Numerical investigation of dynamic soil response around a submerged rubble mound breakwater

OCEAN ENGINEERING

卷:156

Article

Zhao, H. Y.^1,2  Liang, Z. D.²  Jeng, D. -S.^1,2  Zhu, J. F.³  Guo, Z.⁴  Chen, W. Y.⁵ 

[1] Hohai Univ, State Key Lab Hydrol Water Resources & Hydraul En, Nanjing 210098, Jiangsu, Peoples R China

[2] Griffith Univ, Sch Engn & Built Environm, Gold Coast Campus, Southport, Qld 4222, Australia

[3] Ningbo Univ, Fac Architectural Civil Engn & Environm, Ningbo 315211, Zhejiang, Peoples R China

[4] Zhejiang Univ, Coll Civil Engn & Architecture, Hangzhou 310058, Zhejiang, Peoples R China

[5] Nanjing Tech Univ, Inst Geotech Engn, Nanjing 210009, Jiangsu, Peoples R China

关键词: Fluid-seabed-structure interactions (FSSI);    VARANS equation;    Biot's theory;    Co-existence of wave and currents;    Submerged breakwater;    Momentary liquefaction;   

DOI  :  10.1016/j.oceaneng.2018.03.005

来源: Elsevier

【 摘 要 】

A better understanding of physical process of the fluid-seabed-structure interaction (FSSI) is beneficial for engineers involved in the design of marine infrastructures. Most previous studies for the problem of FSSI have considered wave-only conditions, despite the co-existence of wave and current in the real ocean environment. Unlike the previous studies, currents are included in the present study for the numerical modelling of FSSI, using an integrated FVM-FEM scheme, in which the VARANS equation is used to simulate fluid field, while Biot's poroelastic model is used for porous flow in a seabed. Numerical examples show the important influences of currents on the local hydrodynamic process and the resulting dynamics of seabed foundation around a submerged rubble mound breakwater. The structure is relatively stable in the presence of counter-current waves, whereas the co-current waves would significantly compromise the instability of structure due to potential of shear failure and liquefaction in its sandy seabed foundation.

【 授权许可】

Free