Question #378395 on Yade changed:
https://answers.launchpad.net/yade/+question/378395
Status: Open => Answered
Jan Stránský proposed the following answer:
Hello,
I just tried your script and it worked as expected, the sleeper stopped
after contact with ballast and also a force jump was recorded.. what
version of Yade do you use? I now used 2016-04-21 (not the newest one..)
cheers
Jan
2016-09-02 0:47 GMT+02:00 Weimin Song <question378...@answers.launchpad.net>
:
> New question #378395 on Yade:
> https://answers.launchpad.net/yade/+question/378395
>
> Dear all,
>
> I am running a similar simulation to [1], which is about the
> sleeper on ballast layer. I have two questions:
>
> (a) As said in [1], box can be used to model the sleeper,
> allowing the behavior as a dynamic body (dynamic=True,fixed=False). I put
> the sleeper above the ballast and gave sleeper velocity and set one max
> load, however, after the contact between sleeper and ballast, the sleeper
> does not move and there is no increase of the load (fz). How should I
> modify the code?
>
> (b) Besides the box, what can be used to model the sleeper
> better?
>
>
> #####compress.txt
> #format x_y_z_r
> 0.947086 0.831475 0.284021 0.0477039
> 0.450034 0.952387 0.120053 0.0476128
> 0.646373 0.618515 0.0409984 0.0409984
> 0.498326 0.563153 0.074989 0.0478509
> 0.323288 0.495 0.164916 0.0477942
> 0.93579 0.147124 0.398074 0.053411
> 0.83032 0.575083 0.0367456 0.0367457
> 0.480093 0.45683 0.225252 0.0421577
> 0.449375 0.903246 0.397459 0.0513119
> 0.138988 0.198482 0.168299 0.058746
> 0.306789 0.318781 0.0649523 0.0649523
> 0.693017 0.157485 0.0644752 0.0644753
> 0.649656 0.87162 0.265032 0.0480424
> 0.749124 0.225969 0.141352 0.0408891
> 0.68096 0.221957 0.311608 0.0474974
> 0.176216 0.386136 0.331596 0.0354314
> 0.468504 0.653722 0.121246 0.0502423
> 0.312465 0.191316 0.062637 0.0626371
> 0.346562 0.821341 0.0981689 0.0522149
> 0.951508 0.90208 0.148318 0.0449059
> 0.617955 0.602218 0.228009 0.0496856
> 0.160421 0.0357093 0.273775 0.0350106
> 0.39686 0.145847 0.303583 0.0423115
> 0.054697 0.860839 0.352874 0.0443734
> 0.340806 0.456822 0.359142 0.0620779
> 0.884794 0.286295 0.227674 0.0523843
> 0.129303 0.12767 0.241812 0.0420248
> 0.929743 0.446237 0.391947 0.0619074
> 0.581925 0.632365 0.326891 0.0414924
> 0.690471 0.755576 0.152238 0.047335
> 0.895328 0.187066 0.163544 0.064954
> 0.794705 0.499789 0.0364907 0.0364908
> 0.0619091 0.871396 0.0938363 0.058947
> 0.372246 0.364942 0.420368 0.0350741
> 0.894859 0.950734 0.366489 0.0467399
> 0.74198 0.889548 0.0377409 0.0377409
> 0.174689 0.405193 0.247011 0.0508009
> 0.188015 0.96039 0.146972 0.0396097
