摘要
以内加筋圆柱壳为研究对象,对近距离非接触爆炸作用下气泡的脉动载荷以及气泡溃破高速射流对内加筋圆柱壳结构的毁伤机理进行计算分析,并且探讨结构参数、药包位置等相关物理量对结构变形特征与毁伤模式的影响。研究结果表明,水下爆炸气泡膨胀产生的膨胀脉动冲击造成结构的整体变形,另一方面气泡溃破所造成的高速射流(速度>100 m/s)则会对局部区域造成严重破坏,弹塑性边界以及自由液面效应会对气泡的形状产生显著的影响。
The damage mechanism of inner-stiffened cylindrical shell subjected to pulsation and collapse-jet loads from underwater explosion bubbles was analyzed, and the influences of some physical quantities, such as structural parameters, location of satchel charges etc., on the structural deformation characteristics and damage mode were investigated. The research results show that the global structural deformation are mainly caused by the UNDEX bubble expansion impact, and the high speed bubble collapse jet （velocity〉100m/s） can cause serious local damage of the strucatre. Analyses also indicate that the elastic-plastic boundary effect and the free surface effect have significant influence on the shape of the UNDEX bubble.
出处
《噪声与振动控制》
CSCD
2012年第6期111-115,共5页
Noise and Vibration Control
基金
华中科技大学博士论文创新基金(基金编号:0109140921)
关键词
冲击
内加筋圆柱壳
水下爆炸气泡
射流
毁伤
shock
inner-stiffened cylindrical shell
underwater explosion bubble
jet
damage
