#### Topic: boundary constraints

Hi oofem folks,

attached a simple cube with 4 node loades. Two things I do not understand ...

- line 97:
BoundaryCondition 1  loadTimeFunction 1  dofs 3 1 2 3  values 1 0.0  set 2

What does the "values 1 0.0" stands for?

- instead of the 4 node loads I would like to use a surface load by "ConstantSurfaceLoad" I could not find an example and thus I failed to add such an surface load.

Thanks in advance for any help, Bernd

#### Re: boundary constraints

Hi,

you can find attached an example with surface load. Set 4 contains element numbers and number of the surface where the load is applied. That is element  11 and its 4th surface, element 12, 4th surface, element 13 and its 3rd surface and so on. You can find surface numbering here http://www.oofem.org/resources/doc/elem … 3-420002.8

The values keyword serves for prescribing boundary condition. You set it to zero, that is the nodes in set 2 are fixed, but you can also prescribe a non-zero value. BTW, the correct record in your case should be values 3 0 0 0, i.e., the same length as the dofs record and it prescribes zero for each dof.

#### Re: boundary constraints

Hi nitramkaroh,

, this worked out very well. Got the points and understood how it works.

cheers bernd