CAJ | 학술논문

论述了界面上的数据交换方法和时间推进格式在流体动力学(CFD)和结构动力学(CSD)耦合求解非线性气动弹性同题中的关键作用;改进了CFD/CSD耦合系统,包括基于边界元方法设计了CFD和CSD耦合界面的数据转换方法,该方法可在同一映射矩阵处理结构响应和非定常气动载荷转换,保证了耦合边界上的能量守恒;改进了一种松耦合方法流程,在保持模块化基础上提高了计算精度和效率.最后将本文方法应用于二维位移外插算例和A-GARD445.6机翼的动响应分析中,结果表明本文方法具有较高精度.
논술료계면상적수거교환방법화시간추진격식재류체동역학(CFD)화결구동역학(CSD)우합구해비선성기동탄성동제중적관건작용;개진료CFD/CSD우합계통,포괄기우변계원방법설계료CFD화CSD우합계면적수거전환방법,해방법가재동일영사구진처리결구향응화비정상기동재하전환,보증료우합변계상적능량수항;개진료일충송우합방법류정,재보지모괴화기출상제고료계산정도화효솔.최후장본문방법응용우이유위이외삽산례화A-GARD445.6궤익적동향응분석중,결과표명본문방법구유교고정도.
The data information transfer and time marching strategies between computational fluid dynamics (CFD) and computational structural dynamics (CSD) play crucial roles on the aeroelastic analysis in a time domain. An improved CFD/CSD coupled system is designed, including an interpolation method and an improved loosely coupled algorithm. The interpolation method based on boundary element method (BEM) is developed to transfer aerodynamic loads and structural displacements between CFD and CSD grid systems, it can be universally used in fluid structural interaction solution by keeping energy conservation. The improved loosely coupled algorithm is designed, thus it improves the computational accuracy and efficiency. The new interface is performed on the two-dimensional (2-D) extrapolation and the aeroelastic response of AGARD445. 6 wing. Results show that the improved interface has a superior accuracy.