固体含能材料分子内部振动态的冲击激发

Shock Pumping of the Intramolecular Vibration for Energetic Materials

在冲击波机械能向分子内振动能传输Ｄｌｏｔ模型基础上，提出了一个进一步考虑激波后有声子场中传热效应相耦合的改进模型。数值计算的结果表明，考虑了热传导后，热声子浴以不考虑热传导时快得多的速度趋近于热力学系统的最终平衡温度。对于给定的冲击压力，分子内部振动态的弛豫时间与受冲击的硝基甲烷中Ｃ－Ｎ键的弯曲与伸展模式发时间实验结果基本一致。

On the bases of the Dlott's model describing the shock mechanical energy flowing into molecule,we present an improving model that considers the diffusion in the phonon field bdhind the shock wave The numerical solution shows that when thermal conduction is considered,the hot phonon bath approaches the final equilibrium state with much faster speed The relaxation time of intramolecular vibrational state is consistent with the measurement results