声呐浮标空投入水受力特性仿真研究

针对声呐浮标由于入水动态特性所造成的空投姿态与定位精度的变化,基于非定常势流理论建立了旋成体声呐浮标入水冲击非定常特性的数学模型.以某型声呐浮标入水临界点为初始条件给出了仿真测量结果,并对比分析了不同入水角与不同入水速度对声呐浮标动态特性的影响.仿真结果显示,改变入水角和入水速度均能显著改变声呐浮标入水动态响应特性,但...

Research of Water-Entry Mechanical Property of Sonobuoy

According to the changes of airdrop attitude and positioning accuracy caused by water-entry dynamic characteristic,the mathematical model of water-entry impact force of the spinning sonobuoy is proposed under the unsteady potential flow theory.The simulation results focusing on the water-entry critical status as the initial conditions for a certain type of sonobuoy is proposed and the comparison between different angles of entrance and different speeds of entrance for the mechanical performance impact of the sonobuoy can also be obtained.The results show that the water-entry dynamic response characteristics of the sonobuoy can significantly change when the angle and the velocity change,and reducing the water-entry forced oscillation should be given priority consideration because the change of dynamics concussion domain is the majoring function of water-entry velocity.The study gives a theoretical basis for the overall design and planning of sonobuoy,research of water entry trajectory and acquire of the initial posture.