Numerical simulation of righting process for damaged-capsized hull

PAN De-wei; LIN Cheng-xin; ZHOU Zhao-xin; SUN Yu-qiang; LIU Zhi-jie

Volume 17 Issue 5

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PAN De-wei, LIN Cheng-xin, ZHOU Zhao-xin, SUN Yu-qiang, LIU Zhi-jie. Numerical simulation of righting process for damaged-capsized hull[J]. Journal of Traffic and Transportation Engineering, 2017, 17(5): 102-112.

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PAN De-wei, LIN Cheng-xin, ZHOU Zhao-xin, SUN Yu-qiang, LIU Zhi-jie. Numerical simulation of righting process for damaged-capsized hull[J]. Journal of Traffic and Transportation Engineering, 2017, 17(5): 102-112.

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Numerical simulation of righting process for damaged-capsized hull

1.
Navigation College, Shandong Jiaotong University, Weihai 264209, Shandong, China
2.
Transportation Equipment and Ocean Engineering College, Dalian Maritime University, Dalian 116026, Liaoning, China

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Author Bio:
PANDe-wei(1986-), male, lecturer, PhD, wssrwsmt@163.com
Corresponding author: LIN Cheng-xin(1963-), male, professor, PhD, lch_xin@126.com
Received Date: 2017-06-10
Publish Date: 2017-10-25

Abstract

Abstract

The buoyancy and stability of damaged-capsized hull were considered, and the spatial position and mechanical of hull state were studied during righting process.The spatial mechanical equilibrium equation of hull was established by Euler rotation transformation method.The stability and righting mathematical model of hull were derived by using the hydrostatical theory of ship.The flooding quantity was calculated according to Bernoulli theorem and its impact on the positions of barycenter and buoyant centre were obtained.The righting process of damagedcapsized hull was simulated by using General HydroStatics (GHS) software, the maximum righting force and flooding quantity were solved, and the shear force, bending moment, torque of six longitudinal positions along the hull were calculated.Computation result shows that the righting moment of damaged-capsized hull decreases by 130.312 MN·m in the early righting process because water floods damaged cabins.So, the flooding water decreases the stability ofdamaged-capsized hull and the righting force, which results in the decrease of righting difficulty.In the later righting process, the maximum tilting moment of damaged-capsized hull is163.594 MN·m because water floods damaged cabins.Thus, flooding water decreases the stability of hull, increases the righting difficulty, and the larger righting force is needed to balance the hull.The longitudinal strength distribution of hull changes in response to the righting force and flooding quantity.The maximum force and torque of multi-point righting are less than40% and 50% of the corresponding values of single-point righting, respectively.The maximum flooding quantities in Schemes 1-4 are 6 269.76, 6 781.01, 5 830.76 and 6 653.33 t, respectively, which shows that the flooding quantities of single-point righting (Schemes 1-3) are less than the flooding quantity of multi-point righting (Scheme 4) through reaonably arranging the positions of righting points.
- ship engineering,
- wreck salvage,
- capsized hull,
- righting scheme,
- righting force,
- GHS

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References(33)

References

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