运动激光辐照圆柱薄壳温度场的数值模拟  

Numerical Simulation of the Temperature Field in the Thin Shell Irradiated by Mobile Laser Beam

作　　者：吴非[1] 周建平[1] 雷勇军[1] 

机构地区：[1]国防科技大学航天与材料工程学院,湖南长沙410073

出　　处：《国防科技大学学报》2005年第3期10-15,共6页Journal of National University of Defense Technology

基　　金：国家杰出青年基金资助项目(19925209);湖南省自然科学基金资助项目(02JJY2009)

摘　　要：对圆柱薄壳在四种不同运动模式激光源辐照下的温度场分布进行了分析研究。运用傅立叶级数展开法推导了在不同运动模式激光源作用下圆柱薄壳温度场的解析表达式,并对该解析表达式进行了编程计算,其计算结果与有限元解吻合良好。详细分析了旋转角速度与平动速度对圆柱壳温升分布的影响,发现在往复运动加热模式下光斑区域的温升变化最为剧烈。计算结果为导弹的抗激光辐射提供了理论依据。The temperature distribution of the cylindrical shell irradiated by mobile laser beam is studied. Based on the method of Fourier series expansions, an analytical solution of the temperature field is deduced for the thin cylindrical shell, irradiated by intensive laser beam in four different motion modes, and programs are coded for computation. Numerical simulation results of this method are identical with those of finite element method. Finally, we analyze the effect of the rotating angular velocity and moving velocity on its temperature field under laser irradiation. The conclusion is drawn that temperature rise is most prominent in the case of periodic irradiation. Numerical results provide evidence for the laser resistant radiation of missiles in theory.

关 键 词：激光辐照 解析解 温度场 有限元法 

分 类 号：TN246[电子电信—物理电子学]