hard points

[volaff]

- Hello, I tried to change the location of the incriminated keypoints but when I do it comap the message: "keypoint (number) is associated with node 40117 and cannot be changed".

The message is always the same.

suggestions?

I tried in every way... even by hand!

 

[volaff]

or I had pleaded at the segeunte road.

I already have the defined model, meshato and loaded.

if with a text file type:

finish !esco from the environment in which I was first
/prep7 !entro in the preprocessing environment

*do,i,1,160! start cycle do with counter "i" from 1 to 160 (*)
ksel,s,,7699+i!select the keypont number 7699+i
ksel,a,,8699+i! also the keypont number 8699+i
nslk!select the knots attached to these keypoints
*get,n1,node,n,nxth!memorizzo in n1 the number of keypoints greater
*get,n2,node,n,nxtl!memorizzo in n2 the number of keypont minor
type,4!setto as current element type 4
e,n1,n2!creo an element between n1 and n2

*end

!(*) I carry out 160 times the sequence of operations between *do and *enddo varying "i"

I would make the index "high" correspondents to the "stored" rivets only get "right" rivets and then add, always with text files, the missing rivets? !

Maybe I'm saying a cavalry! ! !

 

[stefano.garbin]

but the model you already have beautiful and meshato already has riddles?
you have two mutually exclusive streets:
1-cancel mesh and make it completely correct
2-Delete areas, lines and keypoints and work only on nodes and elements (nmodif command)
The second is a mess.

 

[volaff]

I think I'm going to have to follow the first road, i.e. cancel the mesh.

yes the beautiful and meshato model already has twisted rivets (will be 8 or 9)
the problem will change the text file as I wrote above.

If I used the same file, I'd get the same result.
is there a way to skip an index in the cycle!?

Thank you very much, always kind!

 

[volaff]

my prof also supported option number 1 i.e. remake mesh properly.

In fact I have the model "only geometry" in which materials, section and keypoints are defined.

sec you how do you conveine proceed to create mesh to not make the same mistake as my predecessor? ?

 

[volaff]

I have a crazy headache.
sec me the answer is simple, but in these "conditions" I just can't see it! !

 

[volaff]

Hello.

from the documents that passed the prof I realized that the panel model was defined through section and that the procedure followed was more or less the following:

1.creation of the section
2.definition of material and real constant for each section
3.creation of hardkeypoints map for each section
4.meshatura of the section

I have noticed that the "roasted goods" are present in two, three sections.

I wondered if it was possible to "save" the mesh of the section that I do not have to change and to go to "clean" the section "incriminate" redefining the mesh of the same and those of the elements in contact.

ps: hardkeypoints I believe in any case that you agree not to touch them if they are related to deformation readings, vice versa you have to move if they are relative to beam that are to be moved.

is the procedure that I would like to follow sec you correct? ? ?

Have a good day!

 

[volaff]

I'm back.

I wanted to ask you which is the command to plot together keypoints (more precisely hardkeypoints) and areas as I would like to see the correspondence between aerr (defined through section).

to plot section 10, for example, use:

Asel,s,sec,10,

to plot its keupoints (of which I know the numbering), use:

ksel,s,kp, keypoint range)

As far as the plot rebounds, I can only plot separate areas and keypoints.

I was wondering if there was a command to plot them together.

Thank you all!

 

[stefano.garbin]

asel,s,sec,,10!selection areas
ksel,s,kp, range of keypoints!selection keypoints
/gtype,all,node,0!do not plot the knots
/gtype,all,elem,0!do not plot the elements
/gtype,all,keyp,1!plottare keypoints
/gtype,all,line,0!do not plot lines
/gtype,all,area,1!plottare areas
/gtype,all,volu,0!do not plot the volumes
gplot!comand to plot multiple entities

 

[volaff]

Thank you very much for the answer.

 

[volaff]

Hello, everyone!
I tried to go straighten those rivets that were crooked thinking the easiest way to do it.

in fact the elements were created with text files and many of the rivets created are "right" while someone (they will be 9/10 in a section) are wrong.

to avoid going to recreate(modify) the position of hardkeypoints (which correspond to the actual end position of rivets) as suggested stefano it is necessary to remake the mesh properly.

is it possible to go to select the mash of a sectione r ipulire only that? ? ?
i should select keypoints, lines and area of one section and clean that only.

hpo used the line:

Asel,s,sec,10,
aclear,all

so I removed the section 10 area by eliminating nodes and elements, but keeping kardkeypoints.

