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Getting Transmission Loss from FFT simulation in Time Dependent Study

Posted 16 août 2024, 12:25 UTC−4 Structural & Acoustics, Acoustics & Vibrations, Structural Dynamics Version 6.2 0 Replies

FDZR
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I'm simulating a nonlinear phononic crystal using time dependent study. My goal is to get the transmission loss for the structure and compare it with frequency domain study.

So I defined my study following the Loudspeaker Driver — Transient Analysis defining study 1 as time dependent and applying the sin displacement for a certain frequency and then collecting the input and output displacement history for last cycle. Then I defined another study as time dependent + fft to convert my results into frequency domain defining ODE & DAEs. I can successfully do this. However, I'm not clear how can we calculate the transmission loss out of that since I'm getting a different peaks for various frequencies.

also if I apply a range of frequencies as my source frequency, how can I integrate all of these results into a unique general transmission loss spectrum.

Thanks

0 Replies Last Post 16 août 2024, 12:25 UTC−4
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