Compressional Wave Speed and Absorption Measurements in a Saturated Kaolinite-Water Artificial Sediment.
Abstract
The absorption coefficient for compressional waves in a water-saturated, kaolinite clay was measured in the frequency range 100 to 150 kHz using a pulse technique with spherically diverging waves. The measurement also permitted determination of the sound speed, Vp. For one condition of the clay with a 77% porosity, the sound speed was 1422 m/sec. The absorption coefficient, a, was found to be frequency dependent, satisfying the empirical relationship a = 0.033 f dB/m, f being the frequency in kHz. No dispersion of wave speed with frequency was observed. These results were used together with the results of dynamic shear (rigidity) modulus measurements made with a torsional wave viscoelastometer to calculate the complex Lame constants of a viscoelastic model. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1972
- Accession Number
- AD0742928
Entities
People
- Charles Allen Martinek
Organizations
- Naval Postgraduate School