Analysis of Dynamic Aircraft Response to Bomb Damage Repair
Air Force Weapons Laboratory Kirtland AFB United States
Pagination or Media Count:
Expedient repair methods and settlement of expedient repair materials create roughness in repaired airfield pavement surfaces. The effect of this roughness on aircraft operated over a repair has been of serious concern to organizations designing repair procedures. An analysis is made of the dynamic response of F-4 aircraft when operated over an actual AM-2 mat Bomb Damage Repair BDR surface utilizing data obtained in FY73 BDR full scale testing. A computer code, entitled TAXI, yields the g loadings on various parts of the aircraft, the strut forces, and the strut displacements when the repair profile is used as program input. It was determined that a speed of 45 fps yields the largest responses. Running the program with variations of the profile to simulate settlement of the backfill indicated that the initial construction roughness creates more adverse effects than settlement within the repair area of up to 0.4 foot. Consequently, any effort to reduce roughness should concentrate on repair surface grading rather than improving the quality of the backfill material.
- Terminal Flight Facilities