HR: 1340h
AN: ED33A-0768    [Abstracts]
TI: Source signature and acoustic field of seismic physical modeling
AU: * Lin, Q
EM: qlin@ncat.edu
AF: North Carolina A&T State University, 1601 E. Market St, Greensboro, NC 27411 United States
AU: Jackson, C
EM: cjackson@ncat.edu
AF: North Carolina A&T State University, 1601 E. Market St, Greensboro, NC 27411 United States
AU: Tang, G
EM: gtang@ncat.edu
AF: North Carolina A&T State University, 1601 E. Market St, Greensboro, NC 27411 United States
AU: Burbach, G
EM: van@pyramidenvironmental.com
AF: Pyramid Environmental and Engineering, P.C, 700 N. Eugene Street, Greensboro, NC 27401 United States
AB: As an important tool of seismic research and exploration, seismic physical modeling simulates the real world data acquisition by scaling the model, acquisition parameters, and some features of the source generated by a transducer. Unlike the numerical simulation where a point source is easily satisfied, the transducer can't be made small enough for approximating the point source in physical modeling, therefore yield different source signature than the sources applied in the field data acquisition. To better understand the physical modeling data, characterizing the wave field generated by ultrasonic transducers is desirable and helpful. In this study, we explode several aspects of source characterization; including their radiation pattern, directivity, sensitivity and frequency response. We also try to figure out how to improve the acquired data quality, such as minimize ambient noise, use encoded chirp to prevent ringing, apply deterministic deconvolution to enhance data resolution and t-P filtering to remove linear events. We found that the transducer and their wave field, the modeling system performance, as well as material properties of the model and their coupling conditions all play roles in the physical modeling data acquisition.
DE: 7294 Instruments and techniques
DE: 7299 General or miscellaneous
DE: 6605 Education
SC: Education and Human Resourcese [ED]
MN: 2004 AGU Fall Meeting