Learning Forum

[Pramodya Wijesinghe]

Hello everyone,

I have conducted experiments on the sound absorption coefficient and impedance ratio using the impedance tube with the two-microphone transfer function method for fiber-reinforced CEMENT COMPOSITE (This involved mixing fibers WITH CEMENT, SAND AND WATER at three volume ratios and three lengths). Now, I am interested in mathematically and numerically modeling it using the JCA (Johnson-Champoux-Allard) model. However, the JCA model requires five parameters as inputs, whereas I only have one parameter, which is porosity.

Therefore, I intend to utilize ANSYS to implement the JCA model and perform parameter optimization for the remaining four unknown parameters using curve fitting or any other suitable method. In curve fitting, I plan to use either impedance ratio or sound absorption coefficient, which I obtained experimentally, to optimize the model results to best fit the experimental results for sound absorption. Once the best fit is achieved, I can then optimize the unknown four parameters.

However, I am completely new to ANSYS and unsure where to begin. Could anyone provide guidance on how to proceed? Thank you very much.

[Ashish Khemka]

Hi,

Please see if the following link helps you: JCA parameters for acoustic study (ansys.com)

Regards,

Ashish Khemka