CAJ | 학술논문

目前,船舶构件之间主要由传统的三角形肘板连接,这种肘板易在构件与肘板的连接处造成应力集中.提出一种肘板拓扑优化的设计方法,采用子模型技术对船舶肘板节点结构进行应力分布精细化分析,以肘板材料的分布作为设计变量,考虑肘板连接的桁材应力约束,极小化肘板与桁材连接部位的应力,对船舶典型节点肘板结构进行拓扑优化.在对肘板拓扑优化结果进行适当的工程化处理后,提出一种新的肘板结构型式.计算结果表明,相对于传统的三角形肘板,新型肘板结构有效降低了节点应力集中,可为此类结构的强度分析与优化设计提供有益的参考.
목전,선박구건지간주요유전통적삼각형주판련접,저충주판역재구건여주판적련접처조성응력집중.제출일충주판탁복우화적설계방법,채용자모형기술대선박주판절점결구진행응력분포정세화분석,이주판재료적분포작위설계변량,고필주판련접적항재응력약속,겁소화주판여항재련접부위적응력,대선박전형절점주판결구진행탁복우화.재대주판탁복우화결과진행괄당적공정화처리후,제출일충신적주판결구형식.계산결과표명,상대우전통적삼각형주판,신형주판결구유효강저료절점응력집중,가위차류결구적강도분석여우화설계제공유익적삼고.
Ship structures are conventionally connected by typical triangular brackets, which could cause stress concentration at the connections between ship structures and the bracket. In this paper, a new design method of brackets is proposed, where sub-modeling technologies are employed to conduct the refinement stress analysis of the brackets, while the topology optimization is applied to improve the stress concentra-tion. In this study, the material distribution of the bracket is chosen as the design variable, and the stress of the girder close to the bracket is considered as the constraints, while the stress of the connections between the bracket and the girders is considered as the objective. A new type of bracket structure is proposed once the proper engineering treatment is applied to the topology optimization results of the bracket. The opti-mized bracket's stress concentration is seen to improve greatly. In brief, the presented method may provide reference for the strength analysis and optimum design of similar structures.