Effects of Front-Side Angles of Floating Boxes on the Navigation Performance of an Amphibious Vehicle in Calm Water

ZHANG Zhewei; XU Xiaojun; FENG Yikun; ZHANG Guoqing; JIN Haobin; GE Qiqian; WANG Jiancheng; ZHANG Xin

doi:10.11993/j.issn.2096-3920.2026-0092

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Article Navigation > Journal of Unmanned Undersea Systems > 2026 > Accepted Manuscript

ZHANG Zhewei, XU Xiaojun, FENG Yikun, ZHANG Guoqing, JIN Haobin, GE Qiqian, WANG Jiancheng, ZHANG Xin. Effects of Front-Side Angles of Floating Boxes on the Navigation Performance of an Amphibious Vehicle in Calm Water[J]. Journal of Unmanned Undersea Systems. doi: 10.11993/j.issn.2096-3920.2026-0092

Citation:

ZHANG Zhewei, XU Xiaojun, FENG Yikun, ZHANG Guoqing, JIN Haobin, GE Qiqian, WANG Jiancheng, ZHANG Xin. Effects of Front-Side Angles of Floating Boxes on the Navigation Performance of an Amphibious Vehicle in Calm Water[J]. Journal of Unmanned Undersea Systems. doi: 10.11993/j.issn.2096-3920.2026-0092

Citation:

ZHANG Zhewei, XU Xiaojun, FENG Yikun, ZHANG Guoqing, JIN Haobin, GE Qiqian, WANG Jiancheng, ZHANG Xin. Effects of Front-Side Angles of Floating Boxes on the Navigation Performance of an Amphibious Vehicle in Calm Water[J]. Journal of Unmanned Undersea Systems. doi: 10.11993/j.issn.2096-3920.2026-0092

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Effects of Front-Side Angles of Floating Boxes on the Navigation Performance of an Amphibious Vehicle in Calm Water

doi: 10.11993/j.issn.2096-3920.2026-0092

ZHANG Zhewei^{1, 2},
XU Xiaojun^{1, 2},
FENG Yikun^{1, 2
,},
ZHANG Guoqing^{1, 2},
JIN Haobin^{1, 2},
GE Qiqian^{1, 2},
WANG Jiancheng^{1, 2},
ZHANG Xin^{1, 2}

1.
College of Intelligence Science and Technology, National University of Defense Technology, Changsha 410073, China
2.
National Key Laboratory of Equipment State Sensing and Smart Support, National University of Defense Technology, Changsha 410073, China

Received Date: 2026-05-13
Accepted Date: 2026-06-15
Rev Recd Date: 2026-06-11

Available Online: 2026-09-11

Abstract

Abstract

To clarify the effects of the front-side angles of floating boxes on the resistance, attitude response, and local flow field of an amphibious vehicle in calm water, a specific amphibious vehicle was investigated based on the Reynolds-Averaged Navier–Stokes(RANS) equations. Within the framework of computational fluid dynamics(CFD), the shear stress transport(SST) k-ω turbulence model and the volume of fluid (VOF) free-surface model were employed to analyze the hydrodynamic effects of the front-side geometric angles of the floating boxes. By varying the front inclined angle α₁ and the outer guide-surface angle α₂, the resistance, pitch, heave, free-surface patterns, and pressure distributions were comparatively analyzed at a fixed displacement condition and a speed of 6m·s⁻¹. Towing-tank experiments were also conducted to validate the numerical method. The results show that, within the parameter ranges investigated, as α₁ increases from 15° to 35°, the normalized resistance R/∇ increases from 2.509 to 2.690, corresponding to an increase of approximately 7.2%. At larger α₁, the high-pressure region near the leading part of the floating box expands, accompanied by intensified free-surface disturbance and wave-making effects. The pitch angle first decreases slightly and then gradually increases, whereas the heave displacement first decreases and subsequently exhibits small fluctuations. Among the discrete cases investigated, the minimum heave displacement of 0.009 529 m occurs at α₁=25°, where R/∇ is 2.542, approximately 1.3% higher than that at α₁=15°, and the pitch angle is 4.255°. Therefore, the favorable values of α₁ differ among individual hydrodynamic performance indices, and an overall optimum cannot be identified without an explicitly defined multi-objective evaluation criterion. In comparison, variations in α₂ produce a smaller resistance response. At α₂=30°, R/∇ reaches the maximum value of 2.650 among the investigated cases, accompanied by relatively strong transverse-wave interference. The results indicate that the front-side angles of the floating boxes affect navigation resistance through changes in local pressure distribution, vehicle attitude response, and free-surface wave patterns, providing a reference for the selection and further optimization of the front-side geometric parameters of the floating boxes for the vehicle investigated in this study.
- amphibious vehicle,
- front-side angles of floating boxes,
- attitude response,
- resistance,
- computational fluid dynamics,
- free-surface waves

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References(17)

References

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