Paper
Freeze-thaw Mechanism of Frost-soil Bed around Shallow-buried Oil-pipeline in Cold-region
- Authors:
- Wang Yu; Tang Bo; Li Nansheng
- Abstract
- This paper deals with a two-dimensional temperature field with phase-changing procedure and stress distribution of shallow-buried oil pipelines and corresponding heat engineering parameters in seasonally frozen ground regions under severe climate condition. While freezing-thawing soil is constructed as foundation of oil pipelines, it is significant to take into account its special thermal, mechanical properties and behavior, to apply loads and temperature change of frost soil will often lead to irreversible restructure of the system, causing thermal-stress relaxation and creep deformation. Namely, the strength and deformation of freezing-thawing soil certainly change with ambient temperature-fluctuation, which will greatly affect oil-pipeline’s safety and stability, the oil-pipelines deformed in an impermissible way under some situations, and finally damage the oil-pipelines. Through detailed deduction of the computational equations and by use of the commercial finite element software (ANSYS), we arrive at some helpful and instructive results.
- Keywords
- oil pipeline in cold region;phase change temperature field;ansys;coupling thermal-stress;freeze-thaw security
- StartPage
- 68
- EndPage
- 74
- Doi