Discussion Closed This discussion was created more than 6 months ago and has been closed. To start a new discussion with a link back to this one, click here.

Cantilever beam with distributed load modeling

Please login with a confirmed email address before reporting spam

I want to simulate a cantilever beam fixed from one side and having a distributed load on one of its faces. I made a lot of changes and i simplified it very much, however i still receiving that error.

Error: 7248
Undefined value found

Exception:
com.femlab.jni.FlNativeException: Undefined value found Solvermodel
Messages:
Undefined value found Solvermodel

Stack trace:
at solvermodel.cpp, row 1808, (Undefined value found in the equation residual vector.
There are 352828 degrees of freedom giving NaN/Inf in the vector for the variable u
at coordinates: (1.24935e-005,9.51916e-005,0.00025), (9.99349e-006,9.76916e-005,0.00025), (1.06185e-005,9.36283e-005,0.00025), (9.98698e-006,9.53832e-005,0.00025), (7.48047e-006,9.55748e-005,0.00025), ...
There are 352828 degrees of freedom giving NaN/Inf in the vector for the variable v
at coordinates: (1.24935e-005,9.51916e-005,0.00025), (9.99349e-006,9.76916e-005,0.00025), (1.06185e-005,9.36283e-005,0.00025), (9.98698e-006,9.53832e-005,0.00025), (7.48047e-006,9.55748e-005,0.00025), ...
There are 352828 degrees of freedom giving NaN/Inf in the vector for the variable w
at coordinates: (1.24935e-005,9.51916e-005,0.00025), (9.99349e-006,9.76916e-005,0.00025), (1.06185e-005,9.36283e-005,0.00025), (9.98698e-006,9.53832e-005,0.00025), (7.48047e-006,9.55748e-005,0.00025), ...
)
at com.femlab.solver.FlSolver.femStatic(Native Method)
at com.femlab.solver.FemStatic.run(Unknown Source)
at com.femlab.server.FlRunner.run(Unknown Source)
at com.femlab.util.i.run(Unknown Source)
at com.femlab.util.ae.run(Unknown Source)

Please help me !

3 Replies Last Post 23 dic 2010, 09:24 GMT-5
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)

Please login with a confirmed email address before reporting spam

Posted: 1 decade ago 23 dic 2010, 03:04 GMT-5
Hi

this means, from my understanding, that your model is not fully defined, typically too few BC to have an unique solution

--
Good luck
Ivar
Hi this means, from my understanding, that your model is not fully defined, typically too few BC to have an unique solution -- Good luck Ivar

Please login with a confirmed email address before reporting spam

Posted: 1 decade ago 23 dic 2010, 07:59 GMT-5
I have defined one of the faces to be fixed, and all the remaining 5 faces to be free and one of them has a load on it.
what else i have to define.
I am appreciating your help.
I have defined one of the faces to be fixed, and all the remaining 5 faces to be free and one of them has a load on it. what else i have to define. I am appreciating your help.

Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)

Please login with a confirmed email address before reporting spam

Posted: 1 decade ago 23 dic 2010, 09:24 GMT-5
Hi

then check your material data if there is not a red flag therein, or if you do not have a domai or BC definition but wotout having selected correctly the items

--
Good luck
Ivar
Hi then check your material data if there is not a red flag therein, or if you do not have a domai or BC definition but wotout having selected correctly the items -- Good luck Ivar

Note that while COMSOL employees may participate in the discussion forum, COMSOL® software users who are on-subscription should submit their questions via the Support Center for a more comprehensive response from the Technical Support team.