000022324 001__ 22324
000022324 005__ 20170622150007.0
000022324 04107 $$aeng
000022324 046__ $$k2015-05-25
000022324 100__ $$aChen, Weiyun
000022324 24500 $$aPLANE WAVE AT THE INTERFACE BETWEEN WATER AND A GASSY POROELASTIC LAYER WITH UNDERLYING ELASTIC SEABED

000022324 24630 $$n5.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000022324 260__ $$bNational Technical University of Athens, 2015
000022324 506__ $$arestricted
000022324 520__ $$2eng$$aBased on the multiphase poroelasticity theory, the reflection characteristics of an obliquely incident plane wave upon a plane interface between overlying water and a gassy marine sediment layer with underlying elastic solid seabed are investigated. The sandwiched gassy layer is modeled as a porous material with finite thickness, which is saturated by two compressible and viscous fluids (liquid and gas). The closed-form expression for the amplitude ratio of the reflected wave, i.e., reflection coefficient, is derived according to the boundary conditions at the upper and lower interfaces in the proposed model. Using numerical calculation, the influences of incident angle, wave frequency, layer thickness and liquid saturation of sandwiched porous layer on the reflection coefficient are analyzed, respectively. It is revealed that the reflection coefficient is closely associated with incident angle and sandwiched layer thickness. Moreover, in different frequency ranges, the dependence of the wave reflection characteristics on moisture (or gas) variations in the intermediate marine sediment layer is distinguishing.

000022324 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000022324 653__ $$aPlane wave, Reflection coefficient, Gassy marine sediments, Ocean floor;

000022324 7112_ $$aCOMPDYN 2015 - 5th International Thematic Conference$$cCrete (GR)$$d2015-05-25 / 2015-05-27$$gCOMPDYN2015
000022324 720__ $$aChen, Weiyun$$iChen, Guoxing
000022324 8560_ $$ffischerc@itam.cas.cz
000022324 8564_ $$s1389646$$uhttps://invenio.itam.cas.cz/record/22324/files/C472.pdf$$yOriginal version of the author's contribution as presented on CD, section: 
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000022324 962__ $$r22030
000022324 980__ $$aPAPER