圆柱壳在水下爆炸作用下鞭状响应试验研究  

Study on the whipping response of a stiffened cylindrical shell in an underwater explosion

作　　者：黄晓明[1] 朱锡[1] 牟金磊[1] 李海涛[1] 

机构地区：[1]海军工程大学船舶与动力学院,湖北武汉430033

出　　处：《哈尔滨工程大学学报》2010年第10期1278-1285,共8页Journal of Harbin Engineering University

基　　金：国家973计划资助项目(51335020101)

摘　　要：针对药包在模型中部位置情况,研究了不同潜深,不同爆距和不同方位角下圆柱壳模型鞭状响应的发展过程和变化规律.利用大型室内爆炸筒,将高速摄影技术和应变测量相结合定量捕捉爆炸气泡和模型的相互作用过程,发现模型的响应可分解为主要受气泡滞后流支配的刚体运动和以湿模态一阶垂向振动为主的弹性振动两部分.当气泡脉动频率与模型振动频率接近时,气泡脉动压力和滞后流与模型冲击振动产生的正叠加效应,使模型产生鞭状响应,最大应变响应值为冲击波作用响应峰值的2~4倍,且受爆距、方位角和潜深影响.The developmental process and the change laws governing the whipping response of a cylindrical model at different dive depths,different distances and directional angles from an explosive were investigated.The focus was on the case of a charge under the middle of the model.By making use of a large indoor explosion tube,it was possible to observe the processes effecting explosion bubbles and a model.The study combined applications of high speed photography and strain test technology.It was found that the response of the model could be resolved into rigid motion,where the response was dominated by flow delay,itself induced by bubble motion,and elastic vibration,which was dominated by the wet modal first-order vertical vibration.When the frequency of bubble impulses and the frequency of the model＇s vibrations were closest,the bubble impulse pressure and delay flow resonated with the model＇s shock vibration,thus producing the model＇s whipping response.The largest strain value could be 2-4 times the peak value of the shock wave＇s effects on the vibrational strain value.These results were effected by dive depth,distance to the explosion and the directional angle of the explosion.

关 键 词：圆柱壳 水下爆炸 鞭状运动 试验研究 高速摄影 

分 类 号：U661.6[交通运输工程—船舶及航道工程]