| 海底管线水平向整体屈曲及失效判断方法研究 |
| |
| 引用本文： | 刘润,洪兆徽,刘文彬.海底管线水平向整体屈曲及失效判断方法研究[J].海洋工程,2015,33(6):1-9. |
| |
| 作者姓名： | 刘润 洪兆徽 刘文彬 |
| |
| 作者单位： | 天津大学 水利工程仿真与安全国家重点试验室，天津 300072;天津大学 水利工程仿真与安全国家重点试验室，天津 300072;天津大学 水利工程仿真与安全国家重点试验室，天津 300072 |
| |
| 基金项目： | 国家重点基础研究发展计划（2014CB046800）；国家自然科学基金优秀青年基金（51322904）；高等学校博士学科点专项科研基金资助课题（20130032110074） |
| |
| 摘 要： | 海底管线是海洋石油的重要输运手段。为满足输送工艺的需要,正常工作条件下管线往往被施加较高的温度和压强,高温高压使管线内产生附加应力,当附加应力大于土体对管线的约束力时,管线就会发生整体屈曲。过度的水平向整体屈曲会导致截面产生较大的弯曲应力和压缩应变,对管线系统的安全运行造成威胁,因此需要对发生水平向整体屈曲后的管线进行验算。采用解析解法、规范法和有限元法对管线的整体屈曲进行分析,提出了应用临界屈曲荷载值域空间和值域下限来判断不同缺陷大小下管线是否发生水平向整体屈曲的方法。结合工程实例,分别采用内力控制标准和位移控制标准对管线水平向整体屈曲后是否失效进行了验算。研究指出,相较于位移标准,内力控制标准更为严格。
|
| 关 键 词： | 海底管线 水平向整体屈曲 临界屈曲判断 屈曲失效判断 |
Study on submarine pipeline lateral global buckling and buckling failure criterion |
| |
| LIU Run,HONG Zhaohui and LIU Wenbin.Study on submarine pipeline lateral global buckling and buckling failure criterion[J].Ocean Engineering,2015,33(6):1-9. |
| |
| Authors: | LIU Run HONG Zhaohui and LIU Wenbin |
| |
| Institution: | State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300072, China;State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300072, China;State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300072, China |
| |
| Abstract: | Submarine pipeline is an important way for offshore oil transportation. In operation, pipelines are usually applied under high temperature and high pressure to meet the needs of transport process, and the combined effect of high temperature and high pressure will cause additional stress in pipelines. When the additional stress is greater than the resisting force due to the soil around pipelines, it induces global buckling. Uncontrolled deformation leads to excessive bending which threatens the safety of pipeline system. It is important to ensure that the limit states of pipeline section are not exceeded. This paper analyzes pipeline global buckling with three kinds of methods: analytical method, specification method and numerical method. The critical buckling force of pipelines with different imperfections is calculated and the critical force range is proposed to evaluate the buckling. This study also checks the limit state of a post-buckling pipeline on the basis of the design parameter of a case with Det Norske Veritas codes. The applicability of the criterion load control and that of displacement control is discussed as well. Results show that the load control criterion is stricter than the displacement control criterion. |
| |
| Keywords: | submarine pipeline lateral global buckling critical buckling judgment post-buckling check |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《海洋工程》浏览原始摘要信息 |
| 点击此处可从《海洋工程》下载免费的PDF全文 |
|
