﻿ 第七代钻井平台典型撑杆结构极限强度研究
 舰船科学技术  2020, Vol. 42 Issue (10): 94-97    DOI: 10.3404/j.issn.1672-7649.2020.10.019 PDF

Research on ultimate strength of struct of seventh generation drilling platform
ZHAO Nan, ZHU Yi-feng, LI Zheng-jie
China Ship Scientific Research Center, Wuxi 214082, China
Abstract: Based on the similarity principle of ultimate strength model test under compression load, this paper takes the strut structure of the seventh generation drilling platform as the research object, carries out the ultimate strength test model design of the strut structure, and completes the model test. By carrying out the linear state structure model test, the residual stress of structure welding is released, and then the limit state model test is carried out to obtain the stress distribution, failure mode and limit load of strut structure. Through the research of this paper, it provides support for the optimization design of the strut structure of the seventh generation drilling platform.
Key words: seventh generation drilling platform     struct     ultimate strength     model test     numerical simulation
0 引　言

1 试验对象

 图 1 模型试验区域及有限元结构 Fig. 1 Test area and finite element model of column prototype

 图 2 撑杆原型有限元模型 Fig. 2 Finite element model of struct
2 相似关系

 $\frac{{{F_s}}}{{{F_m}}} = \lambda \cdot \lambda \text{。}$ (1)

3 试验模型设计

 图 3 原型结构数值仿真计算模型 Fig. 3 Finite element model of prototype

 图 4 原型结构数值仿真计算模型极限状态 Fig. 4 Limit state stress tensor of prototype

 图 5 简化后试验模型 Fig. 5 Simplied model

 图 6 简化后试验模型极限状态计算结果 Fig. 6 Limit state stress tensor of simiplied model

 图 7 撑杆原型极限状态失效模式 Fig. 7 Limit state stress tensor of struct prototype

 图 8 简化模型极限状态失效模式 Fig. 8 Limit state stress tensor of simplied model

 图 9 载荷-位移曲线 Fig. 9 Load-displacement curve
4 测量系统和测点布置

 图 10 应变测点位置 Fig. 10 Location of measure points
5 试验数据处理分析 5.1 压缩载荷作用下弹性范围内模型试验

 图 11 弹性状态载荷应变曲线 Fig. 11 Load-strain curve of elastic state
5.2 压缩载荷作用下模型极限强度试验

 图 12 极限状态失效模式 Fig. 12 Collaspe mode of limit state

 图 13 载荷-位移曲线 Fig. 13 Load-displacement curve
6 试验模型仿真计算分析

 图 14 仿真计算失效模式 Fig. 14 Collpase mode of numerical simulation

 图 15 载荷-位移曲线 Fig. 15 Load-dislpacement curve
7 结　语

1）本文根据相似关系进行的模型设计合理；

2）通过弹性范围内模型试验可以发现，模型的应变为线性状态；

3）通过极限强度模型试验可以看出，整个结构的失效是由撑杆结构失效所引起的；

4）本文的分析方法可为我国第七代钻井平台撑杆结构设计优化等提供技术支撑。

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