原文传递
Effect of Charge Shape and Initiation Configuration of Explosive Cylinders Detonating in Free Air on Blast-Resistant Design
| 题名： | Effect of Charge Shape and Initiation Configuration of Explosive Cylinders Detonating in Free Air on Blast-Resistant Design |
| 正文语种： | 英文 |
| 作者： | Weifang Xiao, A.M.ASCE; Matthias Andrae; Norbert Gebbeken, M.ASCE |
| 作者单位： | Univ, of Bundeswehr Munich |
| 关键词： | Charge shape; Length-to-diameter ratio; Initiation configuration; Azimuth angle; Arbitrary Lagrangian-Eulerian |
| 摘要： | This paper investigates the in fluence of the cylindrical charge characteristics, i.e., the length-to-diameter ratio, orientation, and initiation configuration, on the blast loads (peak overpressure and maximum impulse). Three different initiation configurations were considered, i.e., at the center, at one end, and at both ends. Numerical models were developed for the spherical and cylindrical charges. The numerical results were analyzed along the gauge lines at different azimuth angles around the cylindrical charges. Some important observations were made. Neglecting the charge shape effect, the peak overpressure (maximum impulse) in the near field generated from centrally initiated cylindrical charges can be underestimated by a factor as high as 3.0 (1.9). Therefore, the cylindrical charge shape should be explicitly modeled in the numerical simulations for the blast-resistant design of protective structures subjected to near-field detonations. It is con firmed that the shock front heals into a spherical one in the far field. Hence, the blast loads generated from the spherical charge of the same mass can be used In addition, the influence range, beyond which the charge shape effect can be neglected, is 5.7 m/kg1/3 for the impulse, which is about twice that for the overpressure (3.2 m/kg1/3). In general, the maximum values of blast loads resulted by the three considered initiation configurations can be sorted in descending order, i.e., at one end > at the center > at both ends. The initiation con figuration at one end (at the center) has the largest in fluence range of 3.9 m/kg1/3 (5.7 m/kg,/，3) for the overpressure (impulse) among the three con sidered initiation configurations. |
| 出版日期： | 2020 |
| 出版年： | 2020 |
| 期刊名称： | Journal of Structural Engineering |
| 卷： | Vol.146 |
| 期： | No.08 |
| 页码： | 04020146 |
相关文献
- Influence of Charge Shape and Point of Detonation on Blast-Resistant Design
- Influence of Reservoir Water Levels on the Protective Performance of Concrete Gravity Dams Subjected to Underwater Explosions
- Inference of Blast Wavefront Parameter Uncertainty for Probabilistic Risk Assessment
- Strain Rate Effect on Development Length of Steel Reinforcement
- High-Strength Materials for the Response Enhancement of Reinforced Concrete Structures Subjected to Cased Explosive Charges
- Approach to Developing Design Charts for Quantifying the Influence of Blast Wave Clearing on Target Deformation
检索历史
应用推荐
