摘要
高超声速飞行器的系统仿真是一个气动流场、结构应力场以及结构温度场的高度耦合过程,仿真过程中,需要在耦合界面上完成数据的迭代交换,传递的内容主要包括位移、速度、压力、温度等耦合数据,主要作用就是完成各个耦合场的方程之间参数的传递,在统一的仿真时间内实现仿真的迭代。耦合界面数据传递的技术难点在于要保证耦合界面处的总功守恒以及多物理场耦合仿真的精度[1]。目前大多采用以插值为主的局部数据传递方法针对二元耦合开展研究与应用[1,3],局部插值的缺点在于全局精度偏低,偏差较大,计算速度不高。采用径向基函数法(RBF),对界面数据交换方法的仿真应用进行了研究,验证结果表明,计算精度满足仿真要求,求解方程的速度较快,工程应用效果较好。
The system simulation of hypersonic vehicles is a high coupling procedure of aerodynamic field, stress field and temperature field of structure. In the simulation procedure, the data exchange in each iteration should be finished on the coupling surface. The exchanged content mainly includes the coupling data of displacement, velocity, stress, temperature and so on. It aims at parameters transfer of the equations within theses coupling fields＇ and achieves simulation iteration in a uniform simulation time step. The technical difficulties in the data exchange of coupling surfaces are keeping the conservation of power and the precision of multi-physics coupling. At present, the local data exchange methods mainly based on interpolation for dual coupling are studied and applied. The disadvantages of the local data exchange methods are low global precision, big deviation and low computing speed. In this paper, a surface data exchange method with Radial Based Function method （RBF） was studied and applied in multiphysics coupling simulation. The experimental results show that the computing precision satisfies the simulation＇ s requirement, the speed of solving the equations is quick enough, and the effectiveness of applying the presented method in engineering is good.
出处
《计算机仿真》
CSCD
北大核心
2015年第1期23-28,共6页
Computer Simulation
关键词
多物理场耦合
径向基函数法
界面数据传递
Multi-physics coupling
Radial based function method
Data exchange of surface
