| 激光辐照下圆柱壳结构的稳定性分析 |
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| 引用本文： | 沈敏敬,龙连春,陈兴华,阳志光.激光辐照下圆柱壳结构的稳定性分析[J].计算力学学报,2008,25(Z1). |
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| 作者姓名： | 沈敏敬 龙连春 陈兴华 阳志光 |
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| 作者单位： | 北京工业大学机电学院;北京宇航系统工程研究所; |
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| 基金项目： | 天津市工程力学重点实验室资助项目
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| 摘 要： | 针对航天工程中常用的承受轴压作用的薄壁圆柱壳,分别采用解析方法与特征值屈曲有限元方法分析了圆柱壳结构在均匀轴压作用下的稳定性能,得到了屈曲承载力.并进行了对比,验证了有限元模型的合理性.采用线性屈曲特征值有限元方法分析了强激光辐照作用下圆柱壳的稳定性能,分析表明激光辐照导致壳体局部温度上升并由此带来材料参数的改变,是因为激光辐照在壳体中引起了热应力与热应变,使轴压圆柱壳的屈曲承载力明显降低.论文还着重对加筋圆柱壳结构的稳定性进行了研究,数值分析结果表明,加筋能有效提高圆柱壳结构的抗压承载力,激光辐照作用下,加筋对轴压作用下圆柱壳的屈曲承载力的提高作用更为明显.
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| 关 键 词： | 激光辐照 稳定性 屈曲载荷 加筋圆柱壳 |
Buckling analysis of cylindrical shell under laser irradiation |
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| SHEN Min-jing,LONG Lian-chun,CHEN Xing-hua,YANG Zhi-guang.Buckling analysis of cylindrical shell under laser irradiation[J].Chinese Journal of Computational Mechanics,2008,25(Z1). |
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| Authors: | SHEN Min-jing LONG Lian-chun CHEN Xing-hua YANG Zhi-guang |
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| Institution: | 1.College of Mechanical Engineering and Applied Electric Technology;Beijing University of Technology;Beijing 100124;China;2.Engineering Institute of Aerospace System;Beijing 100076;China |
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| Abstract: | Considering compressed thin wall cylindrical shell structures widely used in aerospace engineering,analytic method and eigenvalue buckling finite element method are applied in the paper to analyze the stability of cylindrical shell structure under uniform axial compression,and the critical buckling loads respectively are obtained and contrasted to conclude that the finite element model is reasonable.Linear buckling eigenvalue finite element method is also employed to analyze the stability of cylindrical she... |
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| Keywords: | laser irradiation stability buckling load stiffened cylindrical shell |
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