> 0.787366 0.939611 0.389144 0.0603188
> 0.347655 0.122137 0.394573 0.0580475
> 0.158852 0.203066 0.343461 0.0357254
> 0.123726 0.814216 0.179682 0.0482266
> 0.658175 0.696686 0.226838 0.0406917
> 0.765749 0.358235 0.148825 0.0404131
> 0.939201 0.466295 0.259859 0.0607987
> 0.957038 0.0424501 0.263338 0.0421011
> 0.150003 0.786254 0.388105 0.0557299
> 0.784285 0.251494 0.288619 0.0618017
> 0.416394 0.553035 0.1484 0.0626229
> 0.963509 0.611442 0.405887 0.0356438
> 0.324006 0.644522 0.394429 0.0510247
> 0.514523 0.723883 0.154689 0.0396758
> 0.792249 0.300144 0.201533 0.0375461
> 0.552467 0.861477 0.265064 0.0486583
> 0.617693 0.304028 0.314302 0.055041
> 0.671466 0.430064 0.189515 0.0558252
> 0.128094 0.703944 0.14021 0.0535805
> 0.342876 0.661106 0.144546 0.0380088
> 0.222793 0.462785 0.32049 0.0526685
> 0.494929 0.743023 0.0593009 0.0591999
> 0.595232 0.220057 0.0471151 0.0471151
> 0.947578 0.569841 0.168569 0.0469065
> 0.706965 0.597767 0.0888265 0.038932
> 0.713107 0.520495 0.0479858 0.0478411
> 0.234168 0.179433 0.302829 0.0413953
> 0.628693 0.262827 0.405714 0.0453377
> 0.86118 0.94027 0.0938651 0.0597297
> 0.240001 0.369939 0.134953 0.0444732
> 0.507675 0.245124 0.402008 0.0499993
> 0.592381 0.792342 0.111559 0.0436291
> 0.720738 0.587355 0.40626 0.0467056
> 0.397405 0.356544 0.0362316 0.0362316
> 0.420696 0.440849 0.0391549 0.0387864
> 0.060001 0.475249 0.237288 0.0599622
> 0.387668 0.124852 0.131674 0.0591788
> 0.520346 0.645345 0.0429898 0.0429898
> 0.520985 0.279778 0.312372 0.0446535
> 0.850381 0.414746 0.121207 0.0632809
> 0.774088 0.794743 0.0401247 0.0401247
> 0.738511 0.415946 0.31357 0.0617332
> 0.613828 0.793937 0.386986 0.0474196
> 0.189925 0.278124 0.277268 0.0644271
> 0.956033 0.962939 0.0935952 0.0370609
> 0.63864 0.157277 0.390086 0.0617935
> 0.074175 0.0467785 0.119684 0.0467785
> 0.489163 0.341346 0.40541 0.0462878
> 0.273976 0.50839 0.258966 0.0393711
> 0.103184 0.194786 0.404293 0.04597
> 0.285857 0.122722 0.136712 0.0417676
> 0.421312 0.811347 0.0418853 0.0418845
> 0.947906 0.731198 0.0518385 0.0516906
> 0.609461 0.394694 0.265059 0.0479474
> 0.841594 0.0486871 0.0583808 0.0486367
> 0.55703 0.126528 0.0510891 0.0504705
> 0.720166 0.733215 0.0395534 0.0375486
> 0.881003 0.504472 0.177329 0.0467903
> 0.83964 0.736185 0.392031 0.06062
> 0.822886 0.383668 0.235762 0.0549484
> 0.644354 0.535413 0.140565 0.0634611
> 0.0440037 0.956004 0.374548 0.0439868
> 0.142893 0.549818 0.0413219 0.0413219
> 0.766512 0.848358 0.0954289 0.0372682
> 0.15626 0.938958 0.0576143 0.0576143
> 0.682074 0.280082 0.0748855 0.058967
> 0.0487276 0.76617 0.376968 0.0470041
> 0.31279 0.170846 0.22424 0.0615935
> 0.261667 0.241248 0.346454 0.0379404
