Creation of Sinusoidal Geometry in ANSYS APDL
If modelling in APDL is not necessary, you should try out Spaceclaim , there is a equation feature, thru which U can create smooth sine curve. See attached Screenshot
See the below link to turn on this option
https://forum.ansys.com/forums/topic/no-option-for-equation-in-sketcher-of-spaceclaim/
-----Original Message-----
From: arsalaan_2020bciv010@nitsri.ac.in arsalaan_2020bciv010@nitsri.ac.in
Sent: 13 September 2023 22:23
To: xansys-temp@list.xansys.org
Subject: [Xansys] Re: Creation of Sinusoidal Geometry in ANSYS APDL
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Thank you, for your responses. I’ll look into the spline feature for generation of the sine wave. In the mean, should any new strategy emerge, I would appreciate being informed about that.
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Thank you for the advice. But due to some constraints in the project I cannot shift to Spaceclaim. I was hoping to find some equation like feature in ANSYS APDL itself or a method for creating high resolution sine wave by using only a limited number of key points such that there is no kink in the geometry.
Sorry to bother you guys again. As suggested by Anjum I was exploring spline option in conjunction with arcs for creation of sin wave. But I was not able to find any documentation which explicitly classified the spline feature in ANSYS APDL as C1 or C2. I would greatly appreciate any guidance or information on this matter.
Macro from a buddy of mine....
!/nopr
!
!
/nopr
!
! lregen.mac a macro to recreate the selected lines.
! 82 points are created to describe
! the new line.
!
! useage: lregen,# of keypoints used for new spline
! (controls the polynomial order of the line -
! higher the order more accuracy for complex
! curves, but more computational time for area
! generation etc.)
!
! BY: John Crawford Updated: 2/96
!
! Development needed: GET original line end slopes and use at
! spline ends.
!
! lnum = number of originally selected lines
! lmax = max line ID number in the original set
! kmax = max kp ID number in the original set
!
! make sure we're in prep7
!/prep7
! create the new line
!
cm,QWERTY,kp
*if,arg1,gt,2,then
ksel,r,,,arg1,arg2
*endif
*get,nkps,kp,,count
*if,nkps,gt,80,then
nkps=80
*endif
! figure out how many of the selected kpoints can be used (by position)
kpt=kpnext(0)
klast=kpt
count=1
*do,k,1,nkps-1
!/gopr
*if,kx(kpnext(kpt)),gt,kx(klast),then
count=count+1
klast=kpnext(kpt)
*endif
kpt=kpnext(kpt)
*enddo
!
flst,3,count,3
kpt=kpnext(0)
klast=kpt
fitem,3,kpt ! first keypoint
*do,kk,1,nkps-1
!/gopr
*if,kx(kpnext(kpt)),gt,kx(klast),then
fitem,3,kpnext(kpt)
klast=kpnext(kpt)
*endif
kpt=kpnext(kpt)
*enddo
!
! set the starting number for creating lines
!numstr,line,lineid
bsplin,,p51x
!
!*msg,info,lineid,j,lnum
!Just recreated spline %i , number %i of %i total splines
!
! finished creating this spline, go back to the top or quit
!*enddo
!
! delete unneeded keypoints
!kdel,kpmax+1,kpmax+arg1
!
! select the originally selected keypoints
!cmse,s,_zdummy
!
! delete the dummy set of keypoints
!cmde,_zdummy
! clean up various parameters
cmsel,,QWERTY
cmdele,QWERTY
csid=
i=
j=
kp1=
kp2=
kpmax=
lineid=
lmax=
count=
lnum=
ll=
k=
kk=
kpt=
/gopr
llist
-----Original Message-----
From: arsalaan_2020bciv010@nitsri.ac.in arsalaan_2020bciv010@nitsri.ac.in
Sent: Monday, September 18, 2023 7:54 AM
To: xansys-temp@list.xansys.org
Subject: EXT: [Xansys] Re: Creation of Sinusoidal Geometry in ANSYS APDL
WARNING: This email originated from outside of GE. Please validate the sender's email address before clicking on links or attachments as they may not be safe.
Sorry to bother you guys again. As suggested by Anjum I was exploring spline option in conjunction with arcs for creation of sin wave. But I was not able to find any documentation which explicitly classified the spline feature in ANSYS APDL as C1 or C2. I would greatly appreciate any guidance or information on this matter.
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Thank you for the macro. I will examine the code further to understand its functionality and see if I can implement it to create the desired spline.
One quick question - why splines - if really a true sine wave arcs ought to work and are easy to build.
-----Original Message-----
From: arsalaan_2020bciv010@nitsri.ac.in arsalaan_2020bciv010@nitsri.ac.in
Sent: Tuesday, September 12, 2023 4:07 PM
To: xansys-temp@list.xansys.org
Subject: EXT: [Xansys] Re: [External Email] Creation of Sinusoidal Geometry in ANSYS APDL
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Can you elaborate your suggestion a bit and explain how you would approach the problem. Are you hinting at creating multiple arcs to generate 1 sinusoidal wave?
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The two primary reasons motivating met to look at spline option along with arcs are:
-
ANSYS APDL doesn’t provide a direct option to create a sin wave.
-
Secondly creating sin waves using line segments increases the number of keypoints required for high resolution sin wave and also leads to formation of regular kinks at keypoints.
To address these issues, I am exploring the use of splines and arcs, as they offer a more efficient and smoother way to represent sinusoidal shapes while reducing the complexity associated with keypoints and kinks in the model.
So you think , you wont get kinks when you MESH your smooth sine wave model.
Welcome to Meshing world.
I would be happy to learn, how you do that.
-----Original Message-----
From: arsalaan_2020bciv010@nitsri.ac.in arsalaan_2020bciv010@nitsri.ac.in
Sent: 20 September 2023 18:59
To: xansys-temp@list.xansys.org
Subject: [Xansys] Re: [External Email] Creation of Sinusoidal Geometry in ANSYS APDL
This mail has been sent from an external source. Do not reply to it, or open any links/attachments unless you are sure of the sender's identity.
The two primary reasons motivating met to look at spline option along with arcs are:
-
ANSYS APDL doesn’t provide a direct option to create a sin wave.
-
Secondly creating sin waves using line segments increases the number of keypoints required for high resolution sin wave and also leads to formation of regular kinks at keypoints.
To address these issues, I am exploring the use of splines and arcs, as they offer a more efficient and smoother way to represent sinusoidal shapes while reducing the complexity associated with keypoints and kinks in the model.
Xansys mailing list -- xansys-temp@list.xansys.org To unsubscribe send an email to xansys-temp-leave@list.xansys.org If you are receiving too many emails from XANSYS please consider changing account settings to Digest mode which will send a single email per day.
Please send administrative requests such as deletion from XANSYS to xansys-mod@tynecomp.co.uk and not to the list
This message contains information that may be privileged or confidential and is the property of the Capgemini Group. It is intended only for the person to whom it is addressed. If you are not the intended recipient, you are not authorized to read, print, retain, copy, disseminate, distribute, or use this message or any part thereof. If you receive this message in error, please notify the sender immediately and delete all copies of this message.
I'm a novice in ANSYS APDL and FEM. This is my first hands on experience with ANSYS and clearly I've a steep learning curve ahead of me. Right now I'm in the stage of exploring different functions in ANSYS that might best suit my project and I know I will commit mistakes in this process. Hence, I joined XANSYS to take advice and guidance from ANSYS experts and I genuinely appreciate any help or assistance I receive from this platform.
As a beginner in this field, I would like to apologize for any errors I commit while communicating on this platform.