Multi-field coupling dynamic response analysis of pipelines with double corrosion defects under seismic loading in cold regions

Journal of Vibroengineering

卷:20

Min Luo¹  Li Xin Wei²  Qiao Zhen Li²  Yang Liu² 

[1] College of Mechanical Science and Engineering, Northeast Petroleum University, Daqing, China;

[2] School of Petroleum Engineering, Northeast Petroleum University, Daqing, China;

关键词: corroded pipelines;    cold regions;    seismic loading;    multi-field coupling;    influence factors;   

DOI  :  10.21595/jve.2018.19300

来源: DOAJ

【 摘 要 】

Multi-field coupling system in the paper is composed of the corroded pipelines, fluid, heat preservation layers and frost -heaving soil, and the buried pipelines are inevitable to be affected by earthquakes, but few studies have been done on corroded pipelines in multi-field coupling under seismic loading in cold regions. The paper analyzes the dynamic response of the pipelines under seismic loading. Method by FEM (finite element method), the three-dimensional multi-field coupling mechanics model has been established for analysis, based on a thermal-fluid-solid multi-field coupling analysis theory, considering the actual stress-strain characteristics of the pipeline steel and the frost heaving force of soil. Meanwhile, the influences of fluid pressure, fluid temperature, corrosion defects and seismic waves on the mechanical properties of the pipelines are then discussed. The results show that: the relative corrosion depth, fluid pressure and fluid temperature have obvious influence on the mechanical properties of corroded pipelines; other factors are relatively weak; the properties of corroded pipelines do not change with different seismic loading. For the corroded pipelines in cold regions, the factors which have obvious influence on the mechanical properties of pipelines should be monitored intensely.

【 授权许可】

Unknown