Now I have to go create the right rivets.

if I work with the same text files that passed the prof, I get the same result (of course).

I wondered if, at this point, it is not worth creating each knot (and then the elements) individually.

what would be the most gypsy and less honest road? ?

Thank you all!

 

[stefano.garbin]

a mesh is made of elements and knots!!! What sense would a set of points (nodes) untied among them?? ? ?
I would eliminate the wrong hardpoints and go to recreate them. Or I'd move them.
This means eliminating the mesh (or part of it) and then recreating it.

 

[volaff]

I'm sorry, maybe I felt bad.
I know that a mesh is made of knots and elements.

the position of some hardkeypoints is actually moved and then create the beam4 element between the two.

but I don't know what to use.
I know command to cancel but not to move.
in which chapter of the help are described or are almost the ones more at hand? ?

Thank you very much.

a last thing, as rivets connect two different sections, the meash cleaning must take place for both sections, right?

 

[stefano.garbin]

hardpoints should be deleted (hptdelete) and recreated (hptcreate).
the portion of mesh that must be regenerated is the one that contains the wrong hardpoints.

 

[volaff]

Thank you very much for the answer.
but the sections in question (which are two) spnp tied by rivets, in the end the mesh pilutira must reclaim both, right?

 

[volaff]

to erase wrong hardkeypoints and insert the right ones I wrote the following codie:

finish
/prep7
Asel,s,sec,10,
Asel,a,sec,11,
aplot

aclear,all

hptdelete, 7016
hptdelete, 7036
hptdelete, 7056
hptdelete, 7076
hptdelete, 7096


hptcreate, area , 230, 7016 , coord , 2050+17 , 907.4 , 0.70 ,
hptcreate, area , 230 , 7036 , coord , 2050+17 , 725.1 , 0.70 ,
hptcreate, area 230, 7056 , coord, 2050+17 , 725.1 , 0.70 ,
hptcreate, area , 230 , 7076 , coord , 2050+17 , 380.5 , 0.70 ,
hptcreate, area , 230 , 7096 , coord , 2050+17 , 208.2 , 0.70 ,


!asel,s,sec,,10!selection areas
!

Ksel,s,kp, ,7000,7432 !range of keypoints!selection keypoints
Ksel,a,kp,6000,6423
!/gtype,all,node,0
!/gtype,all,elem,0!do not plot the elements
!/gtype,all,keyp,1!
!/gtype,all,line,0!do not plot the lines
!/gtype,all,area,1!
!/gtype,all,volu,0!do not plot the volumes
!
kplot


In this case I have two problems:

1.for aclear,all that for hptdelete the software tells me " aclear is a not recognized begin command,abbreviation or macro. this command will be ignored.

2. once you clean the mesh of interested parties if I use the same command used to create the keiypoints (see above) it appears to me: "warning: hard point 7016 is not on area 230. the process continues with the project point".

Maybe this second warning depends on the fact that I cleaned up all the mesh?

thanks again and good day to all!

 

[volaff]

Hello everyone, solved the problem of mesh cleaning, I remain the second.

I can delete the hard points in incorrect position but if I want them to go to recreate in position!correct" through the commando:

hptcreate, area , 230, 7016 , coord , 2050+17 , 907.4 , 0.70 ,

the message:

"warning: hard point 7016 is not on area 230. the process continues with the project point"

maybe by area 230 you mean the mesh?? ?
Boh!
If so I would no longer have a knot at the hardpoints because now in the position I need, it is not in fact!

Have a good day!

 

[volaff]

I just don't understand the ratcreate warning.

in fact I have the situation in figure that tells me clearly that the hard points belongs to the area highlighted in yellow.

How can I prevent the warning that, in my opinion, seems to me "strange"?

 

[volaff]

stefano have news for me?

 

[stefano.garbin]

Am I becoming your personal advisor?
Try, try, try and try again.
verify the results of what you do and check if they are sensible.
If I am, give him warnings.