Numerical Study of the Water-exit Process of Axisymmetric Vehicle under Irregular Waves
Aiming to study the wave effects on the water-exit process of aquatic-aerial vehicles,a hemispherical-head axisymmetric vehicle are simulated to exit through different irregular waves based on the P-M spectrum.Both kinetic and dynamic profiles of the vehicle are extracted.The results demonstrate that the normal force mainly originates from the asymmetric pressure distribution on the cylinder part of the vehicle,and the pitching moment from the asymmetry on the head and the tail.Concerning the horizontal displacement of the gravity center and the pitching angle,the magnitudes are entwined with the height difference between the crest and trough that the vehicle encounters,while the directions with the stage of the crest/trough transition.
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