Research on the submarine floating movement in waves involving the water holes

Wei, Keke; Gao, Xiaopeng; Liu, Dongyu; Wei, Fei; Luo, Peng

doi:10.1016/j.oceaneng.2022.111326

Cited by 2 publications

(2 citation statements)

References 13 publications

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“…Copyright© Bin Z and Zijie M. used to locate the submarine as the traveller, with the initial deployment point as the station, and instead of a number of discrete points of a continuous path as the cities, we design a shortest path from the station through all the cities and then back to the station for the traveller, and get the search device in the A simplified model of efficient search within a high probability region [15][16][17][18][19][20][21][22][23][24].…”

Section: A1 A2 A3mentioning

confidence: 99%

Biostatistical Analysis on Submarine Lost Contact Search Technology

2024

OAJDA

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In this paper, a technical solution based on ArcGIS and genetic algorithm is proposed for searching submarine after losing contact. First, a three-dimensional submarine terrain model is established by ArcGIS to simulate the Marine environment where the submarine may lose contact. Then, the Cartesian coordinate system is established, and the random walk model is used to describe the motion state of the submarine after the loss of contact. The probabilistic model is optimized by Bayesian inference to improve the accuracy of submarine position prediction. After determining the search area, genetic algorithm is used to optimize the search path so that the search equipment can locate the submarine and return to the initial point as soon as possible. The results show that this method can effectively predict the position of the submarine after the loss of contact, and provide an efficient search path for the search equipment, and provide technical support for the search and rescue of the submarine after the loss of contact.

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Section: A1 A2 A3mentioning

confidence: 99%

Biostatistical Analysis on Submarine Lost Contact Search Technology

2024

OAJDA

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“…The use of the RANS method in this case may not be able to capture the unsteady disturbances present during submarine surfacing, potentially leading to deviations from accurate results. Although researchers such as Zhou et al [17], Wei et al [6,18], and Zhang et al [19] have conducted relevant simulation studies on submarine surfacing maneuvers using the RANS method and achieved commendable results, this is probably due to the relatively shallow submersion depth, because the flow separation is not fully developed during underwater submarine motion and therefore affects the computational results less.…”

Section: Introductionmentioning

confidence: 99%

A Study on the Influence of Unsteady Forces on the Roll Characteristics of a Submarine during Free Ascent from Great Depth

Xiang,

Ou,

Chen

et al. 2024

JMSE

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The maximum diving depth of modern submarines has always been increasing. Although this has been useful and in some cases necessary, it usually comes with some risks. For instance, when a submarine encounters an emergency situation that requires immediate ascent from great depths, the situation becomes more dangerous, especially due to its rolling characteristics. To investigate the effect of unsteady forces during free ascent motion of submarines at great depths on submarine rolling, in this study, the SST-DDES model combined with the overset grid technique was used for the numerical simulation of a submarine free ascent. Water tank experiments for free ascent were conducted to validate the numerical approach, which confirmed the reliability of the numerical method. Following this, the CFD method was employed to conduct an initial exploratory investigation into the free ascent motion of deep-submergence submarines. The free ascent motion of submarines at great depths under five different degrees of freedom combinations was studied. The computational results indicated that submarines are more prone to roll over during free ascent at great depths. At a depth six times the length of the submarine, the maximum roll angle underwater reaches 22.8°. In addition, unsteady rolling moments, lateral forces, and yawing moments have a significant effect on submarine rolling, intensifying the tendency to roll. Furthermore, it was observed that the vertical hydrodynamic attack angle β is related to the rolling stability of the submarine, such that a moderate decrease in β is beneficial for the rolling stability. The numerical calculation method and preliminary research findings can provide theoretical support for controlling the ascent motion of real submarines.

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Research on the submarine floating movement in waves involving the water holes

Cited by 2 publications

References 13 publications

Biostatistical Analysis on Submarine Lost Contact Search Technology

Biostatistical Analysis on Submarine Lost Contact Search Technology

A Study on the Influence of Unsteady Forces on the Roll Characteristics of a Submarine during Free Ascent from Great Depth

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