飞机机翼-外挂干扰颤振特性分析

Analysis on External stores Jam Flutter characteristics of Aircraft wing

分析了飞机机翼—外挂干扰颤振特性。在颤振特性分析中所需要的广义气动力是根据亚音速非定常升力面理论，采用马蹄涡—振荡压力偶极子格网法计算的。利用某型飞机全机带外挂物的地面共振试验结果，对飞机机翼—外挂干扰的颤振特性进行了分析研究。探讨了由于振动频率、颤振自由度、广义质量等参数的变化对机翼—外挂干扰颤振特性影响的一些特点。

The paper analyzes the external stores jam flutter characteristics of aircraft wing.The generalized aerodynamic force required in analysis is calculated by using horse shoe vortex— vibrational pressure doublet grid method,based on theory of subsonic unsteady lifting plane.By using ground resonance test results from certain type of aircraft with full external stores,the analysis and research are performed on the flutter characteristics of external stores jam of aircraft wing.This paper probes the features of the effect on the external stores jam flutter characteristics due to the variation of parameters of vibration frequency,flutter freedom and generalized mass.