UID:
kobvindex_GFZ20190918153434
Format:
vi, 91 Seiten
,
Illustrationen
Series Statement:
CRREL Report 76-28
Content:
Fourier transforms of selected ground-motion time histories from five underground high-explosive and nuclear detonations are used to define the transmission properties (Transfer functions) of three rock types. Absorption, a measure of a rock's energy dissipating characteristics, is expressed for each of the tests as a function of the frequency of transmission. Dispersion results from a variation in transmission velocity with frequency and is described for each test by a phase velocity spectrum. The transmission properties from one of the sites are used to predict a ground-motion time history at that site from another nuclear event. The potential use of Fourier techniques to make ground-motion predictions and to measure in-situ material properties is discussed.
Note:
Contents
Section I: Introduction
Section II: Analytical procedures
1. Fourier transforms
2. Basic transform properties
3. Transform techniques
4. The transfer function
Section II: Parameter studies and program evaluations
1. Analytical parameter study
2. I-TRAIN evaluation
3. S-TRAIN evaluation
Section IV: Data
1. DATEX I
2. DATEX II
3. STARMET
4. MINERAL LODE
5. HARD HAT and PILEDRIVER
Section V: Analysis of transformed data
1. Absorption
2. Dispersion
3. Transfer function
Section VI: Fourier synthesis
Section VII: Discussion
Literature cited
Appendix A: The Fourier integral and series
Appendix B: Subroutine FOURT used in analysis
Appendix C: I-TRAIN and S-TRAIN programs
In:
CRREL Report, 76-28
Language:
English
Keywords:
Forschungsbericht
URL:
https://hdl.handle.net/11681/9525
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