激光辐照下圆薄板的动态屈曲研究

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基金项目: 国家自然科学基金资助(10002021);国家高技术计划激光技术领域的资助(863-802-4)

Studies On the Dynamic Buckling of Circular Plate Irradiated by Laser Beam

摘要: 对强激光辐照下薄板(铜片)的动态热失稳过程进行了分析,得出了简支圆薄板在热冲击下发生的屈曲及后屈曲过程,并给出了临界激光功率密度与薄板厚径比的关系曲线,方法计入了温度分布、惯性项和缺陷大小对于失稳过程的影响。这一工作有利于人们对强激光引起的硬目标破坏机理的认识。
- 激光 /
- 屈曲 /
- 热冲击
Abstract: The dynamic buckling of thin copper plate induced by laser beam, was analyzed with the numerical integration and disturbance methods of controlling equation. The buckling and post-buckling of thin plate were shown, with the consideration of the temperature distribution, inertia effect and initial deflection. At last, the buckling criterion about the circular plate was obtained and used to investigate the relation between the critical laser intensity and the ratio of thickness and diameter of the plate. The results fit the experimental observation and the FEM simulation very well, and benefit to the understanding of failure phenomenon of structures irradiated by laser beam.
- laser /
- buckling /
- thermal shock

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