Journal of the Korea Institute of Military Science and Technology (한국군사과학기술학회지)

The Korea Institute of Military Science and Technology (한국군사과학기술학회)
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Numerical Analysis on Dynamic Behavior Characteristics of an Amphibious Assault Vehicle during Water Entry

상륙돌격장갑차의 진수 중 동적 거동 수치 해석

  • Youngmin Heo (Ground Technology Research Institute, Agency for Defense Development) ;
  • Taehyung Kim (Ground Technology Research Institute, Agency for Defense Development)
  • 허영민 (국방과학연구소 지상기술연구원) ;
  • 김태형 (국방과학연구소 지상기술연구원)
  • Received : 2022.12.06
  • Accepted : 2023.03.02
  • Published : 2023.04.05
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Abstract

In the present study, the dynamic behavior characteristics of an amphibious assault vehicle during water entry were analyzed using STAR-CCM+, a commercial computational fluid dynamics(CFD) code. All computations were performed using an overset mesh system and a RANS based flow-solver coupled with dynamic fluid-body interaction(DFBI) solver for simulating three degrees of freedom motion. For numerical validation of the solver, a water entry simulation of inclined circular cylinder was conducted and it was compared between an existing experiment data and CFD results. The pitch angle variation and the trajectory of the circular cylinder during water entry shows good agreement with previous experimental and numerical studies. For the water entry simulations of the amphibious assault vehicle, the analysis of dynamic behaviors of the amphibious assault vehicle with different slope angles, submerged depths and initial velocities were conducted. It is confirmed that the steep slope angle increases the submerged volume of the amphibious assault vehicle, so the buoyancy acting on the vehicle is increased and the moved distance for the re-flotation is decreased. It is also revealed that the submerged volume is increased, bow-up phenomenon occur earlier.

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References

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