导弹发射箱发射过程热流固耦合数值模拟  

Numerical Simulation of Thermal Fluid Solid Coupling of Launch Box

作　　者：邹长星 邓春丽 袁森 ZOU Changxing;DENG Chunli;YUAN Sen(College of Mechanical Engineering,Guizhou Institute of Technology,Guiyang 550003,China;School of Mechanical Engineering,Guizhou University,Guiyang 550025,China)

机构地区：[1]贵州理工学院机械工程学院,贵州贵阳550003 [2]贵州大学机械工程学院,贵州贵阳550025

出　　处：《机械与电子》2022年第7期22-26,共5页Machinery & Electronics

摘　　要：为研究导弹热发射过程中发射箱结构应力与变形分布规律,建立了发射箱内流场域、外流场域和结构域1/4对称模型。采用域动分层法和单向热流固耦合技术模拟导弹发射,得到发射箱内外壁的压强、温度变化。仿真结果表明:导弹发射过程中,由于高温高压燃气流的烧蚀和冲击,在发射0.0200 s时刻发射箱前端加强筋处应力最大,为7209.10 MPa;在发射0.0200 s时刻发射箱前端处变形最大,为27.24 mm。该仿真验证为箱体结构优化设计与制造提供了数据支持及理论依据。In order to study the distribution law of the structural stress and deformation of the launch box in the process of missile thermal launch,1/4 coupling model of internal flow field,outflow field and structural domain of the launch box were established.The domain dynamic division method and the thermo fluid solid coupling technology were used to simulate the missile launch and obtain the temperature and pressure changes of inner and outer wall of the launch box.The simulation results show that:the largest stress and the most deformation respectively occurred at front stiffener and front of the launching box,both at 0.0200 s,with 7209.10 MPa and 27.24 mm independently,during the process of missile launching due to the ablation and impact of high temperature and high pressure gas flow.The simulation verification provides data support and theoretical basis for the optimal design and manufacture of box structure.

关 键 词：发射箱 应力 变形 域动分层法 热流固耦合技术 

分 类 号：TJ768.2[兵器科学与技术—武器系统与运用工程]