摘要
导弹水下发射时,在横向载荷作用下的姿态变化是影响发射安全的重要因素。笔者围绕水下弹射引起的多相流动及支承结构变形载荷,以计算流体力学方法和嵌套动网格技术为基础,依据弹体六自由度运动引起的支承载荷变化,构建水下弹射与横向动力学耦合计算模型。该模型应用于模拟弹射和横向流作用下的导弹弹射过程,模拟结果表明:采用流动与刚体动力学耦合模型计算结果与实验测量结果在最大负压冲击下误差小于5%,能够有效描述水下弹射的水-气两相流动特征,可用于水下弹射与动力学模型的耦合分析。
The attitude change of a missile under lateral loading during underwater launch affect launch safety.Based on computational fluid dynamics(CFD)and overset dynamic mesh method,multiphase flow caused by underwater ejection is simulated.Underwater ejection and lateral dynamic coupling model in accordance with the changes of bearing load caused by missile of 6-DOF movement is established.Simulation results show that the coupling model and the experimental measurement result have an error of less than 5%at the maximum negative pressure impact.It is shown that the characteristics of water-air two-phase flow during underwater ejection can be described effectively by coupling model.Moreover,the model can be used for coupling analysis of underwater ejecting launch and dynamics model.
作者
刘浩天
傅德彬
赵世平
毕凤阳
卢丙举
Liu Haotian;Fu Debin;Zhao Shiping;Bi FengYang;Lu Bingju(School of Aerospace Engineering,Beijing Institute of Technology,100081,Beijing,China;The 713 Research Institute of CSIC,450015,Zhengzhou,China;He’nan Key Laboratory of Underwater Intelligent Equipment,450015,Zhengzhou,China)
出处
《应用力学学报》
CAS
CSCD
北大核心
2021年第4期1505-1511,共7页
Chinese Journal of Applied Mechanics
基金
装备预研领域基金(61402070104)。
关键词
水下弹射
横向动力学
变形响应
多相流动
underwater ejecting
lateral dynamic
deformation response
multiphase flow
