Study on properties of compressional wave speed of water saturated porous medium
The water saturated porous medium is widely distributed in nature, of which the research of acoustic nature is the focus in areas such as the exploration of resources, fault diagnosis and so on. By considering three kinds of couplings between liquid phase and solid phase of water saturated porous medium, a freedom factor added and coupledframe elastic, modular considered Men-Chen model (FCMCM) is established, which is solved to draw a conclusion that the water saturated porous medium could spread a shear wave and two compressional waves named as fast wave and slow wave. To the seabed sediment, the analysis of the compressional wave velocity by FCMCM has gotten such properties as follows: in the low frequency range, fast wave has no dispersion in velocity, while slow wave has dispersion; with porosity increasing, speeds of fast wave and slow wave both decrease while the impact on slow wave is greater than on fast wave; with temperature going up, the speed of sound of sediment is on the rise. The research of mechanism and model on water saturated porous medium of the sound propagation provides theoretical and methodological support for the exploration of resources and fault diagnosis. The application of FCMCM in the analysis of the seabed sediment characteristics of the compressional wave velocity will play an important role on in situ and remote sensing measurement for the broad seabed sediment of South China Sea.
Water-saturated porous medium Sound wave Measurement Sediment Temperature
Dapeng Zou Baihai Wu Bo Lu
Guangdong University of Technology, Guangzhou 510090, China Key Laboratory of Marginal Sea Geology, South China Sea Institute of Oceanology, Chinese Academy of
国际会议
杭州
英文
952-955
2009-04-08（万方平台首次上网日期，不代表论文的发表时间）