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QUESTION
I am currently trying to simulate acoustic resonators using OpenModelica, and I am wondering how to robustly/nicely calculate their resonance frequency.
As a simplified example (without Media, etc), I have implemented a dual Helmholtz resonator, in essence two volumes (compliances) connected by a pipe (inertance). The real system consists of more components connected together.
The oscillation of pressure and volume flow (both complex values) follow a sinusoidal expression, with a resonance angular frequency w
. This yields 8 equations for 4 pressures and 4 volume flows (at the end points and compliance-inertance connection points).
Here a Modelica code I am solving in OpenModelica nightly:
...ANSWER
Answered 2019-Sep-11 at 14:28What are the classes ComplexU
, ComplexPressure
, Compliance
and Inertance
? I tried running your model but these seem to be part of another library you are using. I replaced them with MSL or primitive types.
Furthermore i don't really understand how that model is supposed to work, you only defined an initial equation
block and no actual equations. I tried following model:
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