基于动力响应一致的原则,提出了将混凝土板所遭受的爆炸载荷等效为无升压时间的三角形均布载荷的方法.采用量纲分析将混凝土板的最大动量及其达到时间作为等效参数,得到了其在爆炸作用下的等效载荷超压峰值和持续时间与炸药当量和爆距之间的无量纲经验关系式.通过对一定无量纲范围内不同工况计算结果的拟合,确定了经验表达式中的常数.最后,采用数值方法对等效载荷和实际爆炸作用下混凝土板的动力响应数值分析结果进行比较,验证了该等效方法的有效性.%Based on the consistency of dynamic response, an equivalence method is proposed in which the explosive load acting on a concrete slab is simplified to be uniform triangle pressure load without ascending time. By using dimensional analysis, the maximum momentum of the structure and its arrival time are used as medium parameters, the relations of the peak overpressure and duration of the equivalent load with the explosive mass and distance are obtained. Afterwards, a series of numerical simulations are conducted, based on which the constants in the empirical formula are determined. Finally, the dynamic response of the structure subjected to the equivalent load and that caused by the true explosive load are compared by means of numerical simulations, which show good agreement and verify the validation of this method.
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