| 王浩, 李昊, 刘俊, 曾佳.重型破冰船冰区加强结构剩余强度分析方法研究[J].海洋工程,2025,(6):188~194 |
| 重型破冰船冰区加强结构剩余强度分析方法研究 |
| Research on analysis method for residual strength of ice-strengthening structure in heavy icebreaker |
| 投稿时间：2024-09-19 |
| DOI：10.16483/j.issn.1005-9865.2025.06.018 |
| 中文关键词: 重型破冰船 冰致损伤 冰区加强结构 剩余强度 非线性分析 |
| 英文关键词:heavy icebreaker ice-induced damage ice-strengthening structure residual strength nonlinear analysis |
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| 中文摘要: |
| 重型破冰船在遭遇超设计冰载后冰区加强结构会发生一定程度的冰致损伤，需要评估冰区加强结构发生初始损伤后的剩余强度，目前各大船级社制定的冰载荷作用下冰级船舶冰区加强结构强度评估方法差异较大，且对重型破冰船适用性不强。通过对冰区加强结构典型冰致损伤模式及引入方法开展研究，提出了具有冰致损伤的冰区加强结构剩余强度非线性直接分析方法，以某横骨架式重型破冰船艏部位冰区加强结构作为研究对象，应用该方法分别计算具有永久变形和初始破损的冰区加强结构剩余强度，并与试验结果进行对比。结果表明：通过数值模拟和模型试验计算得到的冰区加强结构剩余强度误差在5%以内，载荷-变形曲线贴近，压溃后的模型破坏形式相似，验证了所提出方法的适用性。研究成果可为重型破冰船的结构设计提供参考。 |
| 英文摘要: |
| The ice-strengthening structures of a heavy icebreaker may experience varying degrees of ice-induced damage after encountering ice loads beyond design conditions. It is essential to evaluate the residual strength of such structures after initial damage. Currently, the assessment methods developed by major classification societies for evaluating the strength of ice-strengthening structures under ice loads differ significantly and are generally unsuitable for heavy icebreakers. This study proposes a nonlinear direct analysis method for evaluating the residual strength of ice-strengthening structures with ice-induced damage, based on an investigation of typical damage modes and their introduction methods. Using the bow region of a transverse-frame heavy icebreaker as a case study, the method is applied to calculate the residual strength of structures with permanent deformation and initial breakage, and results are compared with experimental data. The findings show that the discrepancy between numerical simulation and model testing results is within 5%, with close agreement in load-deformation curves and similar failure patterns after collapse, thereby validating the applicability of the proposed method. The research provides a useful reference for structural design of heavy icebreakers. |
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