The Effects of External Stores on the Flutter of a Non-Uniform Cantilever Wing.
AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OHIO SCHOOL OF ENGINEERING
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A computer study of the effects of external stores simulated by lumped masses was conducted with a finite element, cantilever, nonuniform wing model. The NASTRAN Level 16.0 computer program flutter format was used to obtain flutter speeds and frequencies. Mass balancing with a single concentrated mass caused a reduction in flutter speed as the mass was moved chordwise toward the trailing edge and spanwise toward the wing tip. Flutter speeds and frequencies of a 100 lb and a 200 lb store, simulated by two equal masses, were compared to an equivalent concentrated mass at the store center of gravity. The stores consistently raised the flutter frequency over that of the single mass, but flutter speed results were not conclusive. Author
- Fluid Mechanics