Search found 194 matches

by mika
28 Sep 2020, 13:07
Forum: Bug reports
Topic: zero**zero in ElementDescription.F90 [FIXED]
Replies: 2
Views: 969

Re: zero**zero in ElementDescription.F90

The devel version has now been updated to fix this.

Thanks for reporting,
Mika
by mika
25 Sep 2020, 13:16
Forum: ElmerSolver
Topic: structure frequency responses under vibration forces
Replies: 22
Views: 4440

Re: structure frequency responses under vibration forces

The issue with giving the imaginary part of a point load should now be resolved in the devel branch of the code repository. For example, if there exists a component variable "U Im 2", then the command "U 2 Load Im = Real ..." should define the imaginary part of the corresponding ...
by mika
24 Sep 2020, 15:36
Forum: General
Topic: Inductance Extraction (MagDyn2D, MagDynPost, Circuits & Dynamics)
Replies: 5
Views: 1414

Re: Inductance Extraction (MagDyn2D, MagDynPost, Circuits & Dynamics)

How about just setting "Permittivity = 0.0"? Then the total electromagnetic energy computed by the solver would be the magnetic energy.

-- Mika
by mika
18 Sep 2020, 16:22
Forum: ElmerSolver
Topic: structure frequency responses under vibration forces
Replies: 22
Views: 4440

Re: structure frequency responses under vibration forces

As it seems that a drilling rotation formulation may have a relative merit when the middle-surface is not smooth and the normal strain in the thickness direction is not of a primary interest, I updated the shell solver (in the devel branch) today to enable drilling degrees of freedom. With the new v...
by mika
16 Sep 2020, 09:25
Forum: General
Topic: total node number considered for solver
Replies: 2
Views: 1049

Re: total node number considered for solver

A variable (of type Variable_t) is associated with a permutation array showing whether this variable is active at a node and how the entries are mapped in the assembly. To see the number of DOFs which are active one may test

Code: Select all

COUNT( muVar % Perm > 0)
-- Mika
by mika
09 Sep 2020, 17:17
Forum: ElmerSolver
Topic: structure frequency responses under vibration forces
Replies: 22
Views: 4440

Re: structure frequency responses under vibration forces

Another question, how to set the damping value of the harmonic analysis? I just updated the source codes of both shell solvers in order to enable mass-proportional damping. If the material section has the command Rayleigh Damping Alpha = Real ... the solver should now create a damping matrix D = al...
by mika
04 Sep 2020, 13:07
Forum: ElmerSolver
Topic: structure frequency responses under vibration forces
Replies: 22
Views: 4440

Re: structure frequency responses under vibration forces

You are right. The facet shell solver wasn't updated to assemble the mass matrix when "Harmonic Mode" = True. This is now fixed in the devel repository. At the minimum FacetShellSolve.F90 has to be recompiled in order to try again.

-- Mika
by mika
02 Sep 2020, 15:46
Forum: ElmerSolver
Topic: structure frequency responses under vibration forces
Replies: 22
Views: 4440

Re: structure frequency responses under vibration forces

The assembly of beam sections was added into the shell solver only, so the facet shell solver doesn't understand beam sections.

-- Mika
by mika
02 Sep 2020, 14:17
Forum: ElmerSolver
Topic: structure frequency responses under vibration forces
Replies: 22
Views: 4440

Re: structure frequency responses under vibration forces

I see, with the "Harmonic Mode" keyword the frequency must be given in the solver section, so change the place of "Frequency" command. "Harmonic Mode" is not a very old option and hasn't probably been tested in all possible settings in a thorough manner. Some test probl...
by mika
02 Sep 2020, 11:19
Forum: ElmerSolver
Topic: structure frequency responses under vibration forces
Replies: 22
Views: 4440

Re: structure frequency responses under vibration forces

I think the limitation is again the inability to define an imaginary part of the load (to have this possible some structural solvers would need simple modifications which still wait). Otherwise the facet shell solver might work. I started from the test case PlatesHarmonic and modified it as in the a...