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- Title
勐岗河大型悬索跨越管道成桥状态下非线性静力有限元分析.
- Authors
彭 阳; 安建川; 李 明; 余 进; 李长俊
- Abstract
The Menggang River suspension cable crossing pipeline of the natural gas pipeline engineering from Chuxiong of Yunnan to Panzhihua of Sichuan is erected directly across the river, so the deformation and stress induced in the process of pigging shall not be ignored. In order to clarify the initial conditions of pigging dynamic response characteristics, it is necessary to perform finite element analysis on the nonlinear static force under the finished state of bridge. In this paper, a 1 ∶ 1 simulation model was firstly established based on the ANSYS Workbench software. Then, the stresses in different sections of the crossing structure under its own gravity load at a certain arch height were analyzed. Finally, by applying different static loads on the crossing line pipe, the stress and displacement of the line pipe were calculated and checked. And the following research results were obtained. First, the stress and displacement of the established simulation model of crossing structure with a certain arch height under its own gravity are lower than the allowable value, and the deviation from the field test data is smaller. Second, the maximum stress position of the line pipe under the working condition of pressure test appears at the beginning of the arch at the south bank bridge deck rather than at the center of the pipe. Third, with the increase of the applied load, the maximum stress and the displacement of the line pipe increase, but the overall displacement changes less and the stress first reaches the allowable stress value. Fourth, due to the influence of arch height, the displacement change of each part and the position of the ultimate stress of the crossing line pipe under external load have particularity. In conclusion, the research results lay a foundation for the subsequent researches on the pigging dynamic response of the same type of crossing structures.
- Subjects
YUNNAN Sheng (China); SICHUAN Sheng (China); ARCHES; FINITE element method; DEAD loads (Mechanics); GAS engineering; NONLINEAR analysis; BRIDGE floors; NATURAL gas pipelines; PIPELINES
- Publication
Natural Gas Industry, 2020, Vol 40, Issue 1, p125
- ISSN
1000-0976
- Publication type
Article
- DOI
10.3787/j.issn.1000-0976.2020.01.017