聚脲涂覆钢板结构抗爆性能试验研究

研究聚脲不同涂覆方式下单钢板与箱体结构的抗爆性能.进行了15.7 kg/m2相同面密度条件下2.0，1.5与1.2 mm三种厚度钢板的无涂覆、迎爆面涂覆结构抗40 g TNT外爆载荷试验，相同钢板厚度条件下1.5 mm与1.2 mm两种厚度钢板的无涂覆、迎爆面涂覆与背爆面涂覆结构抗60 g TNT外爆载荷试验，以及3.0 mm厚钢板所组成箱体的无涂覆、迎爆面涂覆与背爆面涂覆结构抗140 g TNT内爆载荷试验，通过对比不同涂覆结构的变形与破坏行为，分析聚脲涂层对结构抗爆性能的影响.结果表明，等面密度时迎爆面涂覆聚脲不能提高钢板的抗爆性能，等钢板厚度时涂覆聚脲能够有效提高钢板与箱体结构分别在外爆与内爆载荷下的抗爆性能，且背爆面涂覆时效果优于迎爆面涂覆. 

Experimental Investigation on the Performance of Polyurea-Coated Structure Under Blast Loads

The blast-resistance capacity of different polyurea-coated plates and box structures subjected to blast loads was investigated. For polyurea-steel plates,two methods were adopted:steel plates of three thicknesses(2.0,1.5 and 1.2 mm) and two types(no polyurea and with polyurea on the front face)with the same areal density of 15.7 kg/m² were considered under explosive loading by 40 g TNT; steel plates of two thicknesses(1.5 and 1.2 mm) and three types (no polyurea,with polyurea on the front face and with polyuria on the back face)with the same steel thickness respectively were subjected to 60 g TNT. Then experiments of polyurea-steel box under implosive loading were conducted by 140 g TNT.Deformation and failure were compared with each event and effects of polyurea coating on the performance of structures were analyzed further.Results from the experiments reveal that polyurea coating does not contribute to the performance of steel plates with the same areal density,while polyurea coating can improve the blast resistance of steel plates and steel boxes with the same steel thickness under explosive and implosive loading. And polyurea cast on the back face exhibits better performance than that on the front face.