为了合理地评估铝合金船体结构的疲劳强度，开展5083铝合金船体结构典型节点设计，并完成类标准试样和实尺度试样2种结构形式的疲劳试验。基于类标准试样试验结果得到纵向焊缝典型节点P-S-N曲线，并与IIW规范进行比较，试验所得曲线与规范曲线疲劳寿命预测结果相差4.32%；基于实尺度试样试验结果对规范曲线选取的合理性进行验证，为铝合金材料船体结构疲劳强度评估提供参考。
In order to provide a reasonable assessment for the fatigue strength of ship hull structures built up by aluminum alloy, typical welded joints of 5083 aluminum alloy ship structures are designed, and fatigue tests are performed on the two kinds of specimens, standard specimens and full-scale specimens respectively. Based on the fatigue test outcomes of the standard specimens, representative P-S-N curves are established specifically for longitudinal weld joints. A comparative analysis is then undertaken against the International Institute of Welding (IIW) standard, revealing a marginal 4.32% disparity between the experimental and standard curve fatigue life predictions. Furthermore, the fatigue test results obtained from full-scale specimens served as a crucial validation tool, substantiating the rationality of the chosen standard curve. This validation process contributes valuable insights to the assessment of fatigue strength in aluminum alloy ship structures within the broader scope of structural integrity analysis.
2024,46(18): 29-34 收稿日期：2021-12-11
DOI：10.3404/j.issn.1672-7649.2024.18.005
分类号：U661.43
基金项目：国家重点研发计划资助项目（2024YFE0104300 ）；国家自然科学基金青年项目（52001284，52192694）；江苏省自然科学基金青年项目（BK20200166）
作者简介：王艺陶(1987-),女,博士,高级工程师,研究方向为船舶与海洋结构疲劳性能与安全性
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