How to define the rotation center of a floating object？

chao

Hi all,

I want to simulate a rectangle floating box interacts with water, and the center of rotation is outside the box

The operations <translationDOF > and <rotationDOF > can be used to restrain some of the six degrees of freedom( DOF)，but it doesn't meet the requirements of simulation.

Does anybody can know how to define the rotation center of a floating object? Or have I misread some operations in XML file?

the other small question.

There is an Invalid formula displaied in page 136 of XML GUIDE v5.0.pdf. I find that it works in Chrome, Microsoft Edge and Mendeley, but something wrong with Adobe Acrobat DC and Internet Explorer. Maybe it has something wrong with my software or  the type of font I have installed I guess.

Kind regards

Asalih3d

Is this what you need?

Kind regards

Alex

Exactly: using "center" in the XML you can imposte the coordinates so that the initial center will be there!

Regards

chao

https://forums.dual.sphysics.org/discussion/comment/3858#Comment_3858

I have using it , but it's seems that the center is used to define the gravity center of the rigid object.

In my simulation, the gravity center is still in geometric center and the rotatioin center has a different coordinate with gravity center.

Kind regards

chao

https://forums.dual.sphysics.org/discussion/comment/3857#Comment_3857

What I need is a little bit like eccentric rotation rather than defining gravity center. Is it possible？

Kind regards