Mechanical Numerical Simulation And Design Of Descent Buffering Structure Of Rope Net Evacuation Slide

The rope net descent buffering structure is the core of marine emergency evacuation system.In the early design,due to the insufficient understanding of the human body load application and the force characteristics of each cushioning component,during design the safety factor of each component is conservative,not only does it increase the weight of the overall structure,but it also does not give full play to the buffering capacity of each component.This paper has researched mechanical property of rope net in the whole process of human body buffering glide,and uses method that combines principle experiment with numerical simulation,which includes passive buffer deformation of rope net,load path,the effects of structural parameters on buffering capacity.Specific contents as follows:Firstly,reviewing the background,design purpose and related charters of marine evacuation system,summarizing the development actuality and current likewise.Conducting principle experiments purpose to test the designed structure,which based on advantages of existing sea evacuation slide structure inland and abroad.Complex sea conditions are also taken into account.Secondly,the deformation characters of descent buffering structure were obtained when people were gliding,combined with the experiments mentioned before.The deformation characters of rope net and endmost support member were defined.Based on the real work condition of buffering members of rope net evacuation slide,the stress and deformation distribution characters are summarized and analyzed.On this basis,an overall numerical simulation calculation framework is constructed to reappear whole process of descent evacuation by rope net.The effectiveness of the calculation framework is verified by comparing with the experiment.Thirdly,a precise analysis of impact deformation characters and force transfer mechanism of the flexible rope net was carried out,by means of numerical calculation,to investigate the stress and deformation characters of buffering net and related components with the corresponding time sequence.Then,mechanical characters of rope net in the descent buffering process were analyzed,and the force transfer mechanism of flexible descent buffering structure was summarized.By analyzing the force transfer mechanism,the process of human descent buffering evacuation can be divided into three stages which are sliding in,sliding,and sliding out.The character of deformation and energy distribution ratio of each buffering member were analyzed based on this partition method.By Lastly,the effect of left(right)support rope diameter,under support rope diameter and support spring stiffness on the force and deformation distribution of descent buffering net,as well as other parts were analyzed in terms of improving the work condition and life of buffering rope net which provides reference for the structure design.