Unsteady - Modal Coupling

Ko_Shine · November 16, 2018, 11:42

Hello,

I’ve been trying to run the FSI unsteady simulation using modal coupling method in FINE/Turbo (version 12.1). I used fct(time) to impose the generalized displacement for the mode shape. However, I got this message when I started the solver:

“! Error in the number of points for displacement profile, nData = 0”

What does this message exactly mean? I’ve given enough points for the displacement though.

I did run the same model using NLH method. There wasn’t any problem with that. The idea is to compare the two runs (unsteady and NLH). On a separate question, I’m also wondering if it is possible to change IBPA in unsteady mode in a same way as Harmonic mode.

Thank you.

AndrijaG · March 15, 2020, 20:32

Hey Ko_Shine,

did you solve the problem? I have the same problem and couldn't figure out how to fix it.

Best regards,
AndrijaG

Ko_Shine · March 16, 2020, 06:27

Hi,

Yeah I solved that problem more than one year ago. In my case, there were two groups of patches that were coupled sharing the same mode shape file. I needed to group them together as a single patch.

I hope it helps!

AndrijaG · March 16, 2020, 20:42

Hey Ko_Shine,

thanks for your fast response. I'll try to fix it with that hint. Thank you!

November 16, 2018, 11:42	Unsteady - Modal Coupling	#1
Ko_Shine Member Ko Shine Join Date: May 2018 Posts: 34 Rep Power: 8	Hello, I’ve been trying to run the FSI unsteady simulation using modal coupling method in FINE/Turbo (version 12.1). I used fct(time) to impose the generalized displacement for the mode shape. However, I got this message when I started the solver: “! Error in the number of points for displacement profile, nData = 0” What does this message exactly mean? I’ve given enough points for the displacement though. I did run the same model using NLH method. There wasn’t any problem with that. The idea is to compare the two runs (unsteady and NLH). On a separate question, I’m also wondering if it is possible to change IBPA in unsteady mode in a same way as Harmonic mode. Thank you. Last edited by Ko_Shine; November 17, 2018 at 06:51.

March 16, 2020, 06:27		#3
Ko_Shine Member Ko Shine Join Date: May 2018 Posts: 34 Rep Power: 8	Hi, Yeah I solved that problem more than one year ago. In my case, there were two groups of patches that were coupled sharing the same mode shape file. I needed to group them together as a single patch. I hope it helps! colinda1 likes this.

March 16, 2020, 20:42		#4
AndrijaG New Member Andrija Grbavac Join Date: Jun 2019 Posts: 4 Rep Power: 7	Hey Ko_Shine, thanks for your fast response. I'll try to fix it with that hint. Thank you! colinda1 likes this.

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March 15, 2020, 20:32		#2
AndrijaG New Member Andrija Grbavac Join Date: Jun 2019 Posts: 4 Rep Power: 7	Hey Ko_Shine, did you solve the problem? I have the same problem and couldn't figure out how to fix it. Best regards, AndrijaG