[insane]

Hi, everyone
Recently I am working on simulating a floating Object with 3-degree motion with RigidBodyMotion, but I have trouble in getting the motion amplitude and roll angle of the object. I have found there is a function object called SixDoFRigidBodyState, but it only works for SixDoFRigidBodyMotion, but I don't know if there any difference between those two libs, can someone tell me where can I find some script or tools to help me get the information?
Thanks in advance!

[Krapf]

Hi insane,

just a few days ago OpenFOAM.org added an equivalent functionObject for rigidBodyState: https://github.com/OpenFOAM/OpenFOAM...d19f6220801f09
So if you are able to use OpenFOAM-dev you could use this.

Kind regards,
Krapf

[insane]

Hi.Krapf
Thank you for your timely reply, it does help me a lot! I'm trying to compile in the present version.

[Thomas Caine]

Have you test it ?

[insane]

I have sucessfully achieve that in the latest version V1812 it works well

[tms120]

Originally Posted by insane

I have sucessfully achieve that in the latest version V1812 it works well

Hello, I have compiled it in v1906, still not producing the outputs. Can you please tell me the steps / files you compiled and how? I appreciate your help..

[insane]

1) download form the url Krapf put there
2) put the folder you download in the OpenFOAM src
3) modify the allwmake file add wmake $targetType rigidBodyState in the last
4) compile and fix it according to the compile information
the detail of the process I am not sure after such a long time
Good Luck!

[tms120]

Originally Posted by insane

1) download form the url Krapf put there
2) put the folder you download in the OpenFOAM src
3) modify the allwmake file add wmake $targetType rigidBodyState in the last
4) compile and fix it according to the compile information
the detail of the process I am not sure after such a long time
Good Luck!

Thanks for your reply... I actually followed the same what you mentioned here... after that it was showing an error on "not finding movingBodyNames", then I copied rigidBodyModel.H and rigidBodyModel.c in rigidBodyDynamics/rigidBodyModel/.. and then it compiled.

But when i run the tutorial "floatingObject", there was no data written in PostProcessing folder. The log.interFoam file states as follows:



Using #calc at line 50 in file "/home/tanvir/Tanvir_test_cases/floatingObject/constant/dynamicMeshDict.rigidBodyMotionCoeffs.bodies.float ingObject"
Using #codeStream with "/home/tanvir/Tanvir_test_cases/floatingObject/dynamicCode/platforms/linux64GccDPInt32Opt/lib/libcodeStream_61cbf2342e2af17e0533956d99753ec57f88 b4a3.so"
Creating new library in "dynamicCode/_61cbf2342e2af17e0533956d99753ec57f88b4a3/platforms/linux64GccDPInt32Opt/lib/libcodeStream_61cbf2342e2af17e0533956d99753ec57f88 b4a3.so"
Invoking wmake libso /home/tanvir/Tanvir_test_cases/floatingObject/dynamicCode/_61cbf2342e2af17e0533956d99753ec57f88b4a3
wmake libso /home/tanvir/Tanvir_test_cases/floatingObject/dynamicCode/_61cbf2342e2af17e0533956d99753ec57f88b4a3
ln: ./lnInclude
dep: codeStreamTemplate.C
Ctoo: codeStreamTemplate.C
ld: /home/tanvir/Tanvir_test_cases/floatingObject/dynamicCode/_61cbf2342e2af17e0533956d99753ec57f88b4a3/../platforms/linux64GccDPInt32Opt/lib/libcodeStream_61cbf2342e2af17e0533956d99753ec57f88 b4a3.so
Selecting dynamicFvMesh dynamicMotionSolverFvMesh
Using #calc at line 50 in file "/home/tanvir/Tanvir_test_cases/floatingObject/constant/dynamicMeshDict.rigidBodyMotionCoeffs.bodies.float ingObject"
Selecting motion solver: rigidBodyMotion
Using #calc at line 50 in file "/home/tanvir/Tanvir_test_cases/floatingObject/constant/dynamicMeshDict.rigidBodyMotionCoeffs.bodies.float ingObject"
Selecting rigidBodySolver Newmark




--> FOAM Warning :
Attempt to cast type rigidBodyMotion to type rigidBodyModel

From function To& Foam::refCast(From&) [with To = const Foam::RBD::rigidBodyMotion; From = const Foam::motionSolver]
in file /home/tanvir/OpenFOAM/OpenFOAM-v1906/src/OpenFOAM/lnInclude/typeInfo.H at line 138.
From function bool Foam::functionObjectList::read()
in file db/functionObjects/functionObjectList/functionObjectList.C at line 896

--> while loading function object 'rigidBodyState'


Thanks again...

[insane]

I am not sure if you add the corresponding functionObject in the controldict ? the template could be found in the .H file

[tms120]

Originally Posted by insane

I am not sure if you add the corresponding functionObject in the controldict ? the template could be found in the .H file

Yes I did.

rigidBodyState
{
type rigidBodyState;
libs ("librigidBodyState.so");
angleFormat degrees;
}

Did you make any changes in src/rigidBodyDynamics or src/rigidBodyMeshMotion folders? Can you run that tutorial with proper output?

[insane]

I guess you might have made some mistake in the compile procedure, I attach my RigidState file you can try to compile it to see if it works.
Good luck!

[tms120]

Originally Posted by insane

I guess you might have made some mistake in the compile procedure, I attach my RigidState file you can try to compile it to see if it works.
Good luck!

Thank you very much. Unfortunately still same thing... which version you using? I am using v1906.. thanks again..

When I compile your folder it shows error on "can't find 'BodyNames'..." which you must have solved as well... Is it possible to let me know your version and share your rigidBodyDynamics and rigidBodyMeshMotion folders as well. I again appreciate your help..

[insane]

Actually I am using this in OF1712 and OF1812 it all works.
Here are my two folders, you can try it again.
Good Luck!

[tms120]

Originally Posted by insane

Actually I am using this in OF1712 and OF1812 it all works.
Here are my two folders, you can try it again.
Good Luck!

Perfectly working. Thank you so much... much appreciated the way you shared...