强激光辐照下充内压圆柱壳的破坏阈值和破坏时间  

Damage Threshold and Damage Time of Cylindrical Shells with Inner Pressure under Intensive Laser Loading

作　　者：郭少锋[1] 陆启生[1] 陈金宝 程湘爱[1] 江厚满 

机构地区：[1]国防科技大学理学院定向能技术研究所,湖南长沙410073

出　　处：《中国激光》2002年第9期783-786,共4页Chinese Journal of Lasers

摘　　要：建立了强激光辐照下充压圆柱壳热力学响应的物理模型和数值计算模型,求解了激光产生的非线性温度场。在此基础上,考虑塑性和屈服强度的温度相关性,求解了非线性的应力场,计算了两种不同类型圆柱壳在高功率连续CO_2激光作用下的破坏阈值,给出了破坏时间与功率密度的关系以及壳体破坏的危险区域。Damage mechanism of shells with inner pressure that are exposed to high power CW CO2 laser is studied here. The physics model and numerical solution model of thermal and mechanical responding is described. The finite element method is used to simulate nonlinear temperature and stress profile. Two types of shells are considered and the laser power density is varied from 400 W/cm2 to 1500 W/cm2. The damage times are presented and the damage areas are plotted.

关 键 词：强激光 圆柱壳 破坏阈值 破坏时间 预应力结构 

分 类 号：TN241[电子电信—物理电子学]