| 空中爆炸载荷作用下铝合金圆板的反直观响应研究 |
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| 引用本文： | 吴桂英,李鑫,周稳.空中爆炸载荷作用下铝合金圆板的反直观响应研究[J].振动与冲击,2010,29(12):166-168. |
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| 作者姓名： | 吴桂英 李鑫 周稳 |
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| 作者单位： | 太原理工大学 理学院力学系，太原 030024 |
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| 基金项目： | 国家自然科学基金，山西省自然科学基金 |
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| 摘 要： | 采用有限元软件ANSYS/LS-DYNA对空中TNT炸药起爆后,在爆炸冲击波作用下铝合金圆板的动力响应进行了数值分析。研究中分别考虑了TNT质量、圆板尺寸、约束形式等因素对反直观行为的影响,得到了产生反直观动力响应的不稳定区域。分析结果表明:爆炸载荷作用下,炸药只有在一定的比距离范围内,圆板才能产生反直观响应;圆板在向载荷反向运动过程中的再次塑性耗散将使板没有足够的能量再次跳回到正方向,从而发生反直观响应;圆板厚度的增加将使其更难产生反直观动力响应;固支圆板与简支圆板在发生反直观响应时虽然变形模态有区别,但对于反直观行为发生时炸药所处的位置影响不大。
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| 关 键 词： | 反直观行为 爆炸载荷 弹塑性圆板 |
Anomalous response of the aluminum alloy circular plate subjected to air blast load |
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| WU Gui-ying,LI Xin,ZHOU Wen.Anomalous response of the aluminum alloy circular plate subjected to air blast load[J].Journal of Vibration and Shock,2010,29(12):166-168. |
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| Authors: | WU Gui-ying LI Xin ZHOU Wen |
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| Affiliation: | Department of science of Taiyuan University of Technology 030024 |
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| Abstract: | The paper investigates the dynamic response of an aluminum alloy circle plate under air blast with ANSYS/LS-DYNA. The thickness, diameter, boundary and the weight of TNT were considered for anomalous response of circular plate. The elastic-response and elastic-plastic response of the circle plate were analyzed by changing the distant between the detonation point and the plate. Found the instability region of anomalous response. The results show that the scaled standoff distance will stay at a small range when anomalous response occurred. The instability region of the anomalous response reduces with the increase of plate thickness. |
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| Keywords: | Anomalous response Explosion Elastic-plastic circular plate |
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