## General Mechanical

#### How to control the DOF of a line Body Beam

• Masri
Subscriber

Hi Guys,

I wanted to study a line body beam under Buckling, How can I control the Degree of Freedom of this line Body???

For example, I want to prevent the line Body from moving on the Z axis (As shown in Pics)

Regards

Masri

• peteroznewman
Subscriber

The Z direction is the first buckling mode. Why do you want to prevent that?

You can assign a Displacement boundary condition of Z = 0 to the line body, then the beam will buckle in the Y direction.

• Masri
Subscriber

Hi Peter

thnx for replying....Actually that's exactly what I want

i want to prevent it from moving in  the Z diretion ...then i wanna prevent it from moving in Y direction In order to set he value of each load multiplier these cases

-Buckling in Z direction

-Buckling in Y direction

but how can i make that in Ansys???

beam is defind as line body ...

the first end is  defined through Remote Displacement

(Displacement X Y and Z are 0 , Rotation X is 0 ,Rotation Z and Y are free)

the second end is defined too through Remote displacement

(Displacement X is Free ,Y and Z are 0 , Rotation X is 0 ,Rotation Z and Y are free)....

but unfortunately when i add the third
Remote displacement to prevent the all line Body from moving in Z direction I get an error message
(An unknown error occurred during solution.  Check the Solver Output on the Solution Information object for possible causes.)

and a warning message
(
One or more MPC contact regions or remote boundary conditions may have conflicts with other applied boundary conditions or other contact or symmetry regions. This may reduce solution accuracy. Tip: You may graphically display FE Connections from the Solution Information Object for non-cyclic analysis. Refer to Troubleshooting in the Help System for more details.)

and the eigenvalue Buckling could not be solved ....

Regards

Masri