爆轰加载下柱壳断裂时刻微小差异测量方法

Method for calculating small difference of fracture time of cylinder shell unloaded by detonation

对于断裂时刻差异较小的对比实验,提出一种判读方法:同时采用高速摄影和干涉测速,利用高速摄影判读壳体断裂时刻应变,利用干涉测速获取壳体位移及应变曲线,两者结合得出较为精确的壳体断裂时刻差异。利用该方法得出45钢柱壳在JO-9159和JOB-9003两种炸药加载下断裂时间相差0.45μs,钨合金柱壳在两种炸药加载下的断裂时间相差0.39μs。同时该方法可以推广应用于单发壳体膨胀断裂实验中,更精确测定壳体的断裂时刻。

One method is offered for calculating small difference of fracture time of cylinder shell in contrast experiments. The fracture strain of cylinder shell was measured by high-speed photography, and simultaneously the velocity-time curve and displacement-time curve were measured by Velocity Interferometer System. The difference of fracture time is calculated by two kinds of measurement re- sults. The difference of fracture time of 45 steel cylinder shell unloaded by JO-9159 and JOB-9003 ex- plosive is 0.45 μs, and the difference of fracture time of W alloy is 0.39μs. The method can be used to measure more accurately the fracture time of cylinder shell unloaded by detonation.