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Influence of Charge Shape and Point of Detonation on Blast-Resistant Design
| 题名： | Influence of Charge Shape and Point of Detonation on Blast-Resistant Design |
| 正文语种： | 英文 |
| 作者： | Pushkaraj Sherkar;Jinwon Shin;Andrew Whittaker, M.ASCE;Amjad Aref, M.ASCE |
| 作者单位： | Univ, at Buffalo |
| 关键词： | Detonations; Charge shape; Charge orientation; Point of detonation; Blast-resistant design; Shock and vibratory effects |
| 摘要： | Charts in technical manuals and standards of practice can be used to compute incident and reflected peak overpressures and scaled impulses gen erated by a detonation of a high explosive. Design values are reported for spherical free-air bursts and hemispherical surface bursts as a function of scaled distance and angle of incidenee, where the charges are detonated at the center of the sphere. This paper describes a numerical study with a verified and validated computational fluid dynamics code that characterizes the in fluence of charge shape, charge orientation, and the point of detonation within the charge on free-field incident overpressures and impulses. Analyses are performed with cylindrical charges of different aspect ratios and masses, and results are compared with those of a baseline analysis of a spherical charge. In the near field and midfield, charge shape and point of detonation affect the peak overpressure and impulse, providing values that are significantly different from those associated with a central detonation of a spherical charge of the same mass. The effect of charge shape and point of detonation can be ignored, for the purpose of a design based on impulse, at scaled distance greater than 3 m/kg"\ DOI: 10.1061/ (ASCE)ST. 1943-541X.0001371. © 2015 American Society of Civil Engineers. |
| 出版日期： | 2016.02 |
| 出版年： | 2016 |
| 期刊名称： | Journal of Structural Engineering |
| 卷： | Vol.142 |
| 期： | NO.02 |
| 页码： | 04015109 |
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