> 0.79808 0.333123 0.356939 0.0423478
> 0.26498 0.957781 0.173938 0.0419727
> 0.428987 0.770664 0.158345 0.0570391
> 0.109658 0.138081 0.324441 0.0421696
> 0.786733 0.155263 0.214251 0.0590249
> 0.124806 0.933025 0.212093 0.0551796
> 0.615401 0.921349 0.0457292 0.0457292
> 0.468293 0.935445 0.0380704 0.0380704
> 0.570912 0.70891 0.403116 0.0437944
> 0.433619 0.357361 0.173867 0.0562092
> 0.718661 0.65635 0.162817 0.0561648
> 0.666206 0.577882 0.316966 0.0541216
> 0.639935 0.643667 0.401098 0.0509298
> 0.739836 0.435393 0.0938615 0.0523595
> 0.709831 0.222572 0.21998 0.0432682
> 0.698288 0.945738 0.316163 0.0540886
> 0.487658 0.0569604 0.292981 0.0569561
> 0.816943 0.427709 0.399159 0.0525088
> 0.175262 0.705209 0.230481 0.0463205
> 0.273731 0.69764 0.317912 0.0544715
> 0.262037 0.350036 0.22476 0.0501155
> 0.824755 0.598848 0.156381 0.0645543
> 0.803654 0.540482 0.412004 0.045843
> 0.335023 0.577155 0.231942 0.0564453
> 0.935437 0.113196 0.0645519 0.0645519
> 0.493969 0.769779 0.38787 0.0550718
> 0.621934 0.695705 0.0984392 0.0582739
> 0.951959 0.642884 0.322787 0.047986
> 0.511392 0.275657 0.102785 0.0559607
> 0.504269 0.434819 0.0431251 0.0429722
> 0.581617 0.190581 0.291121 0.056271
> 0.75542 0.801927 0.236474 0.0355605
> 0.774215 0.491005 0.206962 0.064823
> 0.376667 0.554093 0.399621 0.0378678
> 0.248965 0.199349 0.139655 0.0374874
> 0.376264 0.390139 0.10343 0.0391088
> 0.354201 0.845411 0.398167 0.0513852
> 0.617438 0.254841 0.176361 0.0637425
> 0.123294 0.203773 0.262114 0.036519
> 0.938509 0.667157 0.216998 0.0611932
> 0.867437 0.511378 0.0359309 0.0359309
> 0.354525 0.405246 0.248278 0.0594617
> 0.679218 0.733356 0.408977 0.0429424
> 0.957806 0.89586 0.342881 0.039601
> 0.214137 0.1367 0.169846 0.0384377
> 0.530244 0.477588 0.139626 0.0591298
> 0.778987 0.628953 0.347985 0.0455466
> 0.536068 0.633774 0.419668 0.0359356
> 0.38568 0.0505655 0.323714 0.0494938
> 0.797126 0.850772 0.30323 0.0550926
> 0.74669 0.720872 0.327877 0.0519071
> 0.041566 0.0720553 0.041566 0.0415661
> 0.221666 0.887483 0.252023 0.0590311
> 0.329545 0.198873 0.328659 0.0429608
> 0.0474659 0.169442 0.252151 0.0467083
> 0.378417 0.593421 0.049742 0.049742
> 0.948306 0.885079 0.0516941 0.0516945
> 0.125395 0.0479353 0.198453 0.0471859
> 0.211407 0.0995264 0.268104 0.0464802
> 0.882682 0.688549 0.123939 0.0470169
> 0.60328 0.784425 0.212413 0.0499003
> 0.949945 0.74709 0.156035 0.0392864
> 0.575322 0.431565 0.356998 0.0538141
> 0.449242 0.631319 0.223169 0.0479868
> 0.0638226 0.657861 0.397682 0.0514515
> 0.360792 0.912251 0.0478495 0.0478495
> 0.177293 0.582602 0.132253 0.0594905
> 0.382335 0.73858 0.379773 0.0604821
