Frequency analysis

[sgrogan]

Hello Serchu, again.
Please see my other post. viewtopic.php?f=4&p=98825#p98825
This frequency analysis is in developement. It is not available in the windows snapshots or the Ubuntu PPA to test you need to compile PrzemoF's private github branch.
I can try to post some Windows builds later today if your interested. Let me know here.

[Serchu]

Dear Sgrogan, I'm very interesting in following the new characterisitics of the FEA module, if you can compile a Windows64 version every so on I will be very happy and serve you as tester.

[sgrogan]

Dear Sgrogan, I'm very interesting in following the new characteristics of the FEM module, if you can compile a Windows64 version every so on I will be very happy and serve you as tester.

I'm also a tester, not a developer. My "service" is to do some testing and offer my insights, sometimes brilliant , sometimes irrelevant.
Some Win builds for this branch can be found here:https://www.dropbox.com/sh/b2f3if41iww2 ... wpdba?dl=0

[Jee-Bee]

Oke how do i check which frequencies the mode shapes are??
I just started with a basic 4 times clamed square plate (200x200x2 mm) and only force normal pressure
According to my calculations the first six modeshapes are arround [437.46 892.31 892.31 1316.40 1599.61 1606.91] hz
I can't find that anywhere...

[PrzemoF]

Open .dat file in the calculation directory - the info you're looking for is there. FreeCAD is not importing it yet.

[Jee-Bee]

Don't see it
txt file is the dat file

[PrzemoF]

You didn't run frequency analysis, just normal static analysis. Can you send your FreeCAD version info?

[PrzemoF]

The .dat file is too big to post it, but that's what I got for your model:

Code: Select all

     E I G E N V A L U E   O U T P U T

 MODE NO    EIGENVALUE                       FREQUENCY   
                                     REAL PART            IMAGINARY PART
                           (RAD/TIME)      (CYCLES/TIME     (RAD/TIME)

      1   0.9214515E+07   0.3035542E+04   0.4831215E+03   0.0000000E+00
      2   0.4324221E+08   0.6575881E+04   0.1046584E+04   0.0000000E+00
      3   0.4524652E+08   0.6726553E+04   0.1070564E+04   0.0000000E+00
      4   0.1116733E+09   0.1056756E+05   0.1681879E+04   0.0000000E+00
      5   0.1752228E+09   0.1323717E+05   0.2106762E+04   0.0000000E+00
      6   0.1775699E+09   0.1332554E+05   0.2120825E+04   0.0000000E+00
      7   0.2977666E+09   0.1725592E+05   0.2746364E+04   0.0000000E+00
      8   0.3142493E+09   0.1772708E+05   0.2821352E+04   0.0000000E+00
      9   0.5699248E+09   0.2387310E+05   0.3799521E+04   0.0000000E+00
     10   0.6258365E+09   0.2501673E+05   0.3981535E+04   0.0000000E+00

     P A R T I C I P A T I O N   F A C T O R S

MODE NO.   X-COMPONENT     Y-COMPONENT     Z-COMPONENT     X-ROTATION      Y-ROTATION      Z-ROTATION

      1  -0.1101798E-07  -0.1483187E-06   0.1714749E-01  -0.7070093E-01  -0.2341264E-03  -0.4660632E-06
      2  -0.1451572E-06   0.2344101E-06  -0.9910787E-04  -0.5645843E+00  -0.5053591E+00   0.1455623E-05
      3   0.2309252E-06   0.1364810E-06   0.1752227E-03   0.5145110E+00  -0.5599058E+00  -0.3254505E-05
      4   0.6308117E-06  -0.5468559E-07   0.2221658E-03  -0.3193214E-02  -0.2470342E-02   0.1543172E-04
      5   0.1177178E-06   0.4889221E-06  -0.9959675E-02   0.4128305E-01  -0.2435800E-01   0.6536849E-06
      6  -0.7556868E-07  -0.3165870E-07  -0.4837509E-03  -0.1205624E-01   0.5071206E-02  -0.1258939E-04
      7   0.5082467E-07   0.3517168E-06   0.1182215E-03   0.4717605E-01  -0.3008922E+00   0.2818943E-04
      8   0.5943400E-06  -0.5377066E-06   0.1007970E-03   0.2957567E+00   0.7785357E-01  -0.7355986E-06
      9  -0.3385725E-06   0.2533214E-06   0.8146686E-03  -0.2277752E+00  -0.3590970E+00  -0.1507993E-04
     10  -0.1200800E-06   0.1962584E-07  -0.1195887E-02  -0.3538898E+00   0.2357888E+00  -0.8678511E-05

