The Robust Design for Acoustic Characteristic Modification with Taguchi Method : Analysis on Booming Noise Reduction in Heavy Duty Truck Cab

Abstract

Structural-acoustic analysis was performed in order to reduce booming noise due to floor panel vibration in heavy duty truck cab. Usually a common cab is used for various truck configurations. Therefore, a robust cab design which allows reduction f booming noise under various cab excitation forces is deemed to be important. As a first step towards this goal, finite element model of a cab floor panel and bounday elment model of a cab cavity were created, and the good correlation of booming noise between the simulation and excitation test was confirmed. In order to propose a rubust cab design, Taguchi Method was applied for a design parameter sstudy of the floor structure. This paper describes the method which can evaluate the effect of design parameters quantitatively with the ratio of main effect variance and interaction variance between main effect and excitation frequency. The parameters for noise reduction over a wide frequency range and paramers for noise reduction at a specified frequency can be discriminated with this method.