Analysis on the influence of center of gravity layout and drift angle on the longitudinal stability of airdrop hovercraft
To analyze the longitudinal motion response of airdrop hovercraft at different center of gravity positions and drift angles,the hydrodynamic performance of hovercraft in regular waves was simulated numerically by using the overlapping grid technology of STAR-CCM + platform.The study shows that the change of the center of gravity and drift angle is very sensitive to the influence of resistance performance and navigation stability of the cushion in the test.At 0.4<Fr<0.8,the resistance of the vertical and vertical position will increase in the Fr>0.8,the center of gravity longitudinal position forward and vertical position down will lead to reduce the resistance,so the center of gravity position arrangement should be moved appropriately,the center of gravity position should be moved appropriately forward.In the range of 0°<β<30°,the smaller the drift angle,the more obvious the hovercraft is stimulated by the waves,and the greater the longitudinal motion response amplitude.The optimization of the center of gravity layout scheme and the drift angle can effectively improve the navigation stability of the hovercraft.Comprehensive analysis shows that the higher the longitudinal stability of the hovercraft and the best resistance performance at the drift angle at a certain small angle.
airdrop hovercraftoverlapping gridcenter of gravity positiondrift anglelongitudinal sta-bility
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