固支方板在水下爆炸气泡射流作用下动态响应  

Dynamic Response of Stiffened Square Plate Subjected to Jets Load due to Underwater Explosion Bubbles

作　　者：牟金磊[1] 李海涛[2] 

机构地区：[1]海军工程大学舰船工程系,武汉430033 [2]海军工程大学科研部,武汉430033

出　　处：《噪声与振动控制》2012年第6期125-129,共5页Noise and Vibration Control

基　　金：国家自然科学基金青年基金(基金编号:51109216);海军工程大学自然科学基金青年基金(基金编号:HGDQNJJ11011)

摘　　要：为研究水下爆炸气泡溃灭发生射流时对水中结构的影响,借助于商用瞬态动力学有限元软件MSC.Dytran,对固支方板在水下爆炸载荷作用下的动态响应进行研究。对底部爆炸和侧面爆炸两种典型情况进行计算,将气泡运动过程与试验结果进行对比分析,两者吻合较好,验证所建立方法的可行性。在此基础上,对射流发生时流场情况以及固支方板的响应特点进行分析,认为射流载荷是局部载荷,可以引起严重的局部破坏,在近场水下爆炸研究中必须予以重视。In order to study the effect of the liquid jets from collapsed bubbles to the structure, the commercial transient dynamic FEM software MSC.Dytran was used to simulate the dynamic response of stiffened plate subjected to underwater explosion. The explosion was beneath or on the sides of the structure. The tracks of the bubbles in simulation were in accordance with those of the experimental result, which verifies the feasibility of the simulation methods. The flow filed conditions and response of the stiffened square plate were also analyzed. It was concluded that the load of jets can cause serious local damage of the structure, and it has to be considered in the research of near field explosion.

关 键 词：冲击 水下爆炸 气泡射流 固支方板 数值仿真 

分 类 号：O381[理学—流体力学] O346[理学—力学]