李梓淇, 乐京霞, 冯硕秋. 滚装船车辆甲板局部强度分析与结构优化设计[J]. 中国舰船研究, 2024, 19(X): 1–9. doi: 10.19693/j.issn.1673-3185.03653
引用本文: 李梓淇, 乐京霞, 冯硕秋. 滚装船车辆甲板局部强度分析与结构优化设计[J]. 中国舰船研究, 2024, 19(X): 1–9. doi: 10.19693/j.issn.1673-3185.03653
LI Z, YUE J X, FENG S Q. Local strength analysis and structural optimization design of vehicle deck of Ro-Ro ship[J]. Chinese Journal of Ship Research, 2024, 19(X): 1–9 (in Chinese). doi: 10.19693/j.issn.1673-3185.03653
Citation: LI Z, YUE J X, FENG S Q. Local strength analysis and structural optimization design of vehicle deck of Ro-Ro ship[J]. Chinese Journal of Ship Research, 2024, 19(X): 1–9 (in Chinese). doi: 10.19693/j.issn.1673-3185.03653

滚装船车辆甲板局部强度分析与结构优化设计

Local strength analysis and structural optimization design of vehicle deck of Ro-Ro ship

  • 摘要:
    目的 针对某滚装船所装载特殊车辆的载荷特征及其最危险工况,提出车辆甲板结构轻量化设计方法及最优设计方案。
    方法 首先,采用有限元直接计算及参数化建模得到特殊车辆载荷作用下车辆甲板的危险工况;然后,基于混合整数序列二次规划(MISQP)算法,提出满足局部强度的车辆甲板结构轻量化设计方法;最后,针对某滚装船最危险装载工况,得到车辆甲板结构最优设计方案。
    结果 结果显示,所提优化设计方案较初始方案减重25.88%;车辆甲板的疲劳寿命循环次数为87 096次,局部强度稳定性和疲劳强度满足规范要求。
    结论 研究表明,合理布置车辆可显著减小结构的应力水平,优化甲板板厚是降低车辆甲板重量的最有效方案,所提轻量化设计方法可为同类型滚装船车辆甲板优化设计提供参考。

     

    Abstract:
    Objectives In this study, the lightweight design method and optimal design scheme of vehicle deck structure are proposed for the special vehicle load characteristics and its most hazardous working conditions loaded on a ro-ro ship.
    Methods Firstly, the hazardous working conditions of the vehicle deck under special vehicle loads were obtained by direct finite element calculation and parametric modeling. Secondly, based on the mixed-integer sequence quadratic programming (MISQP) algorithm, a lightweight design method for vehicle deck structure satisfying local strength is proposed. Finally, for the most dangerous loading condition of a ro-ro ship, the optimal design scheme of vehicle deck structure is obtained.
    Results The proposed optimized design scheme reduces weight by 25.88% compared with the initial scheme; the number of fatigue life cycles of the vehicle deck is 87096, and the local strength stability and fatigue strength meet the specification requirements.
    Conclusions The study shows that the reasonable arrangement of vehicles can significantly reduce the structural stress level; optimization of deck plate thickness is the most effective solution to reduce the weight of the vehicle deck. The proposed lightweight design method can provide a reference for the optimized design of a vehicle deck of the same type of ro-ro ship.

     

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