Research And Application Of Fire Ponding Effects On Stablity Of Ro-Ro Passenger Ship

Ro-ro passenger ship has an irreplaceable position in the process of passenger and cargo transport at sea because of its convenient and fast characteristics.However,due to the structural characteristics of ro-ro passenger ships and the particularity of the cargo,the phenomenon of ro-ro passenger ships capsizing often occurs after fire.The reason is the loss of ship stability in the process of firefighting.In the process of firefighting,due to the influence of wind and waves,vehicles move or dump,fire water drainage is not smooth and a large area of free surface is formed,which makes the ship stability reduced or lost,and causes the capsizing of the ship.The purpose of this paper is to guide the fire rescue of ro-ro passenger ships to carry out scientific rescue,avoid secondary accidents and ensure the safety of rescue through the research on the stability of the ro-ro passenger ships.In this paper,considering the characteristics of ro-ro passenger ship ships,the calculation model of ship stability and wind loading rating is established,and the calculation method of free surface liquid heeling moment under near-empty tank condition is applied to determine the minimum capsizing moment of ships in the presence of fire water ponding.This paper selects a common ro-ro passenger ship to get the instance calculation,systematically calculates the rule of the effect of ponding water to ship's stability when sprinkling of fire water in vehicle loading compartment,including the initial stability height,righting arm curve,minimum capsizing moment.And then analyses the influence of ponding water to wind loading rating of the ship when sprinkling of fire water in vehicle loading compartment.Finally,on the basis of the liquid level monitoring system of ro-ro passenger ship,the paper puts forward the fire monitoring alarm and auxiliary decision-making system of ro-ro passenger ship,introduces the working principle of the system,constructs the system framework,designs the system flow,and guides the scientific rescue by monitoring the water,calculating the ship stability and wind loading rating.Through the research in this paper,it can improve the safety of fire rescue of ro-ro passenger ships,avoid the capsizing of ship after fire,and ensure the safety of ship.