高饱和度饱和砂中爆炸波传播规律的自由场实验研究  

The Free-field Experimental Study on Blast Wave Propagation in Saturated Sand with High Degree of Saturation

作　　者：穆朝民[1,2,3] 齐娟[2] 辛凯[1] 

机构地区：[1]总参工程兵科研三所,河南洛阳471023 [2]安徽理工大学,安徽淮南232001 [3]煤矿安全高效开采省部共建教育部重点实验室,安徽淮南232001

出　　处：《弹箭与制导学报》2010年第5期87-89,96,共4页Journal of Projectiles,Rockets,Missiles and Guidance

基　　金：国家自然科学基金(10632080);国家自然科学基金(10402041;10572134)资助

摘　　要：为了研究爆炸波在高饱和度饱和砂传播特性,利用Φ2.5×5m爆炸模拟装置进行饱和砂接触爆炸模拟试验的过程,实验得到了爆炸波在饱和砂自由场中传播大量的试验数据。根据实验测得的数据,拟合出压力、动量、上升时间随比例距离变化的公式,得到了爆炸波在饱和砂中的衰减规律。理论分析揭示了饱和砂中应力波传播时出现流体动力区和冲击波形成等性质,建立了饱和砂双线性递增硬化本构关系。In order to study propagation of blast wave, the test simulating contact explosion in saturated sand was completed in the Ф2.5 × 5m pothole. Through the experiment, the data of the free-field in the saturated sand was got. According to analysis of the test data, the spreading law of the wave in free-field of saturated sand was obtained. Through the experiment, the data of the freefield in the saturated soil was obtained. The formulas of pressure, momentum and rise time with distance were fitted based on a large number of test data. Theoretical analysis shows that saturated sand has the nature of liquid-dynamic area appearing and shock wave forming when the stress wave spreads in the saturated sand. The bilinear progressively increasing-hardening constitutive relation in saturated sand was established. Dividing pressure was determined and that is the value from shock wave to elastic wave.

关 键 词：爆炸力学 饱和土 自由场实验 爆炸波 

分 类 号：O383.1[理学—流体力学]