CAJ | 학술논문

提出了基于有限元软件ANSYS的激光焊接钢质夹层甲板板格结构强度计算的子模型方法。分别对考虑激光焊接焊缝缺陷的I型夹层板格结构的壳单元计算模型和体单元子模型进行强度分析，并与全部体单元模型的芯层与上下面板连接处及面板中部处应力分布计算结果进行对比，验证壳单元计算模型和子模型方法用于计算夹层甲板板格强度的正确性。计算结果表明，对强度特征关注区域，可建立多个体单元子模型，确定子模型边界影响区域范围，从而可较为准确地评估夹层甲板板格结构强度特性，包括焊缝处应力分布。壳单元计算模型可获得较为精确的板格变形值，但无法考虑激光焊接焊缝缺陷，获得的焊缝处最大应力值明显偏小。
제출료기우유한원연건ANSYS적격광한접강질협층갑판판격결구강도계산적자모형방법。분별대고필격광한접한봉결함적I형협층판격결구적각단원계산모형화체단원자모형진행강도분석，병여전부체단원모형적심층여상하면판련접처급면판중부처응력분포계산결과진행대비，험증각단원계산모형화자모형방법용우계산협층갑판판격강도적정학성。계산결과표명，대강도특정관주구역，가건립다개체단원자모형，학정자모형변계영향구역범위，종이가교위준학지평고협층갑판판격결구강도특성，포괄한봉처응력분포。각단원계산모형가획득교위정학적판격변형치，단무법고필격광한접한봉결함，획득적한봉처최대응력치명현편소。
This paper proposes sub-model method for calculating the strength of a laser-welded steel sand-wich panel structure by using commercial code ANSYS. The strength computations of the sandwich panel us-ing the all-shell model and sub-model are conducted respectively and the stress distributions at the con-nections between the core and upper (bottom) sheet and ones at central part by those two computational models are compared respectively with those obtained from the all-solid model to verify the correction of the all-shell model and the sub model. The results show that multiple sub models are necessary for deter-mining the accurate zones in which the stresses from the different sub models are same or closely similar. In this way, the accurate stresses of interested structure parts including the laser-welded defects can be ob-tained. The results also verify that the deformation of the panel obtained from the all-shell model is accept-able, however, the stresses at the laser-welded defects from the all-shell model are much less than those obtained from the all-solid model.