Flutter is a dynamic aeroelastic instability that may cause structural failure and limits flight envelope of an aircraft. A passenger aircraft is required to be free from flutter and other aeroelastic instability phenomena, as stated in the regulations such as FAR 25. 33 / FAR 23.33. This paper presents the flutter analyses of the WISE aircraft using MSC Nastran. The analyses were carried out to the V-tail, one of the component where flutter might occur, by assuming rigid fuselage. Results of each analysis, in the form of velocity-damping and velocity-frequency curves, were evaluated to determine the critical flutter speed and frequency. First the analysis were conducted for sea level operation using KE, PK and PKNL methods which predict respectively the flutter speed of 1036 knot, 1037 knot, and 1037 knot. The three methods also consistently predict that the mode shapes involved in the flutter are the 5^th mode and the 3^rd mode. Then by using the PK-method, the analysis were repeated for air density variation. It is shown that the lower the air density, the higher the flutter speed is. It is concluded that tail flutter does not occur during the operation of the WISE craft with max operating speed of 80 knot.

颤振是一种动态气动弹性不稳定性，可能导致结构失效并限制飞机的飞行包线。如 FAR 25. 33 / FAR 23.33 等规定中所述，要求客机没有颤振和其他气动弹性不稳定现象。本文介绍了使用 MSC Nastran 对 WISE 飞机进行颤振分析。通过假设机身刚性，对 V 型尾翼进行了分析，V 型尾翼是可能发生颤振的部件之一。以速度-阻尼和速度-频率曲线的形式评估每次分析的结果，以确定临界颤振速度和频率。首先使用KE、PK和PKNL方法对海平面运行进行分析，分别预测1036节、1037节和1037节的颤振速度。^次模式和3^次模式。然后通过使用 PK 方法，重复分析空气密度变化。结果表明，空气密度越低，颤振速度越高。得出结论，WISE 船在最大运行速度为 80 节的运行过程中没有发生尾颤。