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by makkemal
Wed Aug 26, 2015 7:34 am
Forum: FEM
Topic: Frequency analysis
Replies: 64
Views: 7587

Re: Frequency analysis

This is good work ! PrzemoF wrote: ... I'm also considering making ccxDatReader as there are some interesing information in the CalculiX .dat files. That will be very useful. Maybe Reading the outputs from the "*.dat" file to the Spreadsheet module ? That way manipulation of data as discussed earlie...
by makkemal
Mon Aug 24, 2015 12:11 pm
Forum: FEM
Topic: Frequency analysis
Replies: 64
Views: 7587

Re: Frequency analysis

Now the only point of plotting a mode shape is to create a pretty animation that help you understand how the part is deforming. If you use this analysis in a report you will only report the frequencies and mass participation factors. All the mass participation factors will be smaller than one. If yo...
by makkemal
Mon Aug 24, 2015 11:10 am
Forum: FEM
Topic: Frequency analysis
Replies: 64
Views: 7587

Re: Frequency analysis

Sorry a typo from me, the displacement value has no real meaning A friend of mine wrote this page to explain it to users of commercial software. https://esteq.co.za/2014/11/25/modal/ Read the section of what a mode shape is and what it is not What a mode is not: As mentioned before, a mode has a sha...
by makkemal
Mon Aug 24, 2015 6:49 am
Forum: FEM
Topic: Frequency analysis
Replies: 64
Views: 7587

Re: Frequency analysis

A frequency analysis is merely a eigenvalue solution to the stiffness matrix. The stiffness matrix is updated due to the constraints applied and the eigenvalue analysis applied to that matrix. The actual magnitude of the displacements have no real value except for interpretation relative to each oth...
by makkemal
Mon Aug 24, 2015 5:54 am
Forum: FEM
Topic: How approachable is the FEM development if starting from zero?
Replies: 6
Views: 1010

Re: How approachable is the FEM development if starting from zero?

Hi mviljamaa Personally I had No C++ experience, I have plenty of fortran/Matlab etc. I do however have plenty of FEA experience and know what features will be very useful etc. I have spent about 30 hours on my implementation over the last three months. (most of the time reading programming tutorial...
by makkemal
Wed Jul 29, 2015 4:57 am
Forum: FEM
Topic: Thermal FEM Analysis
Replies: 9
Views: 4464

Re: Thermal FEM Analysis

Except for node, elements, etc. This is what goes into the caculix input deck for steady state analysis To change it to a transient coupled analysis Change the following lines ** Coupled Temperature Solves Temperature and Stress field simultaneously *COUPLED TEMPERATURE-DISPLACEMENT 0.2,3000.0 ** Ma...
by makkemal
Tue Jul 14, 2015 4:45 am
Forum: FEM
Topic: Howto add a FEM constraint help please !
Replies: 2
Views: 783

Re: Howto add a FEM constraint help please !

Thanks
That clearly shows what needs to be changed.
Learning how to change it will take time but like i said I have to start at some point

Michael
by makkemal
Mon Jul 13, 2015 8:41 am
Forum: FEM
Topic: Howto add a FEM constraint help please !
Replies: 2
Views: 783

Howto add a FEM constraint help please !

I have been trying to add a constraint to the FEM workbench. I am however finding difficult to figure out all the components I need to add and how to do this. I am also not understanding the classes and definition ? (I am a Newby and have done Fortran coding but not C++ or object orientated) The onl...
by makkemal
Mon Jul 13, 2015 5:06 am
Forum: Install / Compile
Topic: Compile error windows MSVC 12 Newby help please
Replies: 2
Views: 535

Re: Compile error windows MSVC 12 Newby help please

I wiped my whole PC reinstalled everything form scratch and now it compiles
I still don't know why ?
by makkemal
Fri Jul 10, 2015 9:27 am
Forum: Install / Compile
Topic: Compile error windows MSVC 12 Newby help please
Replies: 2
Views: 535

Compile error windows MSVC 12 Newby help please

I have gone over the instructions on http://www.freecadweb.org/wiki/?title=CompileOnWindows I keep on getting the following syntax error during compile I have not changed any code the is the git default clone Please can someone assist I am trying to learn. Regards Michael >C:\Users\compile\Documents...

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