某型机跨音速等幅振动研究

Analysis study on transonic speed equal amplitude vibration of a certain Type of aircraft

针对某型机定型试飞中遇到的跨音速等幅振动现象 ,对该机的颤振分析和试飞实测振动数据进行了研究。结果表明 ,该型飞机跨音速等幅振荡现象主要是由于外挂物连接间隙引起的 ,文中对采取的排故措施进行了描述 ,验证试飞结果表明该振动现象已被排除。从而保证了定型试飞的顺利进行。

In the flight of transonic speed equal amplitude vibration of a certain type of aircraft encountered during the type finalization test, a study on the flutter analysis and vibration data measured in real flight test are performed. The result showed that the transonic speed equal amplitude vibration of this type of aircraft is caused by the gap of the connection of external stores. Problem removal measures to be taken are described in the paper and the result of verification test shows this vibration phenomenon has been removed, which guarantees success performance of type finalization flight test.