A question regarding node picking

Alle Fragen zu: Vernetzung, Materialien, Lasten, Randbedingungen und Elementparameter /
All questions to: meshing, materials, boundary conditions and element properties

Moderatoren: ccad, mz15, auroraIco, Lehrstuhl

Antworten
Benutzeravatar
Sebastian
Preprocessor
Beiträge: 51
Registriert: Di 7. Feb 2012, 10:48
Wohnort: Cape Town, South Africa
Kontaktdaten:

A question regarding node picking

Beitrag von Sebastian »

Hello, I am new to FEA and started using Z88 only yesterday but I have a question regarding the picking of nodes for loads and constraints. Take the following as an example, a wine glass made from PS shown in cross-section:
Wine Glass cross section.png
(85.49 KiB) 993-mal heruntergeladen
and meshed:
Wine Glass mesh.png
(49.96 KiB) 993-mal heruntergeladen
Selecting the nodes in the 'cup' is simple enough but I am struggling to select the nodes of the contact area on the base of the stem, marked here in dark gray:
Wine Glass seating.png
(96.4 KiB) 993-mal heruntergeladen
Benutzeravatar
Sebastian
Preprocessor
Beiträge: 51
Registriert: Di 7. Feb 2012, 10:48
Wohnort: Cape Town, South Africa
Kontaktdaten:

Re: A question regarding node picking

Beitrag von Sebastian »

The nodes show up like this:
Wine Glass nodes.png
(142.41 KiB) 992-mal heruntergeladen
As you can see selecting individual nodes is impossibleas I can't tell one from the other. I was hoping that I could perhaps view the glass in a side view and select the bottom-most nodes by dragging a box with the mouse cursor but this doesn't seem to be possible. What is the best way to select these nodes?

Thanks
Benutzeravatar
Sebastian
Preprocessor
Beiträge: 51
Registriert: Di 7. Feb 2012, 10:48
Wohnort: Cape Town, South Africa
Kontaktdaten:

Re: A question regarding node picking

Beitrag von Sebastian »

Just visit the Z88 website and found this screenshot:
selection box.jpg
(208.91 KiB) 989-mal heruntergeladen
This is exactly what I want.
Benutzeravatar
mz15
Site Admin
Beiträge: 266
Registriert: Do 5. Aug 2010, 19:23

Re: A question regarding node picking

Beitrag von mz15 »

Hello Sebastian

You can draw a frame with the left shift key. But then all the nodes will be selected in the frame, not only at the surface.
If the points are to big, so you can't tell one from the other, decrease the size of the pionts with the Button I mark in the lower picture.
Additional you can zoom in so you can better differentiate between two points.

Sincerely
Markus Zimmermann
Dateianhänge
Untitled.png
(33.37 KiB) 1786-mal heruntergeladen
Benutzeravatar
Sebastian
Preprocessor
Beiträge: 51
Registriert: Di 7. Feb 2012, 10:48
Wohnort: Cape Town, South Africa
Kontaktdaten:

Re: A question regarding node picking

Beitrag von Sebastian »

Yeah, I finally figured that out. :oops:
mz15 hat geschrieben:If the points are to big, so you can't tell one from the other, decrease the size of the pionts with the Button I mark in the lower picture.
That is very cool. Thanks!
Benutzeravatar
mz15
Site Admin
Beiträge: 266
Registriert: Do 5. Aug 2010, 19:23

Re: A question regarding node picking

Beitrag von mz15 »

Hello Sebastian,

I am glad you have helped to.

Sincerely
Markus Zimmermann
Benutzeravatar
Sebastian
Preprocessor
Beiträge: 51
Registriert: Di 7. Feb 2012, 10:48
Wohnort: Cape Town, South Africa
Kontaktdaten:

Re: A question regarding node picking

Beitrag von Sebastian »

Another question: I can select nodes by using LMB and left shift to draw a window. Is there a way to deselect them using the same method?
Benutzeravatar
MNeidnicht
Alumni
Beiträge: 47
Registriert: Do 2. Sep 2010, 16:01

Re: A question regarding node picking

Beitrag von MNeidnicht »

Yes, it is. Use the "<"-key instead of shift. If you read the user's manual, you'll find this illustrated with many pictures. :shock:

Best regards
Martin Neidnicht
Benutzeravatar
Sebastian
Preprocessor
Beiträge: 51
Registriert: Di 7. Feb 2012, 10:48
Wohnort: Cape Town, South Africa
Kontaktdaten:

Re: A question regarding node picking

Beitrag von Sebastian »

:oops: Sorry, must've missed that...
Antworten