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 Ro-Ro ship's vehicle deck

作　　者：李梓淇 乐京霞[1] 冯硕秋 LI Ziqi;YUE Jingxia;FENG Shuoqiu(School of Naval Architecture,Ocean and Energy Power Engineering,Wuhan University of Technology,Wuhan 430063,China;Marine Design and Research Institute of China,Shanghai 200011,China)

机构地区：[1]武汉理工大学船海与能源动力工程学院,湖北武汉430063 [2]中国船舶及海洋工程设计研究院,上海200011

出　　处：《中国舰船研究》2024年第S02期81-89,共9页Chinese Journal of Ship Research

基　　金：国家自然科学基金资助项目(52171320)。

摘　　要：[目的]针对某滚装船所装载特殊车辆的载荷特征及最危险工况,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87096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。[Objective]In this study,a lightweight design method and optimal vehicle deck structure design scheme are proposed for a Ro-Ro ship based on the most hazardous working conditions under special vehicle load characteristics.[Methods]First,the hazardous working conditions of the vehicle deck under special vehicle loads are obtained by direct finite element calculation and parametric modeling.Second,based on the mixed-integer sequence quadratic programming algorithm,a lightweight design method for a vehicle deck structure that satisfies local strength is proposed.Finally,the optimal design scheme for the vehicle deck structure under the most dangerous loading conditions is obtained.[Results]The proposed optimal design scheme reduces the weight by 25.88%compared with the initial scheme,while 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 results of this study show that the reasonable arrangement of vehicles can significantly reduce the structural stress level of the vehicle deck,and the optimization of deck plate thickness is the most effective solution for reducing its weight.The proposed lightweight design method can provide useful references for the optimal design of vehicle decks for the same type of Ro-Ro ship.

关 键 词：车辆甲板 优化设计 混合整数序列二次规划算法 车辆载荷 疲劳寿命 

分 类 号：U661.43[交通运输工程—船舶及航道工程]