混凝土板在接触爆炸作用下的震塌和贯穿临界厚度计算方法

发布时间：2018-04-11 05:02

本文选题：爆炸力学 + 临界厚度　；参考：《爆炸与冲击》2016年04期

【摘要】：采用刚塑性模型描述介质的动力学行为,结合不可压缩条件和质量守恒条件及边界条件,构造塑性区的动力学许可速度场;利用极限平衡原理推导动力学许可速度场所对应的介质抗力的量纲一表达式;根据初始条件和边界条件,求解运动方程,分别得到爆炸震塌的临界厚度和爆炸贯穿的临界厚度,并推得能够反映爆炸源参数和材料参数综合性质的量纲一冲击因子。将推得的计算公式与经验公式对比分析,证明本文计算结果合理,推导的计算公式揭示了经验公式的物理本质,且具有较为广泛的适用范围。
[Abstract]:The rigid plastic model is used to describe the dynamic behavior of the medium, and the incompressible condition, the mass conservation condition and the boundary condition are combined to construct the dynamic allowable velocity field in the plastic zone.By using the limit equilibrium principle, the dimensionality expression of the medium resistance corresponding to the dynamic allowable velocity is derived. According to the initial conditions and the boundary conditions, the motion equations are solved, and the critical thickness of the explosion collapse and the critical thickness through the explosion are obtained, respectively.The dimensionality impact factor which can reflect the comprehensive properties of the explosion source parameters and the material parameters is also derived.The comparison and analysis of the deduced formula and the empirical formula prove that the calculation results in this paper are reasonable. The derived formula reveals the physical essence of the empirical formula and has a wide range of application.
【作者单位】：解放军理工大学爆炸冲击防灾减灾国家重点实验室;
【基金】：国家自然科学青年基金项目(51308543) 教育部长江学者和创新团队发展计划项目(IRT13071)
【分类号】：TU37;O38

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