     E F F E C T I V E   M O D A L   M A S S

MODE NO.   X-COMPONENT     Y-COMPONENT     Z-COMPONENT     X-ROTATION      Y-ROTATION      Z-ROTATION

      1   0.1213958E-15   0.2199843E-13   0.2940364E-03   0.4998621E-02   0.5481517E-07   0.2172149E-12
      2   0.2107060E-13   0.5494811E-13   0.9822370E-08   0.3187555E+00   0.2553878E+00   0.2118839E-11
      3   0.5332645E-13   0.1862707E-13   0.3070300E-07   0.2647215E+00   0.3134945E+00   0.1059181E-10
      4   0.3979234E-12   0.2990514E-14   0.4935766E-07   0.1019662E-04   0.6102592E-05   0.2381380E-09
      5   0.1385748E-13   0.2390448E-12   0.9919513E-04   0.1704290E-02   0.5933124E-03   0.4273040E-12
      6   0.5710625E-14   0.1002273E-14   0.2340149E-06   0.1453530E-03   0.2571713E-04   0.1584928E-09
      7   0.2583147E-14   0.1237047E-12   0.1397632E-07   0.2225580E-02   0.9053613E-01   0.7946440E-09
      8   0.3532401E-12   0.2891284E-12   0.1016003E-07   0.8747205E-01   0.6061178E-02   0.5411053E-12
      9   0.1146314E-12   0.6417172E-13   0.6636849E-06   0.5188155E-01   0.1289507E+00   0.2274041E-09
     10   0.1441921E-13   0.3851735E-15   0.1430145E-05   0.1252380E+00   0.5559636E-01   0.7531656E-10
TOTAL     0.9768837E-12   0.8160013E-12   0.3956734E-03   0.8571526E+00   0.8506518E+00   0.1507892E-08

     T O T A L   E F F E C T I V E   M A S S

MODE NO.   X-COMPONENT     Y-COMPONENT     Z-COMPONENT     X-ROTATION      Y-ROTATION      Z-ROTATION

          0.5835370E-03   0.5835370E-03   0.5835370E-03   0.1793014E+01   0.1783589E+01   0.3575053E+01


                    E I G E N V A L U E    N U M B E R     1


 displacements (vx,vy,vz) for set NALL and time  0.1000000E+01

         1  0.000000E+00  0.000000E+00  0.000000E+00
         2  0.000000E+00  0.000000E+00  0.000000E+00
         3  0.000000E+00  0.000000E+00  0.000000E+00
         4  0.000000E+00  0.000000E+00  0.000000E+00
         5  0.000000E+00  0.000000E+00  0.000000E+00
         6  0.000000E+00  0.000000E+00  0.000000E+00
         [..]

[Jee-Bee]

OS: Ubuntu 15.04
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.16.Unknown
Build type: Unknown
Python version: 2.7.9
Qt version: 4.8.6
Coin version: 4.0.0a

As far as i can see know it didn't use my normal place... but can't find out(yet) where he put's the data...

[PrzemoF]

Set a directory in FEM Preferences. Did you compile FreeCAD yourself or it's a build by sgrogan?

Right now the frequency analysis is only in my github frequency branch:

OS: Linux
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.16.5423 (Git)
Build type: Unknown
Branch: frequency
Hash: 4946043643372d8a00f7a1dd625171661a86ff69
Python version: 2.7.8
Qt version: 4.8.6
Coin version: 3.1.3
OCC version: 6.7.1.oce-0.16