Dynamic interaction between a partially corroded pipeline and saturated poroelastic medium under plane waves. Issue 105 (February 2018)

• Record Type: Journal Article
• Authors: Fang, Xue-Qian; Li, Bai-Lin
• Is Part Of: Soil dynamics and earthquake engineering. Issue 105(2018)
• Page Start: 22
• Page End: 26
• Publication Date: 2018-02
• Subjects: Corroded pipeline -- Saturated poroelastic medium -- Plane waves -- Dynamic stress; Soil dynamics -- Periodicals; Earthquake engineering -- Periodicals; Sols -- Dynamique -- Périodiques; Génie parasismique -- Périodiques; 624.176205
• DOI: 10.1016/j.soildyn.2017.11.022
• Languages: English
• ISSNs: 0267-7261

Abstract

Abstract: A fundamentally based mathematical model of a partially corroded pipeline in a saturated poroelastic medium is presented, and the dynamic interaction around the pipeline under plane waves is derived. Based on Biot's poroelastic theory, the dynamic governing equations of the saturated poroelastic medium are decomposed. The wave fields around the corroded pipeline are expanded by using the wave function expansion method. The loose poroelastic medium in the corroded areas is simulated by the spring-type medium, and the thickness of pipeline is small. By introducing the different boundary conditions in the corroded and perfect areas, the expanded coefficients are solved. Through numerical examples, the jump of dynamic stress resulting from the corroded area under different wave frequencies is examined in detail. Highlights: A practical model of partially corroded pipeline embedded in saturated poroelastic medium is proposed. The analytical solution of stresses around the corroded pipeline subjected to dynamic loadings is obtained. The dynamic response evolution of this model under different parameters is captured. Some methods for increasing the reliability of pipelines in offshore oil and gas transmission are given.