深海采矿钢结构塔架及底座平台的稳定性分析

Stability Analysis of Steel Structure Tower and Base Platform for Deep-sea Mining

深海采矿布放回收作业的负载大、重复性高、作业速度快、易受波浪和风力影响,可能造成钢结构塔架和底座平台的失稳。根据其工作特点,选取钢结构塔架和底座平台的三个典型截面,参照GB50017-2003《钢结构设计规范》,分别进行整体稳定性理论折算计算、特征值(线性)屈曲和非线性屈曲有限元分析。结果表明,钢结构塔架和底座平台的整体结构稳定性较好,不会发生整体失稳。计算分析得到的临界屈曲载荷值/屈曲极限载荷值可为深海采矿的钢结构塔架和底座平台的结构设计和载荷选取提供技术借鉴和工程经验。

The layout and recovery operation of deep-sea mining has characteristics of large load,high repeatability and fast operation speed,easy to be affected by wave and wind,which may cause instability of steel structure tower and base platform.Based on the national standard GB50017-2003"Code for design of steel structures",the overall stability theory conversion calculation,eigenvalue(linear)buckling and nonlinear buckling finite element analysis were performed on the three typical sections of the steel structure tower and the base platform selected according to the working characteristics.The results show that the overall structural stability of the steel structure tower and base platform is good.The critical buckling load value/buckling limit load value obtained by calculation and analysis will provide technical reference and engineering experience for the structural design and load selection of steel structure tower and base platform in deep-sea mining.