Application of Signal Analysis and Pattern Recognition Procedures to Study Blast Induced Ground Motion

摘要

The second-year results of an effort to introduce computer automated signal analysis and pattern recognition procedures to the study of blast-induced ground motion is presented. Intermediate results involving the characterization of ground motion acceleration records to identify ground spall versus no spall regions is reported. A computerized procedure extracted information from the time, frequency, and cepstrum description of the signal. These signal features were then incorporated into a Fisher's Linear Discriminant (FLD) pattern recognition procedure. Procedures to identify good and bad features are reviewed. This identification seems to be required for the efficient and effective application of the FLD. (Author)