The use of surface wave techniques for verification of dynamic rigidity measurements in a kaolinite-water artificial sediment.
Walsh, William Egan
MetadataShow full item record
A three-dimensional model for the study of surface wave speed measurements in simulated ocean bottom sediments has been constructed using a high-porosity kaolinite-water mixture in a rectangular tank in the laboratory. The propagation of surface waves , assumed to be Rayleigh waves , was studied over the 75 Hz to 300 Hz frequency range using a gated sine wave source and several geophone receivers. Shear wave speeds in the sediment are determined to be 23 m/sec. These measurements are qualitatively compared with measurements made by previous investigators in similar sediments using a torsionally oscillating rod viscoelastometer whose resonant characteristics are sensitive to loading by the sediment in which it is imbedded. Good correlation of results is found with the shear wave speeds calculated from the viscoelastometer data which are in the range of 20 to 30 m/sec.
Showing items related by title, author, creator and subject.
Mine impact burial model (IMPACT35) verification and improvement using sediment bearing factor method Fan, Chenwu; Chu, Peter C. (2007);Recently, a 3-D model (IMPACT35) was developed to predict a falling cylindrical mine’s location and orientation in air–water–sediment columns. The model contains the following three components: 1) triple coordinate transform, ...
Tjoa, Kristi Mad (Monterey, California. Naval Postgraduate School, 2003-06);The effects of shoaling inner shelf solitons on the bottom boundary layer have been observed and analyzed over a two month summer period at the Monterey Inner Shelf Observatory in Monterey, CA, during 2002. Utilizing CTD ...
Estimation of bottom backscattering strength from measured and modeled AN/SQS-53C reverberation levels Scanlon, Gary Alexander. (Monterey, California. Naval Postgraduate School, 1995);Hamilton type geoacoustic models were developed for Area Foxtrot, a NUWC test bed for emerging active sonar systems where the surface sediment type is highly spatially variable. Reverberation levels (RL) were modeled using ...