Evaluation of Predictive Methods for Instructure Shock Wave Propagation
Abstract
The analysis of explosively-generated shock wave propagation through enclosed structures is of particular interest to engineers concerned with structural blast responses. Accurate predictions of peak pressure and impulse values are often difficult to generate analytically due to various complications inherent in modeling complex structures. Several tools, based on empirical data, exist that aid the engineer in quickly scoping airblast propagation, but these require many simplifying assumptions that may invalidate the results. Three predictive methods, one analytical, one computational, and one experimental, were used in this study to analyze blast propagation through a predefined, semi-enclosed structure. Expected blast pressure data were determined for the specific case of an explosive charge detonating above an opening in the structure at a series of locations on the structure . BlastX, a simple airblast prediction tool developed by the US Army Engineer Research and Development Center, analytically predicts pressure time-history data for specific user-defined locations within a fully-enclosed, predefined space or series of spaces based primarily on empirical fits [1]. CTH, an advanced hydrocode developed by Sandia National Laboratories for the purpose of modeling materials under large deformation, was used for high-fidelity analyses of shock propagation through the structure [2]. Finally, a 1/8th-scale model of the structure was constructed. Scaled explosive charges were used to gather blast pressure data at locations coincident with the analytical and computational models. These experimental data were then compared to the other two methods, and the results are presented herein.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 2010
- Accession Number
- ADA560530
Entities
People
- C. Price
- Deborah J. Nelson
- Jesse A. Sherburn
- R. N. Boone
- T. Slawson
Organizations
- United States Army Corps of Engineers