Ayman N. Qadrouh, José M. Carcione, Mamdoh Alajmi, Jing Ba
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引用次数: 0
Abstract
This paper revisits the theories of Q (quality factor) as a measure of the attenuation and velocity dispersion of a wave field. Q is a dimensionless measure of energy loss per cycle, and a proper understanding is important in a variety of fields, from seismology, geophysical prospecting to acoustics of materials. Measurements for standing modes and propagating waves differ and yield the temporal and spatial Q, respectively. This distinction is largely ignored in the literature. The relationship between these Qs is investigated for a power-law stress–strain relation based on spatial fractional derivatives that describes the behavior of compressional waves when combined with the conservation of momentum equation. In addition, the relationship between the quality factors for low-loss media proposed by Knopoff et al. 60 years ago is verified.
期刊介绍：
The Arabian Journal of Geosciences is the official journal of the Saudi Society for Geosciences and publishes peer-reviewed original and review articles on the entire range of Earth Science themes, focused on, but not limited to, those that have regional significance to the Middle East and the Euro-Mediterranean Zone.
Key topics therefore include; geology, hydrogeology, earth system science, petroleum sciences, geophysics, seismology and crustal structures, tectonics, sedimentology, palaeontology, metamorphic and igneous petrology, natural hazards, environmental sciences and sustainable development, geoarchaeology, geomorphology, paleo-environment studies, oceanography, atmospheric sciences, GIS and remote sensing, geodesy, mineralogy, volcanology, geochemistry and metallogenesis.
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