Abstract:

The acquisition of sound power is an important part of the acoustic performance development of mechanical products， but it takes a lot of time and cost to obtain the sound power by testing. In this paper， a high-frequency acoustic power load identification method based on acoustic transfer function and regularization method is proposed. Firstly， a high frequency acoustic transmission model is established to deduce the relationship of sound power， ATF and sound pressure level of receiver under mono and multi-source conditions. Then， the regularization method is introduced to avoid the test error of matrix singular value amplification. The L curve criterion is used to calculate the regularization parameters to realize acoustic power load of high frequency inversion. Finally， the acoustic power of the engine， fan and inlet and exhaust of an excavator under two working conditions is inverted by this method. And the analysis results are compared with the experimental results. The results show that the proposed method has high accuracy and can achieve high precision reverse calculation of high frequency acoustic load.

Key words: acoustic transfer function, regularization, sound power, load identification