基于能量集聚原理的全泄爆间室型结构内爆炸荷载计算

Calculation of the interior blast load for fully vented structures based on the energy gathering principle

全泄爆间室型结构（简称“全泄爆间室”）内发生爆炸时，冲击波峰压值和冲量值因其在结构内多次反射而增高，精确计算非常困难，为此，进行了大量的试验研究。根据试验波形和数据可知，室内受约束空气冲击波不断反射、冲击，成为能量不断集聚的合成波和密齿形集团冲击波，从而增大了间室内爆炸破坏力。基于能量集聚原理，引进能效系数η，以ηQ表示增大的爆炸药量，并用试验数据控制精度，提出了全泄爆间室结构内爆炸荷载计算方法。

When an explosion occurs within a fully vented structure, the peak pressure as well as the impulse associated with the initial shock front （free-air pressure） will be extremely high and, in turn will be amplified by their reflection within the chamber. The interior air blast wave is confined and reflected many times, precision theoretical calculation of blast load is very difficult. So we have done a lot of explosive test study. Based on the test waveforms and data, the air blast wave with high pressure lashes and reflects many times in a wink on the wall, leading to the energy gathering in wave action on the vent structure, the destructive power of the interior blast being increased. This paper introduces the calculation methed for the interior blast load of by importing energy coefficient η , increasing explosive quantity fully vented structures with energy gathering principle ηQ, and using coefficient K from the test results.