摘要
深水导管架型海洋平台,接近于柔型结构。平台顶部有很大的集中质量,平台腿柱和其它杆件所受轴力亦较大,在超过设计水平的荷载作用下,平台结构发生的变形也较大,已不再是弹性状态下的小变形。因此,在进行平台结构受力分析时,应计入几何非线性的影响。本文推导了空间粱单元的切线刚度矩阵的显式形式,采用荷载增量法求解非线性方程组,利用所编制的程序,对平台进行分析,充分论证了几何非线性影响是不能忽视的。
The offshore conductor platform of deep water is almost the flexible structure. The concentrated mass tops the platform, and the legs and bracings arc stressed with significant axial force. Under the loads exceeding the design capacity the deformation of the platform structure is comparatively great and not small in elastic state. Therefore the geometrically nonlinear effect must be included in the analysis of the platform structure stress. This paper deducts the apparent form of the tangent stiffness matrix of the space beam elements, analyzes the platform by means of programming and load incrcasement method to solve the non-linear equation group, and testifies fully that the geometrically non-linear effect cannot be neglected.
出处
《中国海上油气（工程）》
1992年第4期15-22,共8页
China Offshore Oil and Gas
关键词
深水海洋平台
几何非线性
影响
offshore platform of deep water, geometrically non-linear effect, load iucreasement method
