CAJ | 학술논문

复杂的交变载荷、特殊的结构形式和高强度钢的大量使用使小水线面双体船连接桥结构的疲劳强度问题尤为突出。针对此问题，研究在整船有限元分析的基础上，采用子模型法对 SWATH 船支柱体高应力集中区域的典型节点进行基于 Miner 线性累积损伤理论和 Weibull 分布连续模型的疲劳强度分析。并通过有限元分析软件 Ansys及其参数化编译语言 APDL 建立该典型节点的参数化子模型，结合以表征结构疲劳寿命的累积损伤度和影响疲劳强度的形状和尺寸参数建立的优化模型进行优化设计研究。算例结果表明，该方法能够在提高结构疲劳强度的情况下，提出结构重量较轻的节点形状和尺寸方案，为此类结构的抗疲劳设计提供参考。
복잡적교변재하、특수적결구형식화고강도강적대량사용사소수선면쌍체선련접교결구적피로강도문제우위돌출。침대차문제，연구재정선유한원분석적기출상，채용자모형법대 SWATH 선지주체고응력집중구역적전형절점진행기우 Miner 선성루적손상이론화 Weibull 분포련속모형적피로강도분석。병통과유한원분석연건 Ansys급기삼수화편역어언 APDL 건립해전형절점적삼수화자모형，결합이표정결구피로수명적루적손상도화영향피로강도적형상화척촌삼수건립적우화모형진행우화설계연구。산례결과표명，해방법능구재제고결구피로강도적정황하，제출결구중량교경적절점형상화척촌방안，위차류결구적항피로설계제공삼고。
Complex alternating load, special structural form and extensive use of high-strength steels cause serious fatigue strength problems of typical details of small waterplane area twin hull ship(SWATH). For this issue, the study based on finite element(FEM) structural strength analysis result of one SWATH complete model, and used sub-model method to analyze fatigue strength of high stress concentration area of SWATH pillar structure. Miner linear cumulative damage theory and Weibull distribution model was used in fatigue strength analysis. Combined with FEM software Ansys and Ansys parametric design language (APDL), parametric sub-model of the typical detail and optimization modelwere built by cumulative damage degree and shape and size parameters of the structure to study optimization design. Results of the examples show that this method could provide high fatigue strength and light structural weight design scheme of typical detail′s shape and size, and offered conference in SWATH structure anti-fatigue design.