激光技术, 2010, 34 (5): 697, 网络出版: 2010-09-25  

光强分布对激光辐照下柱壳热力学行为的影响

Influence of beam intensity distribution on the thermal and mechanical behavior of cylindrical shells under laser irradiation
作者单位
中国工程物理研究院 流体物理研究所, 绵阳 621900
摘要
高功率激光对承力结构的破坏机理研究,可以拓展激光技术的应用范围。为了研究光束强度分布对激光辐照下柱壳热力学行为,采用有限元方法建立充压柱壳的热力学模型,先保持激光辐照总功率相等,将几种典型激光束进行分析比较,并研究了充压柱壳在各种光束辐照下的热力学响应。结果表明,光强分布对圆柱壳的温度、应力以及位移场分布具有重要影响,在不同光强分布的激光束辐照下圆柱壳将具有不同的破坏模式和破坏时刻。
Abstract
The research of the failure mechanism of load-carrying construction under high-power laser irradiation can expand the field of laser application. In order to investigate the influence of beam intensity distribution on the thermal-mechanical behavior of cylindrical shells under laser irradiation, firstly the thermal-mechanical model of the cylindrical shell was constructed by means of finite element method. Taking total laser power equal, several typical distributions were analyzed and compared. Then thermal-mechanical response of the internal pressured cylindrical shell under different laser irradiation was studied. Numerical results indicate that intensity distribution has a significant effect on temperature, stress and displacement fields of cylindrical shell. The cylindrical shells irradiated by laser beams with different intensity have different failure mode and failure time.

张家雷, 谭福利, 王伟平. 光强分布对激光辐照下柱壳热力学行为的影响[J]. 激光技术, 2010, 34(5): 697. ZHANG Jia-lei, TAN Fu-li, WANG Wei-ping. Influence of beam intensity distribution on the thermal and mechanical behavior of cylindrical shells under laser irradiation[J]. Laser Technology, 2010, 34(5): 697.

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