Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : September 09, 2018 - September 12, 2018
In cabin design such as automobiles, agricultural machines and construction machines, it is necessary to consider acoustic characteristics, and its analysis becomes important. However, while medium frequency of 300 to 1000 Hz is important in cabin design, at present it can only analyze to 0 to 300 Hz in numerical analysis using FEM and so on, and the analysis method in the mid frequency domain has not been established yet. Generally when evaluating the loss factor of a cabin or the like, a plurality of loss coefficients must be used for a sound field in a three-dimensional space. Therefore, in this study, we propose a method to give a uniform loss by using the mode strain energy method and confirmed its validity by comparing with the experimental value. Finally, we compare it with the classical method using room constants and demonstrate the superiority to the classical method.
