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| Analysis of Rebound Effect for Blast Door Under Negative Phase Pressures |
| Guo Dong1，2，Liu Jing-bo1，Yan Qiu-shi1 |
| 1. Department of Civil Engineering , Tsinghua University, BeiJing 100084, China；2. Navy Engineering Design and Research Bureau, Beijing 100070, China |
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Abstract The rebound effect of blast door is studied under the negative phase of blast loading. The reasonable approximate blast pulse shape is adopted to obtain the exact analytical formulas of rebound force for blast door, with taking into account the negative phase effect. The blast waves negative phase effect on blast door is assessed. Although the affection of rebound effect is appropriate, only the peak value of negative pressure is close to positive pressure at the condition of large scaled distance, in meantime, negative pressure shows the increasing effects on the rebound for blast door. But the response may be emerged only under the small overpressure. Due to the small peak value of both positive and negative pressures, stiffness of blast door seems to have relatively large value. The blast door would not be damaged by the increased rebound effect, therefore, the effect of negative pressure might be ignored in the design of protective structures.
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Received: 01 January 1900
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Corresponding Authors:
Guo Dong
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2011, Vol. 30 
