Abstract
Flexible inflatable membrane structure has the characteristics of light weight, large span, and small stiffness, and it is very sensitive to wind load. Aiming at the dynamic response of marine evacuation inflatable slides under complex and changeable wind loads at sea, the response law of the inflatable slide under different wind directions, wind speeds, and internal pressure conditions is studied by using fluid–solid coupling theory. The most dangerous conditions of evacuation system installation and the ideal internal pressure of the inflatable slide meeting the stability requirements are deduced. The LS-DYNA module is used to simulate the inflation process of the slide. The evacuation sliding is rationally simplified. By changing the inflatable internal pressure of the slide, the variation law of displacement, deformation, and sliding speed of the slide is obtained, and the optimal inflation internal pressure satisfying the evacuation efficiency requirement is obtained. The results show that the inflow wind direction angle of 30° is the most dangerous condition for slideway installation, and the internal pressure of 4000 Pa is the ideal internal pressure to meet the double standards of stability and evacuation efficiency. The numerical results obtained are valuable for analyzing wind resistance of offshore inflatable membrane structures and their practical design and application in evacuation systems.
Highlights
With the increasing dependence of economic development on marine trade, shipping routes are complex and the incidence of various maritime accidents is gradually increasing [1]
The above shows that the displacement deformation of the inflatable slide under wind load is the largest under the condition of 30◦ of wind direction angle, and its ability of resisting wind speed change is poor
Redundant inflatable internal pressure means that the evacuation system needs to carry more gas deformation changes are no longer obvious
Summary
With the increasing dependence of economic development on marine trade, shipping routes are complex and the incidence of various maritime accidents is gradually increasing [1]. The inflatable slide evacuation system is a kind of lifesaving equipment mainly used in the evacuation of distressed persons on roll-on ships It is composed of an evacuation box frame, integrated inflatable slide and sea mounting platform, telescopic guide rail, load-carrying frame and air charging device [3]. 1-life raft, 2-integrated inflatable slide slide and sea mounting platform, 3-telescopic guide rail, 4-load-carrying frame, 5-air charging device,. 1-life raft, 2-integrated inflatable slide and sea mounting platform, 3-telescopic guide rail, 4-load-carrying frame, 66-pulley receiving and placing mechanism. The displacement, displacement, deformation wind distribution ofof flexible film under wind validation standard for the response state ofand a lifesaving inflatable slide under wind load. With the deepening research andthe the development scientific research means, physical model finite element numerical simulation methods in response analysis of flexible membrane structures. Wind-Load Response Analysis Method of Inflatable Slide and Establishment of Numerical Model
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