重力坝水下接触爆炸的数值分析  

NUMERICAL ANALYSIS ON CONCRETE GRAVITY DAMS SUBJECT TO UNDERWATER CONTACT EXPLOSION

作　　者：徐强[1,2] 曹阳[2] 陈健云[1,2] 

机构地区：[1]大连理工大学海岸与近海工程国家重点实验室,大连116024 [2]大连理工大学工程抗震研究所,大连116024

出　　处：《工程力学》2017年第6期137-145,共9页Engineering Mechanics

基　　金：国家重点基础研究发展计划"973"课题项目(2013CB035905);中央高校基本科研业务费专项资金项目(DUT15LK34;DUT14QY10);国家自然科学基金重点基金项目(51138001;51178081);辽宁省重点实验室专项基金项目(LZ2015022)

摘　　要：采用显式程序AUTODYN中的Euler-Lagrange耦合算法模拟混凝土重力坝水下接触爆炸。研究在不同炸点的水下接触爆炸荷载作用下大坝的动力响应以及损伤裂纹分布特点。针对上述特点采用泡沫铝作为抗爆材料,研究了泡沫铝的抗爆效果。研究结果表明:采用泡沫铝作为大坝水下爆炸抗爆材料能大幅降低爆炸冲击波幅值,减小大坝的动力响应,同时能减小爆炸对坝体产生损伤及裂纹分布范围,具有良好的抗爆性能。The Euler-Lagrange coupled method in AUTODYN was used to simulate concrete gravity dams subject to underwater contact explosion. The characteristics of damage crack distribution and dynamic responses of the gravity dam subjected to explosion loading from different explosion positions were analyzed. Considering the above characteristics, the aluminum foam was adopted as the antiknock material. Research results show that aluminum foam can effectively reduce the amplitude of shock wave and the dynamic response of the dam; meanwhile, the explosion damage on the dam was decreased and the scope of the cracks distribution was narrowed down. This shows the aluminum foam has good antiknock performance when used in underwater contact explosion.

关 键 词：重力坝 水下接触爆炸 损伤 裂纹分布 抗爆材料 泡沫铝 

分 类 号：TV642[水利工程—水利水电工程] O383.1[理学—流体力学]