Volume 22 Issue 2
Apr.  2022
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Article Navigation >  Journal of Traffic and Transportation Engineering  > 2022  >  22(2): 233-245
QIU Shao-yang, REN Hong-xiang, ZHANG Xiu-feng, WANG De-long, SUN Jian, XIAO Fang-bing. Modeling and simulation of rescue boat's launching from a ship[J]. Journal of Traffic and Transportation Engineering, 2022, 22(2): 233-245. doi: 10.19818/j.cnki.1671-1637.2022.02.018
Citation: QIU Shao-yang, REN Hong-xiang, ZHANG Xiu-feng, WANG De-long, SUN Jian, XIAO Fang-bing. Modeling and simulation of rescue boat's launching from a ship[J]. Journal of Traffic and Transportation Engineering, 2022, 22(2): 233-245. doi: 10.19818/j.cnki.1671-1637.2022.02.018
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Modeling and simulation of rescue boat's launching from a ship

doi: 10.19818/j.cnki.1671-1637.2022.02.018
  • 1.

    Navigation College, Dalian Maritime University, Dalian 116026, Liaoning, China

  • 2.

    College of Artificial Intelligence, Dalian Maritime University, Dalian 116026, Liaoning, China

Funds:

National Natural Science Foundation of China 52071312

Natural Science Foundation of Liaoning Province 2020-HYLH-29

Provincial Postgraduate Education and Teaching Achievement Award Cultivation Project YJG2020601

More Information
  • Author Bio:

    QIU Shao-yang(1992-), male, doctoral student, 799509823@qq.com

    REN Hong-xiang(1974-), male, professor, PhD, dmu_rhx@163.com

  • Received Date: 2021-10-26
  • Publish Date: 2022-04-25
    Abstract
  • The model of rescue boat launching was built by using the Kane's method, and the coupled motion of the rescue boat, flexible boom, sling, and ship was considered. The boom model was constructed by using the lumped mass method, and the internal force of the boom was calculated by the elastic strain energy function and dissipation function. The collision between the rescue boat and the ship was divided into the phases of compression and restitution, and the collision force was calculated according to the Hertz contact theory and the contact force model of permanent indentations separately. The boom model was compared with the model based on the Bernoulli-Euler beam theory, and the boom's profiles were almost the same in a steady state. The model of rescue boat launching was compared with the existing method, and the simulation experiment of rescue boat launching and error analysis of rescue boat trajectories in horizontal and vertical directions were carried out under the cross wave. Analysis results show that at a wave height of 3 m and a wavelength of 245 m, the average absolute errors of the proposed method are 0.11 and 0.12 m, respectively, and 0.54 and 0.34 m with the existing method. At a wave height of 2 m and a wavelength of 60 m, the average absolute errors of the proposed method are 0.09 and 0.14 m, respectively, and 1.72 and 0.31 m with the existing method. The average absolute errors of the proposed method are lower than those of existing method. Thus, the proposed method improves the calculation accuracy of the rescue boat's launching under the cross wave. Compared with the results of the collision experiment, the relative errors of horizontal and vertical acceleration peaks are about 0.5% and 60.0%, respectively, and as the horizontal acceleration peak is highly accurate, the model of rescue boat launching can assist the analysis of the collision experiment. On the basis of the model of rescue boat launching, the minimum initial distance between the rescue boat and the ship's side is 2.0 times the width of the boat in sea state 4 and 2.5 times the width of the boat in sea state 5 to avoid collision under the cross wave. 4 tabs, 22 figs, 27 refs.

     

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