摘要
为进行气动弹性问题的计算,提出了一种全隐式紧耦合算法,在子迭代过程中分别采用LU-SGS隐格式和隐式线性多步法交替求解气动和结构方程,以获得物理时间域的高精度解。一种径向基函数和超限插值结合的方法被用来进行气动网格的快速变形。运用该算法,进行了Isogai wing和AGARD 445.6 wing的颤振分析,颤振边界的计算结果与文献值和实验值较符合,表明该全隐式紧耦合算法能够有效地计算气动弹性问题。
In order to calculate the aeroelastic problem,a fully-implicit strong coupling algorithm is developed in this work.By alternately solving flow equations with the LU-SGS scheme and the structural equations with the implicit linear multistep method in the sub-iteration process,high-accuracy solutions can be obtained at each physical time step.A grid deformation approach employing the radial basis function combined with the transfinite interpolation is introduced here to generate a moving grid fastly.By applying this developed algorithm,flutter analyses of both Isogai wing and AGARD 445.6 wing are carried out.Simulation results of flutter boundaries agree well with literature and experiment data,which implies that this algorithm can calculate aeroelastic problems effectively.
出处
《宇航学报》
EI
CAS
CSCD
北大核心
2010年第11期2471-2476,共6页
Journal of Astronautics
基金
国家自然科学基金资助(50776056)
关键词
气动弹性
紧耦合
线性多步方法
径向基函数
超限插值
Aeroelasticity
Strong coupling
Linear multistep method
Radial basis function
Transfinite interpolation
