|Table of Contents|

Uprighting process analysis of big-angle tilted aground ship(PDF)

《交通运输工程学报》[ISSN:1671-1637/CN:61-1369/U]

Issue:
2015年02期
Page:
50-58
Research Field:
载运工具运用工程
Publishing date:

Info

Title:
Uprighting process analysis of big-angle tilted aground ship
Author(s):
PAN De-wei1;  LIN Cheng-xin1;  SUN De-ping2;  LIU Zhi-jie1;  ZHOU Chao-yu1
1. School of Transportation Equipment and Ocean Engineering, Dalian Maritime University, Dalian 116026, Liaoning, China; 2. School of Marine Engineering, Dalian Maritime University, Dalian 116026, Liaoning, China
Keywords:
ship engineering;  wreck salvage;  big-angle tilted aground ship;  uprighting scheme;  uprighting force;  aground force;  GHS software
PACS:
U676.62
DOI:
-
Abstract:
In order to study the uprighting process of big-angle tilted aground ship, the uprighting force, heel angle and draft of the ship were computed. The mechanical model of aground ship was established based on its mechanical characteristics, and the influences of heel angle, draft, driving depth and natural properties of seabed soil on hull were analyzed. Taking a big-angle tilted aground LNG tanker as an example, the uprighting force, total aground force, shear, moment and torque of the tanker in the uprighting process were solved by the simulation of GHS software. Different uprighting schemes were compared, and the influences of uprighting modes, aground positions, superstructures and liquid gas storage tanks on uprighting process were analyzed. Analysis result shows that the changing trends of mechanical parameters of three schemes are similar. The larger differences are 9.1%-20.0% among the maximum uprighting forces of three schemes. The aground force, shear force and moment reach the maximums when the heel angle ranges from -55° to -50°. The stage need not exert larger uprighting forces, but the force situation of hull should be noticed. The torque changes enormously when the heel angle ranges from -120° to -100°. The opposite changing phenomenon of moment and torque directly threatens the safety of hull structure, so it should be handled with more care during uprighting process. The appropriate uprighting scheme is selected by considering the positions of points of uprighting forces and the reliability for the safety of hull and environment during uprighting process. 1 tab, 9 figs, 21 refs.

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Last Update: 2015-04-30