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SPC, MPC in FEMAP
- Thread starter Irwin
- Start date
But when you generate a parametric model, you modify the geometry, so, it would be more suitable to apply a load on geometric surfaces than on elements or nodes of mesh? But in such a case, whatever the modelling software used, is the mesh already attached to the geometric model, so that results could be realistic?
I am assuming that you want to apply SPC's for enforced motion. Constraints to ground are straight-forward and are applied by going to model, constraint, nodal, etc...
Also, I am also assuming that your want to apply mathematical MPC, and not rigid MPC's, as rigid MPC's are straight forward and are applied by going to model, element, rigid.
There is no easy way to use the FEMAP graphical user interface to define these types of elements. What I have done in the past is to create a NASTRAN bulk data deck for these elements and to read them in when you solve your model. You can do this by going to file, analyze and picking the "advanced" box. When you do this, FEMAP will allow you to enter files for executive & case control, as well as bulk data. When you get to the bulk data input window, check the box for "include file" or "type data" to read in your SPC or MPC data.
pj
Also, I am also assuming that your want to apply mathematical MPC, and not rigid MPC's, as rigid MPC's are straight forward and are applied by going to model, element, rigid.
There is no easy way to use the FEMAP graphical user interface to define these types of elements. What I have done in the past is to create a NASTRAN bulk data deck for these elements and to read them in when you solve your model. You can do this by going to file, analyze and picking the "advanced" box. When you do this, FEMAP will allow you to enter files for executive & case control, as well as bulk data. When you get to the bulk data input window, check the box for "include file" or "type data" to read in your SPC or MPC data.
pj
- Thread starter
- #4
Irwin,
You can model the constraint equations in the program, although I have never done it before. You can do this by going to "model, constraint, equation..." You will then get a menu where you can enter the independent node, DOF, coefficient, dependent nodes, etc. for the MPC. If you want the SPC, you will need to go to "model, load, nodal..", select your node, then you will get a menu where you can pick "enforced displacement" and then enter the displacement.
pj
You can model the constraint equations in the program, although I have never done it before. You can do this by going to "model, constraint, equation..." You will then get a menu where you can enter the independent node, DOF, coefficient, dependent nodes, etc. for the MPC. If you want the SPC, you will need to go to "model, load, nodal..", select your node, then you will get a menu where you can pick "enforced displacement" and then enter the displacement.
pj
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