Algor Processor Cannot Be Located

[mholland]

Hi!

I'm a complete newbie when it comes to Algor, I've just been having a play around trying to perform some modal analysis (linear, using natural frequency analysis type) on a brake disc.

I've given the disc a material (grey iron grade 30), an element type (brick) and meshed. I want the disc to be free to vibrate so there should be no constraints.

When I run the analysis it gives me the message "processor for this task cannot be located). Is it simply that I dont have the processor or am I making errors in the environment set-up?

Cheers,

Mat

 

[GBor]

Could be a couple of problems:

1) What Algor package do you have (Professional Linear, Static, MES, etc.)?

2) Have you selected "Modal Analysis" under the Analysis type?

3) Are you running a current version?

4) Are all of the .dll's properly registered (if you are unsure, there is a "regall.bat" or some kind of registration update batch file that you can run from the Algor installation subdirectory)?

 

[mholland]

Hey,

1) I'm using FEMPRO version 20.02

2) Analysis Type in the left-hand tree is <Natural Frequency (Modal)> is this correct analysis option?

3) As above, 20.02

4) I have just run the RegAll.bat file, it seems to have processed properly and shut down after completion.

Do I need to add any constraints or surface forces? My aim with this FE analysis is to verify the finidings of an experiment I'm performing using an impact hammer.
I have the disc simply supported on elastic bungees (these are to simulate free vibration).
Does this need to be inputted into the software or will it just run until it finds the number of modes I specify?

Best Regards

 

[GBor]

You do need some constraints to limit translation along each of the three primary axes. If you do not constrain the model through boundary conditions, you will get "Rigid Body Modes", which basically means that you will have infinite displacement along a particular axis. If you can imagine, there are 6 possibilities for this: x-, y-, and z-translations, and x-, y-, and z-rotations. If you restrict the translation through a pinned boundary condition on a particular surface, or pin a series of nodes along an edge, you will probably get an answer. To get the "right" answer, however, you need to properly simulate the boundary conditions that existed for any testing that you are trying to simulate. Contraints for a brake disc should probably be traslational constraints near the hub of the disc, but I would have to think about it more to be sure.

 

[mholland]

Thanks for your assistance GBor.

 

[GBor]

Sorry we couldn't figure out your problems. Without some additional details, it is difficult to determine why your software isn't running properly and, in the end, I'm not the best diagnostician for software installation problems...

Garland E. Borowski, PE
Star Aviation

 

[Mesher622]

How many modes are you solving for???

You can determine this by going to the analysis parameters for natural frequency (modal) analysis.

If you do not have any constraints you will want to solve for more than the standard 5 modes. You are permitted to analyze the model without constraints you simply need to tell the software that you are doing this. Check the option to allow rigid body modes in the analysis parameters. Also, the first 6 modes will be rigid body modes if you analyze it this way. You will want to solve for more than six to determine the bending modes.... etc...

--DE