Constrained Motion

amir

Hi
In a 2D simulation of a floating body, How can I fix the body in the x direction?
In other words, how can I restrict the sway motion?

Alex

You have to modify the source code
You can also play with unrealistic values of the center of gravity, but the best option is to cancel forces in X direction acting on the floating body

Regards

amir

Thanks Alex!
1) Is there any easier solution instead of modifying the code?
2) How the inertia matrix (v11, v12, ..., v33) is computed?
Thanks

Alex

the inertia can be defined by the user...
... see the output XML (or CaseTemplate) to check the format

center x="Ixx" y="Iyy" z="Izz" units_comment="metres (m)"

amir

But if we do not define the inertia, the Gencase will compute it.
I want to know the formulas of the inertia to check it.