Particle Motion Induced by Elastic Waves Radiating from Subsurface, Penny-Shaped Cracks and Mapping of Subsurface Cracks

Kazuo Hayashi, Shuji Motegi

研究成果: Article査読

抄録

Dynamic, elastic responses of rocks against the sudden growth of a subsurface penny-shaped reservoir crack ane analyzed in order to study the characteristics of elastic waves from the crack and particle motions observed at observation stations in an intermediate region where the distance from the crack is several ten times the size of the crack. In the analysis, a singular intergrodifferential equation was derived in Laplace image space, and the equation was solved numerically by a collocation method. The results show that the radial and circumferential displacements rise steeply just after P and S wave arrivals, respectively, where small oscillations are superimposed on the steeply rising portions. It is also shown that the displacement vectors are pointing to the crack tip where the crack growth is taking place, not the center of the crack.

本文言語English
ページ(範囲)817-823
ページ数7
ジャーナルTransactions of the Japan Society of Mechanical Engineers Series A
56
524
DOI
出版ステータスPublished - 1990

ASJC Scopus subject areas

  • 材料科学(全般)
  • 材料力学
  • 機械工学

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