A Simulation Method for Inflatable Floating of Underwater Vehicle

doi:10.3969/j.issn.1000-1093.2020.07.001

Abstract

Abstract: A multidisciplinary co-simulation method is proposed to study the influence of airbag deployment on the attitude and trajectory of underwater vehicle during the inflatable floating. A dynamic model of underwater airbag deployment is established, and the volume expansion curve is obtained based on the control volume algorithm. A hydrodynamic model that can simultaneously couple the six-degrees-of-freedom rigid body motion of vehicle and the local deformation of airbag is established under the condition that the volume expansion rate of airbag is equivalent. The calculation is carried out based on the Navier-Stokes equation. Through the simulation calculation, the refinement process of underwater vehicle's floating is obtained, and the resultant force component-time history curves and the attitude data of underwater vehicle during floating are obtained. The results show that the buoyancy of airbag can effectively make the vehicle float; during floating, the vehicle is subjected to a certain lateral force because of the asymmetry of the vortex structure, and it is in a ‘spiral' upward process when it floats; and the vehicle is subjected to the vertical force provided by the current. In order to speed up, the angle of attack of vehicle should be adjusted to be positive before it goes up. Key

Key words: underwatervehicle, floatingairbag, fluid-structureinteraction, dynamicmeshtechnique

CLC Number:

TJ630.2

ZHANG Xiaoguang， LI Bin， DANG Huixue， WEN Jinpeng， SUN Pan. A Simulation Method for Inflatable Floating of Underwater Vehicle[J]. Acta Armamentarii, 2020, 41(7): 1249-1261.

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第41卷第7期2020 年7月
兵工学报ACTA ARMAMENTARII
Vol.41No.7Jul.2020

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