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How to load a group of sampling data as one parameter

Posted 15 feb 2012, 14:30 GMT-5 Acoustics & Vibrations, Parameters, Variables, & Functions Version 4.1 2 Replies

Xu Meng
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Dear All,

I have an experimental data saved in text files. (Pressure Vs. Time, sampling data)
I want to load/read this file as my source and assign it to one of my boundary.
Now I am using transient acoustic structure interface and I can easily give my time data in the study settings(0,1/99998-1, 1-1/99998 - 99998 is data length and unit in second). However, the pressure data is not linear or having an equation. Is there any way to read my pressure data?

I am trying to load txt in parameter but it looks like impossible. It has to be an equation or one constant.

Thanks a lot in advance for any suggestions.

I appreciate it.
Best
Xu
2 Replies Last Post 15 feb 2012, 18:07 GMT-5
Alexander Kuznetsov
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Posted: 1 decade ago 15 feb 2012, 16:42 GMT-5
I'm not sure it's what you exactly need, but try that:

In Model-Definitions create Functions-Interpolation. Then in Parameters choose Data Source:File and select your file.

This way you can define a function using your data file.
I'm not sure it's what you exactly need, but try that: In Model-Definitions create Functions-Interpolation. Then in Parameters choose Data Source:File and select your file. This way you can define a function using your data file.
Xu Meng
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Posted: 1 decade ago 15 feb 2012, 18:07 GMT-5
Dear Alexander,

Thanks a lot for your reply.
I will try what you said and let you know.

I have a pressure data as a function of time.
However, the pressure can not be written in a equation format (like random data).
So I can not write my own equation in Comsol. I am trying to see if I can upload all sampling data and save as one pressure parameter..


Thanks

Xu.
Dear Alexander, Thanks a lot for your reply. I will try what you said and let you know. I have a pressure data as a function of time. However, the pressure can not be written in a equation format (like random data). So I can not write my own equation in Comsol. I am trying to see if I can upload all sampling data and save as one pressure parameter.. Thanks Xu.

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