METHOD OF ANALYSIS OF EFFECTS OF CARGO FIRE ON PRIMARY AIRCRAFT STRUCTURE TEMPERATURES
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Abstract
Embodiments provide systems and methods for analyzing effects of cargo fire on primary aircraft structure. A thermal profile of a suppressed fire in a cargo compartment of an aircraft is developed. The thermal profile is applied to a heat transfer model of structure of an aircraft, and structural integrity of the modeled structure is analyzed. The thermal profile may be developed by introducing a fire in a physical model of a cargo compartment instrumented with temperature sensors and determining profiles of temperature versus time. A heat transfer model of aircraft structure is built, boundary conditions are input into the heat transfer model, and the model is run. When analysis of the modeled structure determined structural integrity to be insufficient to satisfy flight certification requirements, structural parameters are modified, the thermal profile is applied to a heat transfer model of the modified structure, and the analysis is repeated.
148 Citations
36 Claims
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1-9. -9. (canceled)
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10. A method comprising:
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developing a thermal profile of a suppressed fire in a physical model of a cargo compartment of an aircraft, wherein the physical model is built to enable the measurement of temperatures generated during ignition and suppression of a controlled cargo fire, wherein the thermal profile of the suppressed fire includes one or more profiles of temperature versus time for a plurality of locations in the physical model of the cargo compartment; analyzing heat transfer resulting from applying the thermal profile of the suppressed fire to a structure of the aircraft surrounding the cargo compartment to determine a predicted temperature reached by one or more parts of the structure surrounding the cargo compartment as a result of the suppressed fire; and generating an output at a display or other output device of a computer system, the output including the predicted temperature reached by the one or more parts of the structure surrounding the cargo compartment to facilitate analyzing whether the one or more parts of the structure surrounding the cargo compartment have sufficient strength after reaching the predicted temperature to safely land the aircraft. - View Dependent Claims (11, 12, 14, 15, 16, 17, 19, 20, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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13. (canceled)
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18. (canceled)
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21-25. -25. (canceled)
Specification