基于充压柱壳损伤形态的靶面激光参数估计  

Estimation of Laser Beam-Parameters Based on Damage Configuration of a Cylindrical Shell Subjected to Internal Pressure

作　　者：刘峰[1] 陈雨生[2] 吴振森[1] 王立君[2] 王玉恒[2] 

机构地区：[1]西安电子科技大学理学院,陕西西安710071 [2]西北核技术研究所第五研究室,陕西西安710024

出　　处：《中国激光》2007年第6期797-803,共7页Chinese Journal of Lasers

基　　金：国家自然科学基金(60371020);国防预研项目(513110203)资助课题

摘　　要：为了在实验室设计激光辐照金属充压柱壳的损伤形态,对壳体损伤形态相关的靶面激光参数估计问题进行了研究。在忽略沿柱壳壁面热传导的条件下,给出了壳壁温度分布的解析表达式;根据随温度变化的材料力学参量和内压载荷,分析了壳体激光加热区内热裂纹的生成、稳定扩展和失稳扩展,推导出了壳体发生三种损伤形态的靶面激光参数估计表达式。针对30CrMnSi钢壳体进行了数值计算分析,数值结果与实验现象基本一致。研究结果表明,在给定目标特性条件下,充压柱壳激光辐照效应的损伤形态可以通过选择激光器参数来实验设计。In order to design the damage configuration of a cylindrical shell subjected to internal pressure and irradiated by laser beam in the laboratory, the estimation method of laser parameters on the shell-wall surface related to the damage configurations is theoretically studied. Neglecting the heat conduction in the direction of shell-wall surface, an analytical expression of temperature profile is obtained for the cylinder shell under laser-irradiation. According to the mechanical properties varying with temperature and internal pressure, analyses of the thermal crack formation, the thermal crack growth and the crack running are carried out. The laser parameters expression on the target surface is derived for the three kinds of damage configurations. Numerical calculation is performed for a 30CrMnSi-steel cylindrical shell, the numerical results accord with the experiment phenomenons. The results show that given the cylindrical shell properties and internal pressure, the damage configuration can be experimentally designed by the laser parameters choice.

关 键 词：激光技术 靶面激光参数 热效应 损伤形态 充压柱壳 

分 类 号：TN249[电子电信—物理电子学] O343.6[理学—固体力学]