structure analysis for Axis symmetric component
Greetings,
I'm trying to perform structure analysis of axis symmetric component in optistruct as shown in figure 1. Figure 2 is full mode (without symmetry). If i apply pressure via PLOAD4 card in full mode case then what type of card i should use in case of axis symmetric.
Related .hm & .h3d are attached.
I tried 1st with PLOAD2 bcz these are 2d element but get zero displacement & stress. Then tried with PLOAD, PLOAD1, PLOAD4 but still unsolved.
<?xml version="1.0" encoding="UTF-8"?>
<?xml version="1.0" encoding="UTF-8"?>
Answers
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Hi,
it is suggested to use PLOADX1 to apply pressure on axisymmetric elements in this thread:
https://community.altair.com/community?id=community_question&sys_id=4986c83a1b2bd0908017dc61ec4bcb9d0 -
Thanks for reply,
I updated my element as CTAXI & defined control card. but getting error to solve.
*** ERROR # 1484 *** in the input data:
Field 2 contains embedded blank(s).Attaching related file.
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The following modeling errors were found and corrected:
1.CTAXI elements require PAXI property
2.Your model was setup in XY plane, but axisymmetric analysis should be in XZ plane so the model is rotated accordingly
3.For some reason all X nodal coordinates should be positive so the model was translated +10 units in X direction
4.PLOADX1 was incorrectly defined:
-PLOADX1 should be written in capital letters
-SID field was referencing cON, but should be fORCE load collector instead
-if the pressure load is to be applied to the top then wrong elements and nodes were referenced. Use Display numbers panel for help picking appropriate elements & nodes
-theta field was applying the load in transverse direction so it was adjusted in order to compress the member
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Hello Ivan,
Very thanks for such corrections. I was totally unaware to axis symmetry analysis. These point helped me.
After correcting these point still i'm getting same error. Plz let me know if anything else is to be incorrect.
Also i'm unable to open .hm file bcz of version of HM. I'm using HW 14. plz share .FEM file.
Modified file as per ur suggestions attached. Plz have a look.
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The bulk unsupported card input fields should be comma-separated:
PLOADX1,2,385,100,100,13110,13109,0
The FEM file is attached.
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Hi simon,
I tried to run ur Symm_edit1.fem input file, initially i got the negetive x grid points error because of co-ordinate system. I rectified that, but now im getting a error(PFA).
How could i overcome that, did u also faced the same problem?.
I have given the message below in bold texts.
Messages for the job:
*** ERROR # 6522 ***
The 2D mesh is not defined in the basic x-y or x-z plane.
*** Run terminated because of error(s) in the input data.0 -
Subash Karthikeyan said:
Hi simon,
I tried to run ur Symm_edit1.fem input file, initially i got the negetive x grid points error because of co-ordinate system. I rectified that, but now im getting a error(PFA).
How could i overcome that, did u also faced the same problem?.
I have given the message below in bold texts.
Messages for the job:
*** ERROR # 6522 ***
The 2D mesh is not defined in the basic x-y or x-z plane.
*** Run terminated because of error(s) in the input data.for your model, you need to change a few things:
1) your nodes are not exactly in the Y plane (Y coordinates are a little bit different than zero). Please project the nodes into the 0.0 y coordinate.
2) Your model has negative X node coordinates. Please, make sure the nodes are all in the positive X.
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