Dynamic Response Of Polar Cruise Ship Evacuation System And Evacuation Analysis

Polar cruise ships mainly sail in polar waters.When they need to leave the ship to escape in an emergency,because of the low population density in the polar regions,rescues often cannot arrive quickly.The polar cruise ship evacuation slide system is a means to provide self-rescue in the event of an accident,and provides a safe and rapid way for passengers on polar cruise ships to evacuate.Facing the complex wind and wave conditions in the polar ocean and the impact of ice floes in the polar ice area,the polar cruise ship evacuation slide system will tilt under working conditions,which affects the safety of evacuation and the speed of passenger evacuation.Therefore,it is necessary to analyze the dynamic response of the evacuation system in the polar environment under the ice impact state and the cruise evacuation analysis.This paper uses the finite element model and based on the fluid-solid coupling method to analyze the dynamic response to obtain the use of the ice impact on the evacuation system and deployment requirements of the evacuation system.First,analyze the factors in the polar ocean environment that have an effect on the polar cruise evacuation system,and determine the working sea conditions to lay the data foundation for the subsequent analysis.Based on the obtained results,a reasonable polar cruise ship evacuation system structure is designed,and the ice protection and deicing methods used in polar environments are analyzed.Simplify the polar cruise evacuation system model,and use LS-DYNA software to establish a simulation model of the polar cruise evacuation system colliding with floating ice in the sea water fluid area.The fluid area(sea water)has certain obstacles to the impact process,and fluid-structure coupling needs to be introduced.Set to offset the influence of seawater and set all contact conditions and boundary conditions reasonably.Then the dynamic response analysis of the polar cruise evacuation system is carried out.Based on the finite element collision model,the collision force of the ice on the boarding platform of the polar cruise evacuation system under different ice densities,different drift speeds and different stable counterweights is carried out.By calculation,the working sea conditions and stable counterweight quality suitable for the polar cruise evacuation system are obtained.Both the density of ice floes and the drift speed of ice floes are related to the collision force received by the water boarding platform,causing the water boarding platform to sway from side to side.The mass of stable counterweights will affect the amplitude and frequency of the swaying.According to the way the passengers in the evacuation system slide by gravity,calculate the minimum length of the slide that is not affected by the impact of ice floes and used safely.Finally,a polar cruise ship evacuation model that conforms to the actual situation is established,and the factors affecting the evacuation speed are analyzed,and the evacuation time of passengers in the polar cruise ship’s upright and inclined state is analyzed.The evacuation speed of passengers in the tilted state of a polar cruise is related to the tilt angle.The above research can help find the length of the chute length and stable counterweight quality parameters of the polar cruise evacuation chute system that enables passengers to safely and quickly evacuate,reduce the impact of environmental factors on the system and passengers,and provide optimization and theory for the subsequent design of the polar cruise evacuation system calculation support.