# Wind-Load Response and Evacuation Efficiency Analysis of Marine Evacuation Inflatable Slide
## 5 Conclusions  
In this paper, the wind-load response, inflation pressure, and evacuation efficiency of the inflatable slide of the marine evacuation system under complex marine environments are studied. Based on the fluid-solid coupling CFD-CSD calculation theory, the actual engineering project model is analyzed, and the following main conclusions are obtained:  
1. Under the action of wind load, the windward and leeward surfaces of the inflatable slide are the main areas where the depression occurs. The overall height of the structure increases under the action of wind field. In addition to the positive pressure on the direct windward surface, the negative pressure distribution occurs in most areas of the structure surface under different working conditions.
2. The inflow direction has a great influence on the displacement, deformation, and wind pressure distribution of the inflatable membrane structure. Considering the wind direction and the inflow velocity gradient, in the wind direction range of the test, it is concluded that the wind direction angle of about 30\({}^{\circ}\) is the most unfavorable working condition for emergency evacuation slide.
3. With the increase of the inflatable internal pressure, the overall stiffness of the structure increases, the displacement deformation of the structure decreases gradually, and the bending  
Figure 19: Simulation of the sliding process of the inflatable slide. (**a**) Evacuation sliding state diagram at 1.0 s; (**b**) Displacement response of inflatable slide at 1.0 s; (**c**) Evacuation sliding state diagram at 2.0 s; (**d**) Displacement response of inflatable slide at 2.0 s; (**e**) Evacuation sliding state diagram at 3.0 s; (**f**) Displacement response of inflatable slide at 3.0 s.  
displacement caused by personnel sliding on the slide decreases continuously, and the sliding rate increases steadily.  
To sum up, 4000 Pa inflatable internal pressure is the ideal pressure which meets the double standards of stability and efficiency of the inflatable slide studied in this paper. The research results have practical value for wind resistance analysis and engineering application of the inflatable sliding evacuation system.  
Conceptualization, F.K.; methodology, H.D. and B.W.; software, Z.J.; validation, H.C. and H.P.; writing--original draft preparation, H.L. and B.W.; writing--review and editing, H.D. and W.S.; funding acquisition, F.K. All authors have read and agreed to the published version of the manuscript.  
This paper is financially supported by the High-Tech Ship Scientific research project in 2018 (Ministry of Industry and Information Technology packing letter [2018] no. 473, and Emergency Evacuation Chute System Development, Ministry of Industry and Information Technology packing letter [2017] no. 614), the National Natural Science Foundation (Grant No. 51979063 and No. 51679044) and China's National Key Program Subsidized Projects: (2018 YFC0810402).  
The authors declare no conflict of interest. The funders had no role in the design of the study; in the collection, analyses, or interpretation of data; in the writing of the manuscript, or in the decision to publish the results.