> 0.21105 0.785124 0.143275 0.0507164
> 0.552041 0.362525 0.172563 0.0620264
> 0.0773323 0.265438 0.0712904 0.0633001
> 0.87013 0.396805 0.324698 0.0398678
> 0.138939 0.445323 0.392625 0.0573682
> 0.180511 0.500006 0.214455 0.0487276
> 0.115404 0.643359 0.0528443 0.0528443
> 0.582388 0.342819 0.406166 0.0466846
> 0.418946 0.301846 0.327761 0.0608555
> 0.356364 0.756159 0.251419 0.0613715
> 0.576311 0.513235 0.0484663 0.0484662
> 0.0408735 0.36165 0.0875356 0.0408624
> 0.514402 0.132975 0.393083 0.0619781
> 0.670612 0.362906 0.38157 0.0467236
> 0.0658148 0.459268 0.062868 0.0628679
> 0.670868 0.960603 0.408127 0.0365926
> 0.462716 0.0617661 0.0614297 0.0614298
> 0.799127 0.744663 0.169019 0.0631224
> 0.050484 0.881728 0.270497 0.0399161
> 0.303164 0.756663 0.0385943 0.0385943
> 0.470468 0.936758 0.275914 0.0630937
> 0.392995 0.0539297 0.219322 0.0536239
> 0.708805 0.048904 0.215345 0.0488984
> 0.125297 0.638052 0.31303 0.0543287
> 0.85406 0.347696 0.41219 0.0364822
> 0.0401791 0.199647 0.135567 0.0357042
> 0.495254 0.786871 0.245201 0.046628
> 0.840116 0.233834 0.396032 0.0561055
> 0.812202 0.138677 0.0467731 0.0466828
> 0.178033 0.356876 0.0564148 0.0564148
> 0.2743 0.957164 0.0393251 0.0393183
> 0.760255 0.138335 0.391451 0.0608448
> 0.452595 0.712892 0.295611 0.0520975
> 0.248872 0.753506 0.225917 0.0417314
> 0.218507 0.599688 0.251404 0.0637709
> 0.128878 0.288025 0.392788 0.0374351
> 0.444152 0.0471805 0.399912 0.0463479
> 0.469483 0.186987 0.0497104 0.0497104
> 0.879782 0.822066 0.115149 0.0609678
> 0.776462 0.668251 0.248614 0.0450083
> 0.190825 0.215004 0.0612952 0.0612952
> 0.408826 0.851182 0.236126 0.0476341
> 0.854052 0.126911 0.335561 0.0479448
> 0.869059 0.846831 0.224476 0.051641
> 0.179661 0.870705 0.139917 0.039936
> 0.455632 0.421401 0.103342 0.0355075
> 0.139049 0.326138 0.167129 0.0649209
> 0.6009 0.0640955 0.244275 0.0637124
> 0.943246 0.462465 0.0571582 0.0567518
> 0.200633 0.661293 0.395995 0.0563755
> 0.233342 0.114597 0.0626282 0.0473784
> 0.631185 0.893359 0.366355 0.0446465
> 0.498379 0.259589 0.214576 0.0577139
> 0.0634402 0.538456 0.386106 0.0620613
> 0.114337 0.643852 0.217734 0.0357355
> 0.325862 0.28513 0.398388 0.0539703
> 0.951275 0.357496 0.0865394 0.0455235
> 0.719768 0.830584 0.389993 0.062889
> 0.0375512 0.694996 0.0371376 0.0371376
> 0.526961 0.0358312 0.393412 0.0358034
> 0.678197 0.819779 0.0602074 0.0594118
> 0.436121 0.519552 0.0370167 0.0370167
> 0.938979 0.245846 0.0610174 0.0610174
> 0.749147 0.0592123 0.11438 0.0592123
> 0.945854 0.354108 0.285589 0.0540409
> 0.306062 0.669683 0.233597 0.0399931
> 0.0605116 0.606126 0.14542 0.0603474
> 0.751393 0.523098 0.316588 0.0462252
