爆炸冲击波作用于墙体及对墙体绕射的实验研究

采用试验的方法,对爆炸冲击波作用于防爆墙及绕过墙体的规律进行了研究.采用压力传感器测压,获得了防爆墙前后不同距离的压力波形.试验结果表明:作用于前墙迎爆面反射超压一般要比墙后最大绕射超压大一个数量级,马赫反射一般发生在距离墙后1.5~2.0倍墙高处,药量与爆心距离对墙体反射超压及墙后绕射超压的变化规律有重要影响.通过综合分析和试验结果,得到了爆炸波绕射的内在机理,为防爆墙的设计与加固提供依据和参考.

Experimental Study of Blast Wave Reflection and Diffraction on a Shelter Wall

Experimental study of the reflection and diffraction of blast shock waves on a shelter wall was performed. Pressure transducer measurement was used to obtain pressure distribution in front of and behind the shelter wall at different distances. Results show that: (1) The value of reflected pressure is about 10 times the maximum value of diffraction pressure. (2) The distance from Mach reflection site to the back site of the shelter wall is 1.5-2.0 times the wall height. (3) The location of explosion center and explosive charges strongly influenced the characters of diffraction pressure and reflected pressure. Experiment and comprehensive analysis both show the blast shock wave inherent mechanism around the shelter wall and provide the reference for reinforcement of shelter wall.