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激光辐照转动充压圆柱壳体热力学效应

Sheng DING,Jian-guo WANG,Feng LIU,Qing-bang SHU,Yu-heng WANG

Qiangjiguang Yu Lizishu/High Power Laser and Particle Beams（2006）

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Abstract
采用有限元计算方法对激光辐照下转动充压壳体的热力学问题进行了较为全面的数值计算,获得了激光辐照下转动内压圆柱壳壁上的温升、应力、应变、位移分布等物理图像,为进一步分析转动充压圆柱壳体在激光辐照下的破坏与失效奠定了基础.提出的解决数值计算中移动热流载荷问题的双时间步长法,可以有效提高计算效率,同时提高计算精度.研究结果表明:对于给定的壳体结构,其损伤阈值时间主要取决于靶面激光强度与壳体旋转频率;在辐照过程中,损伤最先出现在最初受激光辐照的区域.
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Key words
Double time step method,Laser irradiation,Rotating shell,Thermal-mechanical coupling,Yield ratio
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