> 0.528032 0.859545 0.0612378 0.0612378
> 0.769387 0.915698 0.234384 0.0402417
> 0.567154 0.955642 0.396804 0.0443283
> 0.560521 0.778054 0.311381 0.0445815
> 0.106765 0.0575908 0.385103 0.0575618
> 0.496182 0.0881155 0.177893 0.0625782
> 0.139746 0.936131 0.329799 0.0635095
> 0.382021 0.639166 0.305163 0.0492684
> 0.0479288 0.122867 0.167316 0.0467446
> 0.0375975 0.697852 0.17058 0.0374879
> 0.893306 0.0611883 0.171366 0.0611778
> 0.513622 0.386562 0.274209 0.0486285
> 0.38362 0.722606 0.0694322 0.0534209
> 0.588699 0.948747 0.295502 0.05056
> 0.866555 0.856304 0.397272 0.053207
> 0.284035 0.832839 0.0364156 0.0364156
> 0.105862 0.769681 0.0557092 0.0557093
> 0.774949 0.342188 0.0545807 0.0545701
> 0.874298 0.609474 0.39892 0.0521287
> 0.674166 0.951026 0.215476 0.0487129
> 0.849495 0.293656 0.123138 0.0576814
> 0.229895 0.794712 0.313509 0.0521242
> 0.77832 0.65618 0.0582244 0.0582231
> 0.299272 0.608904 0.312503 0.0370809
> 0.356556 0.948112 0.387721 0.0517992
> 0.321539 0.279118 0.270218 0.052714
> 0.684991 0.0595354 0.333963 0.0593157
> 0.705759 0.847472 0.182374 0.0504684
> 0.134095 0.533776 0.296639 0.0514413
> 0.751609 0.678204 0.4113 0.0381799
> 0.282883 0.598547 0.0455272 0.0454016
> 0.404509 0.215583 0.402144 0.0497718
> 0.9025 0.202241 0.285561 0.0490817
> 0.224791 0.485636 0.413558 0.0397173
> 0.267824 0.361032 0.333768 0.0580376
> 0.933839 0.687528 0.403457 0.0456629
> 0.311674 0.739336 0.134996 0.0441211
> 0.479786 0.540574 0.228629 0.0402202
> 0.550537 0.689544 0.242969 0.0615045
> 0.436617 0.811993 0.320277 0.0431008
> 0.964183 0.538332 0.415268 0.0353617
> 0.121773 0.341018 0.317148 0.0364822
> 0.559415 0.169085 0.195469 0.0415248
> 0.15573 0.433081 0.120784 0.0413841
> 0.579205 0.602552 0.0892549 0.0432337
> 0.95901 0.743803 0.288571 0.0406291
> 0.279864 0.552308 0.37887 0.0521164
> 0.964972 0.559616 0.247982 0.0350256
> 0.354022 0.553964 0.324749 0.0385237
> 0.692896 0.792089 0.286435 0.0449748
> 0.2619 0.893302 0.102437 0.051295
> 0.439872 0.657727 0.0374133 0.0373887
> 0.0501457 0.566415 0.0466294 0.0466294
> 0.39902 0.248523 0.135621 0.0642131
> 0.844721 0.487881 0.317793 0.0521036
> 0.19449 0.831681 0.0524996 0.0524996
> 0.846843 0.739128 0.0496999 0.0496999
> 0.944749 0.783985 0.376702 0.0548595
> 0.130941 0.828011 0.282873 0.0532548
> 0.446215 0.411177 0.347588 0.0532031
> 0.605593 0.0554642 0.403268 0.0455625
> 0.726172 0.5874 0.236592 0.0442944
> 0.0382544 0.454681 0.335379 0.0377607
> 0.404913 0.227143 0.250327 0.047474
> 0.259408 0.260589 0.194349 0.0437369
> 0.0519195 0.587536 0.255879 0.0514326
> 0.695241 0.48926 0.394722 0.0551657
> 0.492347 0.864579 0.186414 0.0503525
