| 胡晶,陈祖煜,魏迎奇,张雪东,梁建辉,张紫涛.考虑球面波效应的水下爆炸冲击因子[J].水利学报,2018,49(10):1227-1235 |
| 考虑球面波效应的水下爆炸冲击因子 |
| An impact factor for underwater explosion considering effects of spherical wave |
| 投稿时间：2018-07-18 |
| DOI：10.13243/j.cnki.slxb.20180663 |
| 中文关键词: 冲击因子 球面波 水下爆炸 平板 |
| 英文关键词: impact factor spherical wave underwater explosion plate |
| 基金项目:国家自然科学基金重点项目（51339006） |
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| 中文摘要: |
| 水工建筑物的安全防护关系着国防和民生安全，目前还缺少有效的指标评估水下爆炸冲击波对大坝等结构的作用。水下爆炸冲击波通常以球状向四周传波，本文推导了球面波作用下结构的总能量，由此建立了水下爆炸冲击因子衡量结构的振动与变形响应。针对正面挡水、背面临空的平板结构，分别开展了数值模拟及离心水下爆炸试验研究，通过数值模拟，验证了在相同冲击因子条件下，爆距的变化几乎不影响平板产生的应变能和动能。随后采用本文所得的冲击因子对离心水下爆炸试验结果进行整理，并与传统的比例距离、平面波冲击因子等指标的分析结果进行对比。本文所得的冲击因子可以统一描述近场和远场水下爆炸作用。 |
| 英文摘要: |
| Safety and protection of hydraulic structure is significant in national defense. There is no effective index to evaluate the dynamic responses caused by underwater explosion. Generally, the shock wave generated by underwater explosion propagates spherically. This paper derives the total energy of structure subjected to spherical wave. A new impact factor is established,which can be used to evaluate the vibration and deformation responses of structures. Numerical modeling and centrifugal underwater explosion test were conducted on air-backed structure to investigate the capability of the impact factor. The numerical results indicate that changes of standoff distances almost have no influence on the strain energy and kinetic energy on plate as long as the impact fact is kept constant. Then, the impact factor is used to characterize the centrifugal test results. The impact factors in this paper are more suitable for both near and far field underwater explosion compared with scaled distance or plane wave impact factor. |
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