聚脲涂覆钢板在爆炸载荷作用下的动态响应

Dynamic Response of Polyurea Coated Steel Plate under Blast Loading

在验证了所用方法有效性的基础上,采用有限元软件LS-DYNA数值模拟了等面密度聚脲涂覆钢板结构及单一钢板在空爆下的动态响应,分析了聚脲涂覆位置对其抗爆性的影响;在此基础上,通过量纲分析的方法讨论了爆心距、炸药质量、涂覆聚脲厚度对钢板变形的影响规律。结果表明,聚脲涂覆在钢板上的位置影响其抗爆性能。其他变量一定的情况下,钢板中心最大位移随爆心距的增加近似呈指数递减趋势;改变炸药质量时,钢板中心最大位移随炸药质量的增加近似呈线性递增趋势;改变涂覆聚脲厚度时,钢板中心最大位移随涂层厚度的增加近似呈线性递减趋势。

The dynamic response of the equivalent areal density polyurea-coated steel plate and a single steel plate under air blast loads is simulated by using the finite element software LS-DYNA after the validity of this method is demonstrated. The influence of polyurea coating position on its antiknock ability is analyzed;Besides, the method of dimension analysis is employed to study the response of the distance between explosive and steel plate, spherical charge’s quality, and the polyurea layer thickness on the deformation of steel plates based on the prior study. The results show that the position of polyurea coated on steel plate affects its antiknock performance. When other variables are assumed to be constant, the maximum displacement of the center of the steel plate exponentially decreased with the increase of the distance between the distance between explosive and steel plate;Moreover, when the quality of the explosive is changed, the maximum displacement of the steel plate increases linearly with the increase of the explosive mass;Also, when the thickness of the coated polyurea is changed, the maximum displacement of the steel sheet decreases linearly with the increase of the thickness of the coating.