| 变刚度楔形体板架落体砰击试验研究 |
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| 引用本文： | 莫立新,王辉,蒋彩霞,徐春.变刚度楔形体板架落体砰击试验研究[J].船舶力学,2011,15(4):394-401. |
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| 作者姓名： | 莫立新 王辉 蒋彩霞 徐春 |
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| 作者单位： | 大连理工大学船舶工程学院,辽宁,大连,116024;中国船舶科学研究中心,江苏,无锡,214082 |
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| 摘 要： | 通过对具有四种刚度的两个二维楔形体板架的自由落体试验,测量模型入水速度、砰击压力和结构响应,获得模型底部板架在砰击载荷作用下的响应特征;对结构模型在均布静压力作用下的应力响应进行结构力学分析;比较试验和计算得到的应力响应,获得作用在模型肋骨上的砰击压力的折减系数,从而使该结构在设计时仍可按常规的静力计算方法进行强度校核。通过试验,深入研究了折减系数与结构刚度的关系,并指出在船体局部结构设计中应充分注意刚度变化对折减系数的影响。
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| 关 键 词： | 砰击压力 折减系数 结构刚度 结构响应 |
Study on dropping test of wedge grillages with various types of stiffeness |
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| MO Li-xin,WANG Hui,JIANG Cai-xia,XU Chun.Study on dropping test of wedge grillages with various types of stiffeness[J].Journal of Ship Mechanics,2011,15(4):394-401. |
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| Authors: | MO Li-xin WANG Hui JIANG Cai-xia XU Chun |
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| Institution: | MO Li-xin1,WANG Hui2,JIANG Cai-xia 2,XU Chun2(1 Department of Naval Architecture,Dalian University of Technology,Dalian 116024,China,2 China Ship Scientific Research Center,Wuxi 214082,China) |
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| Abstract: | Two-dimensional wedge model drop tests with four types of stiffeness were carried out to investigate slamming phenomena in different drop heights.The water-entry velocities of the model,slamming pressures on the bottom and the resultant dynamic strains in the structures were recorded and the characteristics of the loads and structural responses were analyzed.To deduce design pressures for the frame structures,structural responses of the model under evenly distributed static pressures were calculated using t... |
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| Keywords: | slamming pressure reduction factor structural stiffeness structural responses |
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