王晓强, 胡耀愚, 严仁军. 船舶典型节点弯曲载荷作用下极限强度试验研究[J]. 中国舰船研究, 2018, 13(4): 41-48. DOI: 10.19693/j.issn.1673-3185.01062
引用本文: 王晓强, 胡耀愚, 严仁军. 船舶典型节点弯曲载荷作用下极限强度试验研究[J]. 中国舰船研究, 2018, 13(4): 41-48. DOI: 10.19693/j.issn.1673-3185.01062
WANG Xiaoqiang, HU Yaoyu, YAN Renjun. Experimental study on ultimate strength of typical ship brackets under bending load[J]. Chinese Journal of Ship Research, 2018, 13(4): 41-48. DOI: 10.19693/j.issn.1673-3185.01062
Citation: WANG Xiaoqiang, HU Yaoyu, YAN Renjun. Experimental study on ultimate strength of typical ship brackets under bending load[J]. Chinese Journal of Ship Research, 2018, 13(4): 41-48. DOI: 10.19693/j.issn.1673-3185.01062

船舶典型节点弯曲载荷作用下极限强度试验研究

Experimental study on ultimate strength of typical ship brackets under bending load

  • 摘要:
      目的  船舶结构中的各构件是由节点连接在一起的,连接节点的力学性能对整船的极限强度影响很大。为了解节点的受力特性,
      方法  通过对不同节点型式的试件进行弯曲载荷下的极限强度试验,分别得到其载荷位移曲线、节点应力分布以及破坏形式,并分析各试件的极限强度与平均刚度特性。
      结果  结果表明:三角形肘板加强节点试件的极限强度大于圆弧形过渡加强节点试件,但其平均刚度比较大的圆弧试件小;在同等载荷条件下,三角形肘板加强节点处的峰值应力大于圆弧形过渡的加强节点试件;不同大小、相同节点形式试件的破坏形式相同,而大小相同、节点形式不同试件的破坏形式则差别很大;大小两组试件间的极限强度与平均刚度的变化规律一样,但变化的程度不一样。
      结论  所做的分析及试验结果可以指导优化船舶的节点设计。

     

    Abstract:
      Objectives  As ship structure members are mainly joined together by brackets, the mechanical properties of bracket joint have a great influence on the ultimate strength of the whole ship.
      Methods  Ultimate strength experiments under bending loads are carried out to have better understanding of the mechanical properties and ultimate loads of different brackets, thereby obtaining the load-displacement curves, stress distribution and damage phenomena of specimens with different brackets. Analyses of their ultimate strength and average stiffness are carried out.
      Results  It is observed that the ultimate strength of a triangle bracket specimen is greater than that of an arc bracket specimen, and the average stiffness of a triangle bracket specimen is lower than that of a larger arc bracket specimen. Under the same load, the peak stress of a triangle bracket is greater than that of an arc bracket; specimens with the same kind of bracket and different sizes have the same damage mode; however, different kinds of brackets contribute to varying damage modes even when they have the same size specimens; the ultimate strength and average stiffness between the two groups of specimens have the same changing rule and diverging changing degrees.
      Conclusions  The analysis and obtained results of this paper provide useful references for improving the design of ship brackets.

     

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