> 0.292567 0.828304 0.188301 0.0518917
> 0.586287 0.349398 0.0581353 0.0581349
> 0.574272 0.500838 0.255124 0.0627199
> 0.913169 0.0485111 0.382136 0.0479869
> 0.748174 0.939146 0.135675 0.0607688
> 0.516086 0.797877 0.136104 0.0364826
> 0.0571913 0.358981 0.251247 0.0569603
> 0.795758 0.0570487 0.276563 0.0565297
> 0.93063 0.597776 0.0633083 0.0633083
> 0.645428 0.441282 0.0513466 0.0513466
> 0.821323 0.0533857 0.400228 0.0396113
> 0.536061 0.5847 0.171477 0.0513206
> 0.578524 0.545482 0.390884 0.0647998
> 0.3642 0.501402 0.0758633 0.0402604
> 0.729172 0.273279 0.396242 0.0557977
> 0.816512 0.861359 0.0384156 0.0384156
> 0.244274 0.49165 0.0900987 0.0610728
> 0.420132 0.144469 0.22398 0.0406167
> 0.2009 0.129507 0.388665 0.0593693
> 0.038574 0.90127 0.194248 0.0382819
> 0.336753 0.335666 0.166264 0.0396993
> 0.496279 0.163911 0.249942 0.0419252
> 0.964316 0.67205 0.120294 0.0356695
> 0.0646485 0.729238 0.263907 0.0646253
> 0.360451 0.837668 0.309454 0.0374163
> 0.0466874 0.775381 0.139081 0.0466874
> 0.871121 0.301455 0.321884 0.0415963
> 0.700753 0.957414 0.0417062 0.0417062
> 0.43389 0.861554 0.111414 0.0447848
> 0.744251 0.544441 0.126407 0.0362
> 0.875048 0.124469 0.250218 0.0390558
> 0.250832 0.440112 0.191688 0.0463824
> 0.691832 0.136408 0.259022 0.0455822
> 0.20292 0.0525438 0.136023 0.0524577
> 0.673776 0.371502 0.113292 0.0400885
> 0.283822 0.056032 0.208205 0.0560211
> 0.277663 0.037336 0.0854591 0.0372274
> 0.161845 0.468769 0.0362315 0.0362315
> 0.637948 0.71434 0.319593 0.0557768
> 0.782809 0.234698 0.0532504 0.053212
> 0.247376 0.668459 0.159386 0.0546081
> 0.842055 0.935684 0.195946 0.0442253
> 0.647634 0.141845 0.171252 0.0525951
> 0.173498 0.55765 0.396546 0.0490775
> 0.701696 0.326412 0.235664 0.0615893
> 0.959655 0.822516 0.18025 0.0401745
> 0.332867 0.928102 0.276877 0.0618501
> 0.322529 0.429395 0.047586 0.0475859
> 0.267188 0.751636 0.400834 0.0421299
> 0.958294 0.101816 0.318064 0.0386168
> 0.4037 0.500288 0.245931 0.0475698
> 0.465438 0.203807 0.324934 0.0470071
> 0.0640181 0.258529 0.321117 0.0634469
> 0.203929 0.241125 0.410656 0.0433524
> 0.0518465 0.257147 0.202856 0.0518408
> 0.356452 0.915583 0.158084 0.0598963
> 0.0593948 0.360993 0.388828 0.0582729
> 0.0478509 0.158847 0.0615574 0.0477201
> 0.941852 0.546617 0.334526 0.0485028
> 0.15051 0.052037 0.0490699 0.0490699
> 0.858055 0.597587 0.280627 0.0625559
> 0.956573 0.14004 0.239474 0.0429311
> 0.861144 0.746539 0.272669 0.0571527
> 0.217364 0.714131 0.059367 0.0593671
> 0.337368 0.0834333 0.0467152 0.0467152
> 0.518457 0.955552 0.181542 0.0444168
> 0.834072 0.951194 0.286384 0.0464471
> 0.279538 0.0554101 0.333114 0.055395
> 0.520746 0.59304 0.281228 0.0443113
