[antieskmartin]

Hello all

when I was simulating the foil alone(open water

condition) which undergoes both translation and rotation. I have noticed that

the foil is slowly moving in the X direction(where x direction motion is

restricted). Actually, I have confused why it is happening. At the

start of the simulation both the lab and managed coordinates are at the

same point.

After iterating it seems there is slight change in the position of managed

coordinates while the lab coordinate is at the same location. Thus it causes

the foil to move out of the overlap region. I am attaching

the link of images

1.initial foil image.
https://antieskmartin.blogspot.com/2...tial-foil.html

2.foil after simulation.
https://antieskmartin.blogspot.com/2...imulation.html

3.Motion details
https://antieskmartin.blogspot.com/2...n-details.html


Could you please help me in figuring out the problem.

Thanks in advance.

[ashokac7]

Hard to understand you problem from given data. I had once face such situation. problem was with the co-ordinate system itself.

[antieskmartin]

Thank You, Ashok for you reply

Let me explain the problem briefly.

In the beginning, I choose two coordinate system where one is stationary other

is managed one. The foil is allowed to oscillate only in the Z direction. But I

found that after every oscillation the foil is moving slightly in the X direction. I

Can't figure out this error. Could you help me to rectify this?

Thanks in advance.

[pary07]

Hi,
The problem as to be with the coordinate system as ashok has stated. The managed coordinate that you have mentioned with respect to which the foil is moving is probably aligned incorrect. Try to do manual translation in the geometry by giving some input and check if the new translated location is aligned with its original position. How exactly have you created the managed co-ordinate system ?
Also, I cannot see the images that you have linked.

[antieskmartin]

Dear Paresh

Thanks for your reply

Here I am attaching the images

[antieskmartin]

Dear Paresh

Thanks for your reply

Here I am attaching the images

[ping]

i see in your motion setting that you have both the translation and rotation in the one motion and this is not correct for what you have asked for and clearly explains why you have the unwanted x motion
you need to first have just a translation motion and then superimposed on top of that motion you add the rotation as a new motion node feature as i explained in my other long post. this motion with be in a coordinate system that moves with the z motion ie a new one managed by the z motion
i would first just get the simple translation working with managing a coordinate system and ignore rotation and if that does not do what you want then you have a more basic issue