinary catamaran, hovercraft, and the planing craft, it not only hassome virtues such as a shallow draft, high sea-keeping, and wide deck, but hasexcellent ability to climb peaks, having a good acceleration performance and excellentlongitudinal stability. Based on this, more and more countries begin to study on it.This paper, based on a certain landing craft projects, calculates to promote thebalance of power and pad-liter power after meeting the mission statement, theintroduction of a linear regression analysis, and optimizes the ship form of ACACbased on MATLAB preliminarily.And then, choosing the hydrodynamic calculation software STAR-CCM+whosemesh form is polyhedral core volume based on the N-S equation, it mainly calculatesthe sailing program of different ship types in calm water, including recordingwaveform change indoor, and studys main ship elements of affecting sailingperformance of ACAC preliminarily, providing the necessary reference for the nextship model test and ship improvements with the calculated data.The last, after study the conventional ship model testing and combining withthe characteristics of ACAC, it designs a test method which applies to the ship, andgets ship model hydrodynamic performance test in the high-speed water power poolof the605Institute of AVIC; the ship model experiment tests the three different shipforms’ pilot program validation, and gets certain modified under the test conditionsfor achieving better navigation; the three ships partly do model hydrostatic resistancetest and trim rules wave test, recording the waveform changes and pressure changesunder different conditions indoors, and explore elements of which impact sailingperformance of ACAC by methods such as changing the inflatable flow, the positionof the center of gravity to, discharge height and so on, obtaining lots of valuable testdata which provides reliable supports for deeper study in the next step.