动爆载荷作用下舱室结构毁伤效果研究

Research on damage effect of cabin structure under dynamic explosion load

运用数值仿真计算方法,研究动爆载荷作用下舱室结构的毁伤效果。动爆载荷对舱室结构毁伤效果的不对称性主要体现在装药运动正、负向舱壁的破坏模式及破坏程度不同。基于仿真计算工况,总结出舱室结构的5种不对称破坏模式。依据量纲分析理论,提出一组适用于动爆载荷作用下舱室结构不对称破坏模式的无量纲表达式,并将无量纲表达式应用于动爆载荷作用下舱室结构毁伤效果的分析中,结合大量工况的数值模拟结果,拟合得到了舱室不对称破坏模式分布图及评估区间,实现了动爆载荷对舱室结构毁伤效果的快速预测与评估。

The damage effect of cabin structure under dynamic explosion load is studied by numerical simulation method. The asymmetry of the damage effect of dynamic explosion load on cabin structure is mainly reflected in the different damage modes and degrees of positive and negative bulkheads of charge movement. Based on the simulation calculation conditions, five kinds of asymmetric failure modes of cabin structure are summarized. Based on the theory of dimension analysis, put forward a set of suitable for dynamic critical load under the action of asymmetrical cabin structure failure mode of the dimensionless number, and the dimensionless number is applied to dynamic critical load under the action of the cabin structure damage effect analysis, combined with the working condition of a large number of numerical simulation results, fitting the cabin asymmetric failure mode distribution and assessment range, has realized the dynamic critical load structure damage effect to fast prediction and evaluation of cabin.