> 0.251931 0.896207 0.376812 0.0644046
> 0.444606 0.636574 0.395764 0.0562834
> 0.936804 0.93687 0.25046 0.0631158
> 0.656556 0.0486756 0.0362033 0.0362033
> 0.459477 0.527526 0.344566 0.06382
> 0.0410512 0.822467 0.212974 0.0410296
> 0.0385739 0.961151 0.123682 0.0383284
> 0.0402043 0.958908 0.252648 0.0399635
> 0.112921 0.50229 0.149713 0.0448907
> 0.603093 0.888281 0.156609 0.0628658
> 0.156189 0.728352 0.315501 0.0366034
> 0.942989 0.325016 0.39185 0.0556502
> 0.95288 0.421076 0.160895 0.0467776
> 0.543891 0.863118 0.396372 0.0510769
> 0.0585283 0.0594232 0.279523 0.0585283
> 0.475318 0.343097 0.041739 0.0412125
> 0.042977 0.134912 0.377376 0.0429572
> 0.0442115 0.411645 0.15631 0.0442115
>
>
>
> from yade import pack, plot, export, ymport
>
> aggregate=O.materials.append(FrictMat(density=3e3, young=30e9,poisson=.3,
> frictionAngle=.5,label="aggregate"))
> O.bodies.append(geom.facetBox((.5,.5,.5),(.5,.5,.5),wallMask=31))
>
> sp=pack.SpherePack()
> O.bodies.append(ymport.text('compress.txt'))
> sp.toSimulation(material=aggregate)
>
> boxMat=O.materials.append(FrictMat(density=4e3, young=500e9, poisson=0.1,
> frictionAngle=0.5, label="boxMat"))
>
> O.engines=[
> ForceResetter(),
> InsertionSortCollider([Bo1_Sphere_Aabb(),Bo1_Facet_Aabb()
> ,Bo1_Box_Aabb()]),
> InteractionLoop(
> [Ig2_Sphere_Sphere_ScGeom(),Ig2_Facet_Sphere_ScGeom(),Ig2_
> Box_Sphere_ScGeom()],
> [Ip2_FrictMat_FrictMat_FrictPhys()],
> [Law2_ScGeom_FrictPhys_CundallStrack()]
> ),
> NewtonIntegrator(gravity=(0,0,-9.81),damping=0.5),
> PyRunner(command='checkUnbalanced()',realPeriod=2,label='checker'),
> ]
> O.dt=.5*PWaveTimeStep()
>
>
> def checkUnbalanced():
> if O.iter<10000: return
> if unbalancedForce()>0.3: return
> O.bodies.append(box((.5,.5,1.05),(0.1,0.2,0.05),orientation=Quaternion((1,
> 0, 0), 0), dynamic=True, fixed=False, wire=False, color=(0.5,0.5,0.5),
> highlight=False, material=boxMat))
> global BOX
> BOX=O.bodies[-1]
> BOX.state.vel=(0,0,-.4)
> O.engines=O.engines+[PyRunner(command='addPlotData()',iterPeriod=50)]
> checker.command='unloadBox()'
>
> def unloadBox():
> if abs(O.forces.f(BOX.id)[2])>2e8:
> plot.saveDataTxt('2.txt')
> O.pause()
>
>
> def addPlotData():
> if not isinstance(O.bodies[-1].shape,Box):
> plot.addData(); return
> Fz=O.forces.f(BOX.id)[2]
> plot.addData(Fz=Fz,w=BOX.state.pos[2]-BOX.state.refPos[
> 2],unbalanced=unbalancedForce(),i=O.iter)
>
> # besides unbalanced force evolution, also plot the displacement-force
> diagram
> plot.plots={'i':('unbalanced',),'w':('Fz',)}
> plot.plot()
>
>
>
>
> [1] https://answers.launchpad.net/yade/+question/230299
>
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