Experimental and numerical simulation study on vertical static performance of prefabricated cabins in modular substation
In order to investigate the safety of prefabricated cabin structure of modular substation under design loads and the influence law of different design parameters,a study was carried out on the vertical static performance of prefabricated cabin structure.The vertical static loading test was conducted on the prefabricated cabin of the 220 kV Lingang substation in Bengbu,Anhui Province.The vertical pushover numerical simulation of the prefabricated cabin was performed using ABAQUS finite element software.The damage mode of the prefabricated cabin was analyzed,and the parametric analysis of the vertical bearing performance of the prefabricated cabin was carried out.The test results show that the bearing capacity and deformation of the prefabricated cabin under the design load meet the code GB 50017-2017 requirements.Under the action of vertical pushover,the beam-column connection at door opening and the main-secondary purlin connection at cabin bottom are damaged successively,and the corrugated board is basically not damaged.Setting up columns reduces the displacement of the bottom beam of the prefabricated cabin by 32.7%,and columns are recommended for door openings.The lower beam maximum displacement of the prefabricated cabin is reduced by 39.9%by a unilateral arrangement of the loads,and the equipment should be placed as far as possible on the side without a door opening.Compared with increasing the thickness of corrugated boards,laying sealing boards at the bottom can effectively reduce the vertical displacement of the prefabricated cabin.For large-span prefabricated cabins,it is recommended to use three equal points of lifting for bottom beams.The prefabricated cabin prioritizes end window openings,and the number of openings and spacing of openings should be limited for the prefabricated cabin with load side openings.The study clarifies the vertical load bearing performance of prefabricated cabin structures and proposes design suggestions,which can provide certain reference for the application of prefabricated cabin in actual projects.
metal structureprefabricated cabinvertical mechanical performancestatic loading testnumerical simulation
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