PAN De-wei, LIN Cheng-xin, SUN De-ping, ZHOU Chao-yu. Calculation method of grounding ship during righting process[J]. Journal of Traffic and Transportation Engineering, 2014, 14(4): 53-63.
Citation: PAN De-wei, LIN Cheng-xin, SUN De-ping, ZHOU Chao-yu. Calculation method of grounding ship during righting process[J]. Journal of Traffic and Transportation Engineering, 2014, 14(4): 53-63.

Calculation method of grounding ship during righting process

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  • Author Bio:

    PAN De-wei(1986-), male, doctoral student, +86-411-84724292, wssrwsmt@163.com

    LIN Cheng-xin(1963-), male, professor, PhD, +86-411-84724292, Ich_xin@126.com

  • Received Date: 2014-02-13
  • Publish Date: 2014-08-25
  • In order to study the salvage of grounding ship, the changes of grounding force and trim angle during righting process were computed.The function of free surface in cabins during righting process was analyzed.The force module of grounding ship was established based on the stress characteristics of grounding ship.Considering the shortcomings of traditional calculation method of grounding force, taking an grounding ship as an example, the grounding force of every grounding point, total grounding force, heel angle and trim angle were calculated during righting process simulated by GHS software.The righting processes of ship with different grounding states were compared through simulation, and the effects of the positions of grounding point, draft, shiplines and weight distribution on the force and attitude of grounding ship were analyzed.Analysis result indicates that for grounding ship with dispersion of grounding point or deep draft, the variation of trim angle is relatively smaller, and is 0.1%-2.0%of that of other situation.The variations of total grounding forces for grounding points which are dissymmetrical about midship are smaller than the variations that the points are symmetric about midship, and the variations of the formers are 35%-65%of the laters.The influence of free surface add more difficulties to wreck salvage, and so it should be emphatically considered in making salvage scheme.The overturn speed of wreck in the project should be controlled in order to avoid blocking of righting progress or further damage to ships.

     

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