自升式平台的局部结构应力分析

Local Stress Analysis of a Jack-up Structure

利用有限元法对自升式海洋平台纵舱壁和横舱壁上开孔前后的应力进行计算,分析开孔形状及开孔处采用不同的加强方式对局部结构应力的影响,计算得到开孔不同形状及不同加强方式时结构的应力。在平台主体舱壁上开圆角矩形时应力较小,在开孔上增加面板可以显著降低孔边缘的应力。平台桩腿开孔时应力集中系数急剧增加,桩腿载荷不同对桩腿受力有很大影响。

The stresses on the bulkheads of a jack-up platform which are with or without holes were calculated by finite ele-ment method.The influence of the hole shape and the strengthen methods on the local structure stresses was evaluated .The results showed that the shape and the strengthen methods can influence the stress of the structure .The stresses are lower when the shape of the hole is rectangle with arc transition at the corners .When the panel is added on the hole , the stress can be lower .The stress concentration factor will rise quickly when holes are on the pile , and the loads of the pile can also influence the stresses of the pile .