Abstract
This paper investigates a method for identifying the location and the force history of an impact acting on isogrid-stiffened panels using the radiated sound. Sound waves radiated from the structure during the impact are measured with microphones. The impact location is identified using the differences in arrival times of sound waves at each microphone. The force history is identified by minimizing the deviation between the time histories of the measured sound pressure and the estimated one. The estimated time history of sound pressure is calculated from transfer matrices which relate the impact force and the sound pressure. Impact force identification is performed experimentally, and the identified impact locations and force histories are compared with the measured ones to verify the accuracy of the identification method.
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