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以Ｄ－４５，Ｓ－１４，３／１三种发射药为研究对象，对钢管约束条件下的高密实火药颗粒床的燃烧转爆轰（简称ＤＤＴ）机理和敏感性进行了实验研究。分别用应变片和离子探针测量了药床中的压缩波和燃烧波的传播，通过对压缩波阵面和燃烧波阵面的分离，发现压缩波形成于火焰峰后的已燃区，它将不断加速与加强，最后赶上火焰峰形成强冲击波而诱发爆轰。提出了点火具处的压力快速上升是形成压缩波的必要条件，从而对三种发射药的ＤＤＴ特性的差别做了很好的解释。此外，还考察了实验参数（火药特性，装填密度，约束条件）对ＤＤＴ特性的影响。
Taking D-45 and S-14/13 propellant as the research object, the mechanism of combustion detonation detonation (DDT) and sensitivity of the high-density gunpowder bed with steel tube confinement were studied. The compression wave and the combustion wave were measured by strain gauges and ion probes respectively. After separating the compression wave front and the combustion wave front, it was found that the compression wave was formed after the flame peak. Will continue to accelerate and strengthen, and finally catch up with the formation of a strong shock wave flame burst detonation. It is proposed that the rapid rise of pressure at the ignition point is a necessary condition for the formation of compressional wave, so that the differences of the DDT characteristics of the three propellants are well explained. In addition, the experimental parameters (gunpowder properties, packing density, constraints) on the DDT characteristics were also investigated.