| 用光力学和有限元法确定钢壳的动态响应 |
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| 引用本文： | 佟景伟,王世斌,李鸿琦.用光力学和有限元法确定钢壳的动态响应[J].力学学报,1992,24(3):361-367. |
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| 作者姓名： | 佟景伟 王世斌 李鸿琦 |
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| 作者单位： | 天津大学力学系材料力学教研室,300072 |
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| 摘 要： | 本文提出了壳体在冲击载荷作用下三维位移分布的光力学方法的实验解和有限元数值解。采用一种新型的电磁脉冲加载装置,实现了对试件施加重复性很好的冲击载荷,利用测得的力一时间关系曲线作为外力边界条件,用逐步积分法对壳体在冲击载荷下的动态响应作了分析。光力学方法的实验解和有限元数值解吻合较好。
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| 关 键 词： | 光力学 有限元法 钢壳 动态响应 |
DETERMINATION OF DYNAMIC RESPONSE OF STEEL SHELL USING PHOTO-MECHANICS AND FINITE ELEMENTMETHODS |
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| Tong Jingwei Wang Shibin Li Hongqi.DETERMINATION OF DYNAMIC RESPONSE OF STEEL SHELL USING PHOTO-MECHANICS AND FINITE ELEMENTMETHODS[J].chinese journal of theoretical and applied mechanics,1992,24(3):361-367. |
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| Authors: | Tong Jingwei Wang Shibin Li Hongqi |
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| Abstract: | This paper presents a solution to the problem of three-dimensional dynamicdisplacement distributions on curved surface under impact loading utilizing photomechanics and finite element method.In-plane displacements (U', V) on the curved surface can be measured from the spectrum of far-field objective laser speckle by means of the pointwise filtering method. out-plane displacement w' of the shell surface can be obtained combining the Moire interferometry and above method.An impulse force was applied using a new type of electromagnetic forcing mechanism which gives a good repeatability. The relation of instantaneous loading and time which was set for the forcing boundary condition in the finite element calculation of displacement components was recorded experimentally.Two suitable external trigger mechanism were used to fire the Ruby-laser system at predetermined intervals.It is shown that the experimental results are in good agreement with those of finite element method. This mixed method is proved efficient. |
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| Keywords: | dynamic Moire imerferometry objective speckle impact loading step-by step method |
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