带外挂后掠机翼极限环颤振的分析与实验研究

从理论及实验两方面，研究了带外挂后掠机翼的极限环颤振分叉现象，得到了稳定、半稳定及不稳定极限环。理论分析采用谐波平衡法，并通过在时域拟合非定常空气动力后，用数值积分法对所得结果进行了比较。风洞实验结果验证了理论分析结果的正确性。

Analytical and Experimental Study on Limit Cycle Flutter for Sweepback Wing Store

Both theoretical and experimental analyses are performed to investigate the limit cycle flutter bifurcation of a sweepback wing with an external store in the tip of the wing. The harmonic balance method is used for theoretical analysis. The stable, semi stable, and unstable limit cycles are observed. It is shown that the bifurcation points correspond to the semi stable limit cycles. Numerical integration results calculated by the four order Runge Kutta method are given to verify the theoretical predictions. The wind tunnel tests were made and the experimental data agreed well with the theoretical results.