Aiming to estimate the sound power radiating from a thin rectangular plate subejected to random collision of flying small object
such as bottom plate of a vhicle and baounced gravels, time history of impact force is precisely measured with a rigid body pendulum equipped with a force sensor
and is approximated with a mathematical function. Frequency spectra of vibration and noise radiation of a rectangular plate on which various fyling objects strike are
then
e gear having very thin body, the modal analysis and the forced vibration analysis of a thick cylinder with a circular plate and a solid shaft were carried out. And then frequency spectrum of the radiating sound power could be precisely estimated and was experimentally validated.
* This research is a collaborative research with Mazda Motor Corporation.
