本文介绍了导管架式平台地震响应分析的反应谱法基本原理以及采用反应谱法进行地震响应分析的工况和流程,以此为基础对一型导管架式海上换流站开展地震响应分析。根据地质参数计算土壤特性曲线,定义出桩-土之间的非线性边界条件。通过迭代将非线性桩-土边界条件线性化为等效弹簧单元,各阶振型与地震加速度谱结合得出地震动力载荷,与静水浮力和重力形成组合载荷,进行有限元分析,校核杆件结构强度和节点冲剪强度。计算结果表明,地震工况有可能是比操作工况和极端风暴工况更危险的主要控制工况,因此对导管架式平台必须开展地震响应分析。
This article introduces the basic principles of the response spectrum method for seismic response analysis of jacket platform, as well as the load conditions and processes of using the response spectrum method for seismic response analysis. Based on this, seismic response analysis was carried out on a type of jacket offshore converter station. Calculate the soil characteristic curves based on geological parameters and define the nonlinear boundary conditions between piles and soil. By iteratively linearizing the nonlinear pile-soil boundary conditions into equivalent spring elements, the seismic dynamic loads are obtained by combining each mode of vibration with the seismic acceleration spectrum, and combined with static buoyancy and gravity to form a combined load for finite element analysis, verifying the structural strength of the members and the impact shear strength of the nodes. The calculation results indicate that seismic conditions may be the main control conditions more dangerous than operating conditions and extreme storm conditions, therefore, seismic response analysis must be carried out for platforms of the jacket type.
2025,47(11): 81-86 收稿日期:2024-7-12
DOI:10.3404/j.issn.1672-7649.2025.11.014
分类号:TB122
基金项目:科技部国家重点研发计划项目(2021YFB2400600)
作者简介:石强(1978-),男,博士,研究员级高级工程师,研究方向为海洋工程设计分析
参考文献:
[1] 熊根, 梁富胜, 李欣, 等. 大型海上换流站运输及浮托安装数值分析和风险研究[J]. 海洋工程装备与技术, 2023, 10(3): 1-12.
[2] 应续华. 强震作用下导管架平台倒塌安全储备研究[D]. 大连: 大连理工大学, 2015.
[3] 刘红兵, 陈国明, 朱本瑞, 等. 基于能力谱法导管架平台抗震性能评估[J]. 中国石油大学学报, 2015, 39(5): 124-129.
[4] 付殿福, 邵卫东, 王忠畅. 渤海固定平台非线性时程地震的抗震设计[J]. 船海工程, 2021, 50(1): 107-111.
[5] 王秀勇, 肖熙, 张世联. 海洋平台地震响应分析[J]. 中国海洋平台, 1997, 12(4): 150-152.
[6] DNV船级社. SESAM USER MANUAL-Framework[M]. Norway: Det Norske Veritas, 2020.
[7] API. Recommended practice for planning, designing and constructing fixed offshoreplatforms–Working Stress Design[S]. USA: API, 2010.
[8] 邵卫东, 侯金林, 王丽勤, 等. 基于结构非线性的导管架平台地震韧性分析[J]. 中国海上油气, 2016, 28(4): 125-131.
[9] DNV船级社. SESAM WORKSHOP-Jacket Analysis[M]. Norway: Det Norske Veritas, 2017.
[10] 《海洋石油工程设计指南》编委会. 海洋石油工程平台结构设计[M]. 北京: 石油工业出版社, 2007.
[11] 张学言. 确定弹性桩嵌固点深度的方法[J]. 水运工程, 1980: 19-23.
[12] 魏亚菲, 陈长青. 基于响应谱法的海洋平台地震分析研究[J]. 装备制造技术, 2023(2): 112-115.
[13] 丛军. 导管架平台地震响应谱分析[J]. 科技创新导报, 2013(17): 222-223.