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Optimization of electro-acoustic eigen-problem
Posted 19 mai 2022, 05:51 UTC−4 Structural & Acoustics, Acoustics & Vibrations, Structural Mechanics Version 5.3a 0 Replies
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Hello:
I have a speaker and I need to adjust its f0 to 500Hz and I want to use optimization method to adjust the Young's coefficient of the diaphragm so that its f0 is 500Hz. I use optimization + eigenfrequency analysis, the objective function of optimization is written as (sqrt(realdot(freq,freq))-500[Hz])^2, the control variable is the Young's coefficient of the diaphragm; and the eigenfrequency settings are as follows: the desired eigenfrequency is 1, and the search range is 500[Hz].
Although the Young's coefficient can be calculated, when I perform the eigenfrequency analysis with the optimized Young's coefficient, it is found that the "second" eigenfrequency corresponds to 500[Hz] instead of the "first" eigenfrequency corresponds to 500[Hz].
I would like to ask how to adjust the "first" eigenfrequency to the value I want instead of the other eigenfrequency to the value I want in the above solution method?
Thank you.
Hello 宇宣 林
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