Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Seafloor Deposition State Based Geoacoustic Model of the South China Sea
Considered the complexity of the actual seabottom state due to characteristics of layers, diverse temperature and pressure in the South China Sea, sediments are sorted into porosity-unchanged type (PDC) and porosity-decreased type (PDD). By stress-strain analysis of two-phase medium of sediment under gravity, the establishment of a wave propagation model considered depth variety (DFCMCM) theoretically reveals the acoustic properties that with depth PDC type sediments change slowly, while PDD type sediments increase in compressional wave velocity. A novel geoacoustic model expression concerned about seabottom sedimentary state is introduced and four representative basic geoacoustic models of sediments in the South China Sea to be expressed as: low-speed PDC (GMI1), low-speed PDD (GMI2), high-speed PDC (GMII1) and high-speed PDD (GMII2). By using the combination of the four basic models, the actual sedimentary acoustic state could be rationally explained with the example of the Lu's three sound-speed structures of the South China Sea. The understanding of basic geoacousic models will benefit the seafloor detection and classification of bottom region with acoustic means in the South China Sea.
Seafloor Deposition State Based Geoacoustic Model of the South China Sea
Considered the complexity of the actual seabottom state due to characteristics of layers, diverse temperature and pressure in the South China Sea, sediments are sorted into porosity-unchanged type (PDC) and porosity-decreased type (PDD). By stress-strain analysis of two-phase medium of sediment under gravity, the establishment of a wave propagation model considered depth variety (DFCMCM) theoretically reveals the acoustic properties that with depth PDC type sediments change slowly, while PDD type sediments increase in compressional wave velocity. A novel geoacoustic model expression concerned about seabottom sedimentary state is introduced and four representative basic geoacoustic models of sediments in the South China Sea to be expressed as: low-speed PDC (GMI1), low-speed PDD (GMI2), high-speed PDC (GMII1) and high-speed PDD (GMII2). By using the combination of the four basic models, the actual sedimentary acoustic state could be rationally explained with the example of the Lu's three sound-speed structures of the South China Sea. The understanding of basic geoacousic models will benefit the seafloor detection and classification of bottom region with acoustic means in the South China Sea.
Seafloor Deposition State Based Geoacoustic Model of the South China Sea
Zou, D. P. (Autor:in) / Wu, B. H. (Autor:in) / Lu, B. (Autor:in)
Marine Georesources & Geotechnology ; 29 ; 61-75
24.01.2011
15 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Seafloor Deposition State Based Geoacoustic Model of the South China Sea
| Online Contents | 2011
| British Library Online Contents | 1996