Vibration suppression and transfer attenuation of a structure based on an additional plate

Aiming at a T-shape structure formed by a lateral plate and an additional plate, theoretical analysis of its vibration attenuation characteristics was done. Using finite element method, the laws of the structural vibration suppression and transfer attenuation versus the various parameters of the additional plate were systematically studied. Based on these results, the oil baffle of an oil pan was modified. The study showed that compared with other structural parameters of the oil baffle, the plate thickness can more significantly decrease the vibration amplitude of the local area and weaken the transfer of vibration; moreover, a double-layer additional plate has the same change trend of vibration suppression and transfer attenuation as that of the plate thickness increasing of a one-layer additional plate, but the former has better effects.