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Importing Sysnoise code into COMSOL
Posted 29 déc. 2009, 03:55 UTC−5 1 Reply
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Hi all,
Just wanted to check - is COMSOL only compatible with MATLAB codes?
Does anyone know if it is possible to import a Sysnoise code into COMSOL?
Cheers,
Eileen
Just wanted to check - is COMSOL only compatible with MATLAB codes?
Does anyone know if it is possible to import a Sysnoise code into COMSOL?
Cheers,
Eileen
1 Reply Last Post 29 déc. 2009, 05:17 UTC−5
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Posted:
1 decade ago
Hi
From what I know COMSOL interact with a few CAD via dll's to exchange geometry data, even bidirectionally; it interfaces with matlab, also via dll's, because it was initially written as a toolbox for matlab, hence have a similar internal syntax, and the data structures can be easily interfaced, this has evolved drastically the last years, and I believe COMSOL as fully independent of matlab today, but keeping a good link.
Comsol can further import mesh geometry, and partially transfor them into "COMSOL" geometry, such as node lists files, but also NASTRAN neutral files, this I have played with. For the latter the material properties, groups and other FEM structures etc are not well imported, specially for shell or beam elements, somewhat better for solids. Nothing for ANSYS exchange unfortunately.
So it depends how you want to interact with SYSNOISE, but I suspect you must write your translator yourself, at least then you know what it does.
Last time I tried to write a NASTRAN and ANSYS to Comsol translator I failed, in the sens, my large FEM files were to heavy, and the matlab code I used crashed the PC, so I came to the conclusion that I need to write it in C or a better low level code, basically it's "just" text parsing and data table lookup, with some logic above, but it gets quickly hughe in RAM requirements, when you have "real engineering" problems with complex geometries.
Good luck, and keep us informed if you find out more
Ivar
From what I know COMSOL interact with a few CAD via dll's to exchange geometry data, even bidirectionally; it interfaces with matlab, also via dll's, because it was initially written as a toolbox for matlab, hence have a similar internal syntax, and the data structures can be easily interfaced, this has evolved drastically the last years, and I believe COMSOL as fully independent of matlab today, but keeping a good link.
Comsol can further import mesh geometry, and partially transfor them into "COMSOL" geometry, such as node lists files, but also NASTRAN neutral files, this I have played with. For the latter the material properties, groups and other FEM structures etc are not well imported, specially for shell or beam elements, somewhat better for solids. Nothing for ANSYS exchange unfortunately.
So it depends how you want to interact with SYSNOISE, but I suspect you must write your translator yourself, at least then you know what it does.
Last time I tried to write a NASTRAN and ANSYS to Comsol translator I failed, in the sens, my large FEM files were to heavy, and the matlab code I used crashed the PC, so I came to the conclusion that I need to write it in C or a better low level code, basically it's "just" text parsing and data table lookup, with some logic above, but it gets quickly hughe in RAM requirements, when you have "real engineering" problems with complex geometries.
Good luck, and keep us informed if you find out more
Ivar