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- Title
1603. Numerical simulation and experimental validation of the Mach reflection effect of shock wave under ground surface blast.
- Authors
Iau-Teh Wang
- Abstract
The hazard of a shock wave is an important consideration in blasting engineering design. The scope of effect and extent of damage caused by a shock wave depends on its energy. In addition to the blasting pressure and the horizontal distance to the blast center, the Mach effect caused by the ground surface reflection is also an important factor in the analysis of the transmission pattern of a shock wave. Therefore, the purposes of this study were to investigate the characteristics of the shock wave effect induced by a surface contact blast, and to analyze the energy attenuation pattern, as well as the impact distances where the Mach reflection effect might occur. To accomplish the purposes, this study conducted 0.5 lb TNT explosive field blasting experiments and numerical simulation analyses. Experimental results and data from the numerical simulation were compared with each other to analyze the shock wave transmission and Mach wave effect. The numerical analysis used an Arbitrary Lagrangian-Eulerian (ALE) algorithm and fluid-solid interaction method, with eight-node solid elements and three-dimensional solid structural model to conduct the analysis. Results of this study will enable more accurate and practical assessments of blasting effects, and provide references for future construction planning, facility shock-absorption and disaster prevention design, in order to reduce potential shock wave hazards and ensure facility safety protection, as well as a secure building safe zone.
- Subjects
SHOCK waves; BLASTING machines; COMPUTER simulation; EXPERIMENTAL design; EMERGENCY management; ATTENUATION of seismic waves
- Publication
Journal of Vibroengineering, 2015, Vol 17, Issue 3, p1413
- ISSN
1392-8716
- Publication type
Article