| 海洋结构薄板承载性能的裂纹群体效应 |
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| 引用本文： | 张剑利,王昊,方辉.海洋结构薄板承载性能的裂纹群体效应[J].海洋工程,2018,36(3):76-83. |
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| 作者姓名： | 张剑利 王昊 方辉 |
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| 作者单位： | 海洋石油工程(青岛)有限公司;中国海洋大学工程学院山东省海洋工程重点实验室 |
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| 基金项目： | 国家自然科学基金（11572300）；山东省重点研发计划（2017GHY15120） |
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| 摘 要： | 大型海洋结构长期服役中构件裂纹不可避免,结构承载性能必然随之弱化。针对含非均匀分布裂纹的薄板,以有限元方法对小变形状态下其极限承载能力进行计算,得到裂纹数量、长度、分布等因素对薄板屈曲临界应力的影响规律。发现裂纹不仅改变截面的有效承载面积,同时改变局部结构的变形状态,多种因素共同作用使板的承载性能非单调变化,即多裂纹对板承载性能的影响具有一定的"群体"效应。
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| 关 键 词： | 海洋结构 含裂纹板 群体效应 屈曲极限 薄板 承载力 |
A computational investigation of the group effect of cracks on the buckling strength of steel plates |
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| ZHANG Jianli,WANG Hao and FANG Hui.A computational investigation of the group effect of cracks on the buckling strength of steel plates[J].Ocean Engineering,2018,36(3):76-83. |
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| Authors: | ZHANG Jianli WANG Hao and FANG Hui |
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| Institution: | Offshore Oil Engineering (Qingdao) Co., Ltd., Qingdao 266520, China,Institute of Coastal and Offshore Engineering, School of Engineering, Ocean University of China, Qingdao 266100, China and Institute of Coastal and Offshore Engineering, School of Engineering, Ocean University of China, Qingdao 266100, China |
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| Abstract: | The present study is focused on assessing the group effect of cracks on the buckling strength of the marine structural plates of various slenderness with clamped edges and subjected to uniaxial compression. Different damage patterns are investigated. By the combination of several factors, including the number and distribution of cracks, hundreds of FEA have been carried out. It is concluded that the damaged condition, defined as group effect of cracks, manipulates the deformation state and loading capacity of the steel plate in the buckling mode, which coincides with the proportion of effective loading area and section. |
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| Keywords: | marine structure group effect multiple cracks buckling strength sheet bearing capacity |
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