多元混合炸药爆轰驱动圆筒膨胀规律的理论确定方法

Theoretical Approach of Determining Expansion Law of Cylinder under the Detonation Driving of Multi-Component Explosive

为快速预估任意配比的多元混合炸药爆轰产物的JWL(Jones-Wilkins-Lee)参数,提出了快速确定多元混合炸药爆轰驱动圆筒膨胀规律的理论方法,即在给定各组分爆轰产物JWL参数的前提下,根据能量守恒定律,采用Gurney模型,确定圆筒试验中多元混合炸药爆轰驱动圆筒膨胀距离随时间变化的曲线。同时,利用能量守恒原理以及经典爆轰理论中通过常γ状态方程得到的爆速、爆压和爆热之间的关系式,提出了确定多元混合炸药爆速和爆压的方法。采用该理论方法,分别计算了多元混合炸药PBXC03和PBXC10爆轰驱动圆筒膨胀规律及爆速和爆压,计算结果与前人的实验结果符合较好,验证了该理论方法的可行性和有效性。

In order to provide basic data for quickly predicting JWL （Jones-Wilkins-Lee） parameters of multi-component explosive with any component ratio, this paper presents a theoretical approach for quickly determining the expansion characteristics of cylinder driven by detonation products of multi- component explosive in a cylinder test. Namely, based on the JWL parameters of each component in multi-component explosive, according to energy conservation principle and using Gurney model, the expansion displacement-time curve of cylinder under the detonation driving of multi-component explo- sive can be obtained. Meanwhile, utilizing energy conservation principle and the relationship between detonation velocity, detonation pressure and detonation heat from constant γ equation of state in classi- cal detonation theory, this paper also presents a theoretical approach for determining the detonation velocity and detonation pressure of multi-component explosive with any component ratio. Using this method, the cylinder expansion characteristics, detonation velocity and detonation pressure of a PBXC03 and a PBXC10 multi-component explosive were calculated,respectively. It is found that the calculated results are in good agreement with previous experimental results, which verifies the feasibil- ity of the theoretical approach.