Abstract A surface evolution model is developed for the detonation propagation dynamics of the HMX-based conventional high explosive PBX 9501, which relates the normal surface speed Dn to its local surface curvature κ. Such surface evolution models are important for the understanding and modification of engineering design calculations for high explosive applications. We describe a series of unconfined PBX 9501 slab geometry experiments of varying thickness, and detail how the steady axial detonation speed and detonation front shape data are obtained. A merit-function based calibration process is then described that uses both the PBX 9501 thickness effect and front shape data to parametrize the D n − κ propagation law. The time-dependent PBX 9501 D n − κ surface evolution law is then applied to detonation wave propagation in two-dimensional circular arc geometries, systematically examining the effect of arc thickness, inner radius, relaxation dynamics to steady-state propagation and confinement.

中文翻译：

---

基于 HMX 的常规高炸药 PBX 9501 的爆炸冲击动力学建模和校准，并应用于二维圆弧几何

摘要 针对基于HMX 的常规高炸药PBX 9501 的爆轰传播动力学，建立了一种表面演化模型，该模型将法向表面速度Dn 与其局部表面曲率κ 联系起来。这种表面演化模型对于理解和修改高爆应用的工程设计计算很重要。我们描述了一系列不同厚度的无侧限 PBX 9501 板几何实验，并详细说明了如何获得稳定的轴向爆轰速度和爆轰前沿形状数据。然后描述了基于评价函数的校准过程，该过程使用 PBX 9501 厚度效应和前部形状数据来参数化 D n - κ 传播定律。