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university of florida thesis or dissertation formatting template

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Impact on Future Design <strong>of</strong> Aircraft and St<strong>or</strong>es<br />

The prediction <strong>of</strong> LCO behavi<strong>or</strong> <strong>of</strong> fighter aircraft is critical to mission safety and<br />

effectiveness, and the accurate determination <strong>of</strong> LCO onset speed and amplitude <strong>of</strong>ten requires<br />

flight test verification <strong>of</strong> linear flutter models. The increasing st<strong>or</strong>es certification demands f<strong>or</strong><br />

new st<strong>or</strong>es and configurations, and the associated flight test costs, necessitate the development <strong>of</strong><br />

tools to enhance computation <strong>of</strong> LCO through modeling <strong>of</strong> the aerodynamic and structural<br />

sources <strong>of</strong> LCO nonlinearities. Once the state <strong>of</strong> fluid-structure interaction (FSI) codes advances,<br />

the temp<strong>or</strong>al analysis techniques applied in this <strong>dissertation</strong>, namely the Lissajous and wavelet<br />

plots, can be applied in <strong>or</strong>der to identify LCO conditions and design new st<strong>or</strong>es such that they<br />

avoid an LCO condition. These methods can also be applied when developing new st<strong>or</strong>e-carrying<br />

fighter aircraft such as the F-35. Many <strong>of</strong> the unexpected problems encountered by the F-16 (also<br />

the F-15 and F-18) can be avoided altogether f<strong>or</strong> this new aircraft, drastically reducing the<br />

required number <strong>of</strong> flight tests, associated costs, and the risks encountered by the pilots flying<br />

the aircraft in such dangerous conditions.<br />

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