An application of ground vibration test results to calculate aeroelastic stability and control parameters

1979 ◽  
Author(s):  
C. STOCKDALE
Keyword(s):  
Ground Vibration ◽  
Vibration Test ◽  
Control Parameters ◽  
Test Results ◽  
Aeroelastic Stability ◽  
Stability And Control ◽  
And Control

Aeroelastic Stability of a Transport Aircraft With Wing Mounted Store Suspension: Part I — Analysis

Volume 2 ◽  
2004 ◽  
Author(s):  
Altan Kayran
Keyword(s):  
Ground Vibration ◽  
Free Vibration Analysis ◽  
Point Of View ◽  
Scale Model ◽  
Vibration Test ◽  
Aeroelastic Stability ◽  
Transport Aircraft ◽  
Ground Testing ◽  
Modes Of Vibration ◽  
Local Store

The present study outlines the analysis work, backed by the relevant ground testing, performed for the verification of aeroelastic stability of a transport aircraft modified with the installation of an external store to the outer wing. The initial analysis work consisted of free vibration analysis and ground vibration testing of the modified aircraft for the identification of the natural frequencies and associated modes of vibration in still air. The beam-like half scale model of the aircraft was updated based on the results of the ground vibration test. External store wing connection stiffness was determined by means of vibration test performed for the identification of local store-wing structural interface modes. The dynamic model was updated again and flutter analyses were performed for different mass configurations of the aircraft. Mass configurations that are critical from flutter point of view were identified. Analysis results indicate that the flutter speeds of the aircraft with wing mounted store suspension, although lowered compared to the basic aircraft, stay above the values required by the flutter regulation MIL-A-8870C.

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