Finite element analysis of fluid-structure interaction in buried liquid-conveying pipeline

Abstract

Long distance buried liquid-conveying pipeline is inevitable to cross faults and under earthquake action, it is necessary to calculate fluid-structure interaction(FSI) in finite element analysis under pipe-soil interaction. Under multi-action of site, fault movement and earthquake, finite element model of buried liquid-conveying pipeline for the calculation of fluid structure interaction was constructed through combinative application of ADINA-parasolid and ADINA-native modeling methods, and the direct computing method of two-way fluid-structure coupling was introduced. The methods of solid and fluid modeling were analyzed, pipe-soil friction was defined in solid model, and special flow assumption and fluid structure interface condition were defined in fluid model. Earthquake load, gravity and displacement of fault movement were applied, also model preferences. Finite element research on the damage of buried liquid-conveying pipeline was carried out through computing fluid-structure coupling. The influences of pipe-soil friction coefficient, fault-pipe angle, and liquid density on axial stress of pipeline were analyzed, and optimum parameters were proposed for the protection of buried liquid-conveying pipeline.

Keywords

fluid-structure coupling / buried liquid-conveying pipeline / ADINA / finite element / faults / earthquake

References

[1] BatheK. J., HahnW.. On transient analysis of fluid-structure systems [J]. J Computers and Structures, 1978, 10(2): 383-391

[2] ZhangZ.-y., ShenR.-ying.. Fluid-structure interaction of the straight liquid-filled piping system [J]. Journal of Vibration Engineering, 2000, 13(3): 455-461

[3] ZhangZ.-y., ShenR.-y., WangQ.. The model analysis of the liquid-filled pipe system [J]. Chinese Journal of Solid Mechanics, 2001, 22(2): 143-149

[4] ZhangL.-x., HuangW.-hu.. Analysis of nonlinear dynamic stability of liquid-conveying pipes [J]. Applied Mathematics and Mechanics, 2002, 23(9): 951-960

[5] WangS.-z., YuS.-s., ZhaoY.. Solid-liquid coupling characteristics of fluid-conveying pipes [J]. Journal of Harbin Institute Technology, 2002, 34(2): 141-144

[6] SreejithB., JayarajK., GanesanN., et al.. Finite element analysis of fluid-structure interaction in pipeline systems [J]. Nuclear Engineering and Design, 2004, 227(3): 313-322

[7] ZhuQ.-j., LiuY.-l., JiangL.-z., et al.. Analysis of buried pipeline damage affected by pipe-soil friction and pipe radius [J]. Earthquake Engineering and Engineering Vibration, 2006, 26(3): 197-199

[8] DimitriosK. K., GeorgeD. B., GeorgeP. K.. Stress analysis of buried steel pipelines at strike-slip fault crossings [J]. Soil Dynamics and Earthquake Engineering, 2007, 27(3): 200-211