不同损伤模式下的单舷侧散货船舷侧板架极限能力研究

Research on Ultimate Capacity of Various Damaged Side Shell Panels of Single Side Shell Bulk Carriers

对单舷侧散货船板架因装卸货物等受损后的结构极限承载能力的影响进行了研究,采用非线性有限元软件ABAQUS,建立单舷侧散货船板架完整模型和4种损伤模型,进行了舷侧板架在垂向载荷、船体纵向载荷、以及包括剪切和侧向压力的组合载荷作用下的非线性有限元计算。结果表明,因1根肋骨与板材之间连接的不同损伤,导致了相邻的其他肋骨工作应力不同程度的增加,或多或少地削弱了板架的承载能力,尤其在组合载荷的作用下,当一根肋骨的脱焊长度达肋骨长度的2/3时,板架极限承载力可下降15%。

By means of the start-of-the-art non-linear finite element software ABAQUS, the research on the ultimate capacity of 4 damaged side shell panels models of single side shell bulk carriers was performed to investigate the influences on their ultimate capacities due to the damage by cargo handling under the combined loads of vertical force, longitudinal stresses induced by the hull girder bending moment, shear forces and lateral pressure. As can be seen from the result, the various damage modes of the end-disconnection between the side frame and shell plate will cause to increase the working stress of the neighboring side frames and more or less lead to reduce the capacity of the panel, in particularly, the most severe case is, if the length of the disconnection （or crack） goes up to 2/3 of the whole length of the side frame and under the combined load condition, the ultimate capacity will be even out of 15%.