| 引用本文: | 王思,胡晶,张雪东,任晓丹,陈祖煜,张紫涛.不同水深水下爆炸数值及离心试验研究[J].哈尔滨工业大学学报,2020,52(6):78.DOI:10.11918/202001082 |
| WANG Si,HU Jing,ZHANG Xuedong,REN Xiaodan,CHEN Zuyu,ZHANG Zitao.Numerical analysis and centrifugal test of underwater explosion effect at different water depths[J].Journal of Harbin Institute of Technology,2020,52(6):78.DOI:10.11918/202001082 |
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| 不同水深水下爆炸数值及离心试验研究 |
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王思1,胡晶2,张雪东2,任晓丹3,陈祖煜1,2,张紫涛2
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(1.浙江大学 岩土工程研究所,杭州 310058; 2.中国水利水电科学研究院,北京 100048; 3.同济大学 土木工程学院,上海 200092)
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| 摘要: |
| 重大水利工程是国家重要的基础建设,其在水下爆炸作用下的毁伤值得关注.为此,分别采用离心机模型试验和有限元模拟,研究蓄水位变化对坝体响应的影响.通过数值模拟验证超重力场下缩比模型与原型的相似性.然后,基于 50g下的离心机模型试验,对数值模拟的有效性进行验证.在此基础上,采用数值模拟系统分析不同蓄水位下水下爆炸对大坝振动及变形的影响.结果表明:在炸药当量及位置不变的条件下,增加蓄水位高度会导致坝体速度、位移等响应增大；当水深超过25 m时,坝体多个部位的速度峰值将超过规范给出的安全速度峰值,坝体可能产生损伤；蓄水位变化将引起坝体所受冲击能量的变化,影响坝体的动能及应变能,采用球面波冲击因子可以描述坝体能量变化. |
| 关键词: 水下爆炸 水工建筑 蓄水位高度 能量 冲击因子 |
| DOI：10.11918/202001082 |
| 分类号:TU375 |
| 文献标识码:A |
| 基金项目:国家自然科学基金(3,6) |
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| Numerical analysis and centrifugal test of underwater explosion effect at different water depths |
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WANG Si1,HU Jing2,ZHANG Xuedong2,REN Xiaodan3,CHEN Zuyu1,2,ZHANG Zitao2
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(1.Institute of Geotechnical Engineering, Zhejiang University, Hangzhou 310058, China; 2.China Institute of Water Resources and Hydropower Research, Beijing 100048, China; 3.College of Civil Engineering, Tongji University, Shanghai 200092, China)
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| Abstract: |
| Major water conservancy projects are important national infrastructures, whose damages caused by underwater explosions are noteworthy. Hence, centrifuge model tests and finite element simulations were used to study the effect of water storage level changes on the responses of dam. First, the similarity between the scaled model and the prototype in the hyper-gravity field was verified by numerical simulation. Next, based on the centrifuge model test at 50g, the effectiveness of the numerical simulation was verified. Then, a numerical simulation system was adopted to analyze the effects of underwater explosion on vibration and deformation of dam under different water storage levels. Results show that under the condition that the explosive equivalent and position remained unchanged, increasing the height of the water storage level caused the increase of the responses of the dam velocity and displacement. When the water depth exceeded 25 m, the peak velocity of multiple parts of the dam body exceeded the norm, and the dam might be damaged. Changes of the water storage level caused the impact energy of the dam to change, which affected the kinetic energy and strain energy of the dam. The energy change could be described by the spherical wave shock factor in this experiment. |
| Key words: underwater explosion hydraulic structure water storage level energy shock factor |
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