连续激光作用下圆板大理挠度的论分析
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摘要: 利用Berger和Galerkin近似法，导出了在连续激光与横向力联合作用下固支圆薄板的轴对称大挠度w的表达式。针对空间均布和Gauss型分布激光束辐照的情况，采用理论和有限元法计算了板中心挠度wc随辐照时间及横向力的变化,讨论了板中温度矩MT、温度膜力PT和材料参数(弹性模量E、泊松比m 和热膨胀系数a )的温度相关性对挠度的影响规律及温度场与横载联合对圆板大挠度的作用机制。本文的理论结果与数值模拟结果定量一致，并与文献中相关的理论和实验结果定性一致。Abstract: The action mechanism of both laser-induced temperature rise and lateral force on the large deflections of a clamped circular plate subjected to combined CW laser and lateral force is analyzed and the results indicate that the gradient effects of thermo-softening and temperature moment are of quite importance. The theoretical and FEM results are in quantitatively accordance with each other and also in qualitatively agreement with pertinent theoretical and experimental ones in references.
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Key words:
- laser /
- circular plate /
- temperature-dependence /
- large deflection
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