Convert Time Series to frequency series.

vari · June 16, 2016, 21:34

Hello,

I am using star ccm+ to calculate heave and pitch motions of a catamaran.The output plot is in time series. But, my teacher wants it in frequency series. I.e., I need to plot heave RAO and pitch RAO v/s encounter frequency. Can anybody help me with on as to how to proceed with this?

fluid23 · June 17, 2016, 09:07

You can perform a fast Fourier transform (FFT) on your data to convert from time domain to frequency domain. I believe that Star-CCM has an FFT option although I have never used it. You can also export your time domain data and transform it outside Star if necessary.

June 16, 2016, 21:34	Convert Time Series to frequency series.	#1
vari New Member Ari Join Date: May 2015 Posts: 6 Rep Power: 10	Hello, I am using star ccm+ to calculate heave and pitch motions of a catamaran.The output plot is in time series. But, my teacher wants it in frequency series. I.e., I need to plot heave RAO and pitch RAO v/s encounter frequency. Can anybody help me with on as to how to proceed with this?

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
[Other] Contribution a new utility: refine wall layer mesh based on yPlus field	lakeat	OpenFOAM Community Contributions	58	December 23, 2021 02:36
decomposePar problem: Cell 0contains face labels out of range	vaina74	OpenFOAM Pre-Processing	37	July 20, 2020 05:38
Sudden jump in Courant number	NJG	OpenFOAM Running, Solving & CFD	7	May 15, 2014 13:52
mixerVesselAMI2D's mass is not balancing	sharonyue	OpenFOAM Running, Solving & CFD	6	June 10, 2013 09:34
Could anybody help me see this error and give help	liugx212	OpenFOAM Running, Solving & CFD	3	January 4, 2006 18:07

June 17, 2016, 09:07		#2
fluid23 Senior Member Matt Join Date: Aug 2014 Posts: 947 Rep Power: 17	You can perform a fast Fourier transform (FFT) on your data to convert from time domain to frequency domain. I believe that Star-CCM has an FFT option although I have never used it. You can also export your time domain data and transform it outside Star if necessary.