某飞机平尾振动特性研究

THE INVESTIGATION ON VIBRATION CHARACTERISTICS OF ALL MOVABLE STABILIZER OF AN AIRCRAFT

某飞机全动平尾的旋转频率是影响颤振特性的重要参数之一。飞机首次共振试验测量的平尾旋转频率偏低,不满足设计要求,因而成为影响试飞的一个难题。本文概述了非线性因素对平尾振动特性的影响以及为解决这一准题所采取的措施。

A new aircraft adopted the all movable stabilizer whose shaft was fixed on the fuselage. The results of the calculations and model tests indicated that the rotation frequency of the all-movable stabilizer is an important parameter for the flutter characteristics of an aircraft. Because the lower rotation frequency was discovered in the first aircraft's ground vibration test, the design requirements were not met. It once became a big problem in the aircraft flight tests.The rotation frequency of all movable stabilizer depends on many factors. The non-linear effects on rotation frequency are briefly described in this paper. The measures adopted to raise the rotation frequency are also presented. Thus, the higher rotation frequency is obtained and the design requirements are met without any weight penalty.