Speaker Resonator Interaction
Posted: 17 Sep 2022, 00:15
Hi all,
Operating System: Debian GNU/Linux 11
KDE Plasma Version: 5.20.5
KDE Frameworks Version: 5.78.0
Qt Version: 5.15.2
Kernel Version: 5.10.0-16-amd64
OS Type: 64-bit
Processors: 4 × AMD FX(tm)-4350 Quad-Core Processor
Memory: 15.6 GiB of RAM
Graphics Processor: AMD CAICOS
I have been trying to model a speaker coupled to a helmholtz resonator (bass reflex system). I wish to apply a constant amplitude sinusoidal force to the speaker (plate) and obtain the speaker deflection vs frequency. Because of some things that I plan to do to modify the system, I can't use the usual off the shelf design software that is available.
Since the plate and resonator interact, I need a coupled system. This is my first attempt to use coupled solvers and I am at a total loss. Attached is a tar file that contains the whole project as far a I have gotten. The device is modeled in FreeCAD, Exported as a .brep file that is meshed with gmsh (latest). The .msh file is run through ElmerGrid (ElmerGrid 14 2 ArcTest2.msh -autoclean -merge 0.25). I set up the plate as a spring mass system whose parameters are conversions of the Thiel parameters of the speaker. Could anyone fill in the blanks for me?
Gary R.
Operating System: Debian GNU/Linux 11
KDE Plasma Version: 5.20.5
KDE Frameworks Version: 5.78.0
Qt Version: 5.15.2
Kernel Version: 5.10.0-16-amd64
OS Type: 64-bit
Processors: 4 × AMD FX(tm)-4350 Quad-Core Processor
Memory: 15.6 GiB of RAM
Graphics Processor: AMD CAICOS
I have been trying to model a speaker coupled to a helmholtz resonator (bass reflex system). I wish to apply a constant amplitude sinusoidal force to the speaker (plate) and obtain the speaker deflection vs frequency. Because of some things that I plan to do to modify the system, I can't use the usual off the shelf design software that is available.
Since the plate and resonator interact, I need a coupled system. This is my first attempt to use coupled solvers and I am at a total loss. Attached is a tar file that contains the whole project as far a I have gotten. The device is modeled in FreeCAD, Exported as a .brep file that is meshed with gmsh (latest). The .msh file is run through ElmerGrid (ElmerGrid 14 2 ArcTest2.msh -autoclean -merge 0.25). I set up the plate as a spring mass system whose parameters are conversions of the Thiel parameters of the speaker. Could anyone fill in the blanks for me?
Gary R.