バックドア振動制御によるワンボックスカーのこもり音低減(機械力学,計測,自動制御)

概要

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In recent years one-box-cars are very popular in the market. Hence their interior noise level is required to be the same as that of passenger cars. One of the problems to be solved is to develop reduction method for low-frequency booming noises caused by, for example, road shock. To reduce low-frequency booming noises after the design is completed requires modification of the car in a large scale. So the development of a noise reduction method applicable in an early stage of design is desired. In this paper, we analyzed the mechanism of the occurrence of road shock low-frequency booming noises of a newly developing one-box-car. We found that bringing the resonance frequency of the back door near to the resonance frequency of the bending mode of the car reduces the booming noises. Based on this result, we really could reduce the noises in the newly developed one-box-car.
2002-04-25