CL-20 explosive has a wide engineering application foresight due to its high energy while is limited by its mechanical sensitivity. In this regard, to study its ignition mechanisms under impact and to determine the main ignition sources, drop-weight experiments on CL-20 explosive crystals were carried out and recorded by a high-speed photography camera. Various configurations, e.g., film, ring, open ring and strips, were designed to explore primary ignition mechanisms and exclude secondary possible sources. The results show that the main ignition mechanism of CL-20 under drop-weight impact is the adiabatic compression of trapped gases. These trapped gases were mainly from the decomposition of CL-20 itself when melting. Our findings indicate that methods focusing on melting suppression should be considered to reduce the CL-20 sensitivity under impact.

CL-20炸药由于能量高而受机械灵敏度的限制，因此具有广泛的工程应用前景。在这方面，为了研究其在撞击下的点火机理并确定主要的点火源，对CL-20炸药晶体进行了落锤实验，并通过高速摄影机对其进行了记录。设计了各种配置，例如薄膜，环，开环和条带，以探索主要的点火机制，并排除可能的次要来源。结果表明，在落锤冲击下，CL-20的主要着火机理是截留气体的绝热压缩。这些截留的气体主要来自熔化时CL-20本身的分解。