刚性α/β尖拱体垂直姿态高速入水冲击理论建模与仿真  

Theoretical Modeling and Simulation of Rigid Ogive on Its High-speed and Vertical Water Entry

作　　者：王永虎[1] 石秀华[1] 傅妍芳[1] 赵军荣[1] 李文哲[1] 

机构地区：[1]西北工业大学,陕西西安710072

出　　处：《新技术新工艺》2007年第12期27-29,共3页New Technology & New Process

摘　　要：首先对刚性圆锥体以垂直姿态高速入水这个特殊情况进行理论分析,引入Shiffman的圆锥体流体附加质量,进行相应的简化处理,在理论上,采用动量定理方法分析其单频次高速入水冲击现象;然后重点分析刚性α/β尖拱体垂直高速入水冲击问题,引进与液面隆起有关的沾湿因子以及采用等效液面代替水平自由液面,通过Baldwin等效锥方法进行理论建模,以充分贴合实际的入水冲击现象;最后给出不同初始状态入水冲击的仿真与分析,特别是讨论了液面隆起对α/β尖拱体垂直入水冲击的影响。The impact of water-entry bodies striking a water surface often causes an extremely large load with high transient local pressure on the bodies. Firstly, rigid cone on their high-speed and vertical water entry are theoretically modeled, introducing into induced the Shiffman virtual mass of cone and analyzing the non-periodic impact process with the help of the momentum theorem. The water-entry process of the cone is simplified to dispose; and the same time, the wetted body surface factor and the substituted equivalent water surface are adopted in vertical water-entry of ogive in order to be in harmony with the local uprise of water. In the end, water-entry processes are simulated with different inception velocity and so on, especially discussing water pile affects the vertical water entry of ogive.

关 键 词：尖拱体 高速 垂直入水 液面隆起 仿真 

分 类 号：TJ631[兵器科学与技术—武器系统与运用工程]