# Rizzo

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1. ## "hm_getdistance nodes" refere to single values

Hello at all, My Problem: have got two nodes (node 1 and node 2) --> node 1 is the reference for current position; node 2 is the reference for target position when using hm_getdistance nodes 1 2 0 , i get the following answer: 573.68267674323 495.66721 3.8981341703782e-014 288.8353 total distance x-distance y-distance z-distance I´ll put the values for total distance and x-, y-, z-distances in a subsequent command for translate a hole component from node1 to node 2. Therefore i need to create a vector with *createvector 1 \$x \$y \$z *translatemark components 1 1 \$total_distance 1 How can i get access or refer to the single values? Thanks for your help My latest try: *createmark components 1 "displayed" # *createmarkpanel nodes 1 "choose node 1" *createmark nodes 1 # *createmarkpanel nodes 2 "choose node 2" *createmark nodes 2 # set xVal [hm_getdistance nodes 1 2 dataname=x] set yVal [hm_getdistance nodes 1 2 dataname=y] set zVal [hm_getdistance nodes 1 2 dataname=z] set totVal [hm_getdistance nodes 1 2 dataname=tot] # *createvector 1 \$xVal \$yVal \$zVal *translatemark components 1 1 \$totVal the problem is the "dataname="
2. ## DOF only locked in one direction

Hello @ all, Is it possible to lock a DOF in only one direction/way? For example: I want to block a DOF in the 'minus x direction', but it should be able to move in the positiv way. Is it possible and how to do this? Thanks for your help. Greets, Thomas
3. ## interpretation of buckling/necking

Thanks to all. Now it works Thank you! Rizzo
4. ## differences between the pattern grouping modes

Ok, thanks at all for your tips. Greets
5. ## interpretation of buckling/necking

Hello at all, i made an analysis of a wireframe of a formula student car and created some loadcases for buckling. In HyperView there are some negative and some positive magnitudes for F (for buckling mode 4). I´m quite sure that this is the factor λ. So i thought if λ>0 (positiv) there is no buckling and if λ<0 (negativ) then there is buckling. Now i noticed, in every case where are the negative magnitudes, then a tension rod is buckling or deforming and when there is a positive magnitude then a pressure bar is buckling. I thought only rods/bars under pressure can buckle. My problem is to interpret these cases. Could it be that the buckling of a tension rod is a kind of neckling??? And when it is a kind of neckling, how to give an interpretation of the buckling? Why are tension rods are deforming in my buckling analysis? I hope you can help me. Regards, Rizzo
6. ## differences between the pattern grouping modes

Hello at all, during a topology optimization i wanted to add a pattern grouping to get symmetry. But i ´ve got the same results in 1-plns sym, 2-plns sym and 3-plns sym. So i can´t see the differences between the pattern grouping modes and how to use them correctly. Please, is there someone who could explain the different types of pattern grouping and their fields of application? Thanks a lot! Rizzo
7. ## Error # 6001, 2 vectors are defined on DTPL, 1 aligned

Thank you so much, now it works I was quite sure that i paid attention choosing the right nodes Thanks a lot, Greets
8. ## Error # 6001, 2 vectors are defined on DTPL, 1 aligned

Hello at all, during a topology optimization of a wireframe of a student racecar the check before optimizing gives the following error: A fatal error has been detected during input processing: *** ERROR # 6001 *** Two of the vectors defined on DTPL card 1 are aligned. I don´t know what to do now. At the end of this text i add a dropbox link to my hm-file, so maybe someone of you can have a look and give me tipps to solve my prob. I guess it could be the connection between the beams (1D) and the design space (solid). i equivalenced them with the equivalence function (in menu SHIFT+F3) in compliance with a small warpage. Maybe the local vectors of the beams are incorrect now. I don´t have any idea. I hope there is someone can help me. greets, Thomas https://www.dropbox.com/s/evz55axqz5ru4r0/TEST_MOdell_7.hm?dl=0
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