非均质固体炸药冲击起爆与爆轰研究进展

The physical mechanisms of shock initiation, developments of macro-/mesoscopic reaction flow models, numerical simulations at meso-/trans-scale and continuum scale for heterogeneous solid explosives, and shock initiation experiments and measuring technologies were reviewed, some new findings and opinions from authors and team coworkers were summarized, and the future development trend was pointed out to deepen the understanding of the physical mechanism of shock initiation in heterogeneous solid explosives, and provide methods and technical means for charge safety design. As a typical complex dynamic process, the onset of shock initiation of heterogeneous solid explosive is the result of multiple hot-spot formation mechanisms. However, the existing chemical reactive rate models, generally considering some one single hot-spot formation mechanism, are unsuited to the high-fidelity calculation of shock initiation process. Although the pressure-dependent reaction rate model adapts to the changes of mesostructure within certain range, it fails to physically correctly describe the desensitization or sensitization, the corner effected dead-zone phenomenon of explosives under complicated loadings such as the multiple shock-wave loading and ramp-shock combined loading, while the entropy- or temperature-dependent models are suitable for complex loadings, but don't consider the accurate prediction of structural response at meso-scale. Developing the multi-mechanism coupling hot-spot ignition model and the wide-ranging reaction rate model with high accuracy has been an important direction of the reaction flow model. The mesoscopic experimental diagnosis technology with high resolution and fast response has long been a technical difficulty in detonation field, thus the mesoscale modeling is the main method to investigate the shock initiated hot-spot formation mechanisms. The trans-scale modeling of shock initiation from mesocale to macroscale has been preliminarily realized, which is an important trend in the simulation of the shock initiation and detonation of heterogeneous solid explosive. With 151 references.