STRUCTURAL-ACOUSTIC MODAL COUPLING ANALYSIS AND APPLICATION TO NOISE REDUCTION IN A VEHICLE PASSENGER COMPARTMENT
✍ Scribed by S.H. KIM; J.M. LEE; M.H. SUNG
- Publisher
- Elsevier Science
- Year
- 1999
- Tongue
- English
- Weight
- 418 KB
- Volume
- 225
- Category
- Article
- ISSN
- 0022-460X
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✦ Synopsis
A practical method for noise reduction is proposed and is applied to the interior noise problem of a vehicle passenger compartment. The proposed method is based upon the structural}acoustic response model, in which the interior pressure is explicitly described in terms of the modal parameters and structural-acoustic modal coupling coe$cients of the car body and compartment system. Considering only a few modes and modal coupling coe$cients which have large contributions, the cause of the noise peak can be easily identi"ed and the reduction procedure can be simpli"ed compared with the conventional "nite element analysis method. In addition, the use of experimental data reduces some inevitable errors in the numerical analysis and re"nes the numerical predictions in noise problems. These procedures are carried out by using a user-friendly computer program (ACSTAP) which has been developed during the course of this study.