How to Model a Hole in a Plate
Admin : Jun 16, 2011 12:00:00 AM
While RISA-3D (or RISA-2D) does not have an explicit tool to punch a hole in a plate, you can use the following steps to manually model them:
If you have ever tried to solve a two-dimensional model in RISA-3D, you have ultimately run into instabilities in your model because your model has no out of plane restraint.
To quickly lock your model out of plane, RISA-3D offers the ALL command in the Boundary Conditions spreadsheet. Type All in the Node Label cell and Reaction in the Z direction cell. This will restrain all nodes in your model from any translation in the Z direction.
This command will add a boundary condition to every joint for the translation or rotation that you specify. You will not see these boundary conditions graphically, but solving will show the instabilities are gone.
Solving P-Delta Divergences in RISA-3D
Admin : Nov 13, 2019 12:00:00 AM
In this video, you’ll learn how to investigate your RISA-3D model for P-Delta divergence errors. This type of error is common in general...
How Should I Model Boundary Conditions for a Truss in RISA-3D?
Admin : Dec 16, 2010 12:00:00 AM
When it comes to trusses in RISA-3D, boundary condition definitions (pin vs. roller) can make a huge difference. Let’s take an example of a...