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November 15, 2017, 10:36
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Simple supported beam, incorrect solution
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#1 |
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New Member
DamianB
Join Date: Nov 2017
Posts: 1
Rep Power: 0  |
Hello!
I'm new to ANSYS and don't quite get along with this software. I'm trying to do a simple analysis of beam shown below.  I specified beam section with MM: Processor -> Sections -> Beam -> Common Sections and applied R=0.02257(which corresponds to A=0.0016), N=12, T=8. I keep getting this incorrect solution where beam is bending the opposite way than it's supposed to.  Here's my code: Code:
ENTER /SHOW,DEVICE-NAME TO ENABLE GRAPHIC DISPLAY
ENTER FINISH TO LEAVE PREP7
PRINTOUT KEY SET TO /GOPR (USE /NOPR TO SUPPRESS)
ELEMENT TYPE 1 IS BEAM188 3-D 2-NODE BEAM
KEYOPT( 1- 6)= 0 0 0 0 0 0
KEYOPT( 7-12)= 0 0 0 0 0 0
KEYOPT(13-18)= 0 0 0 0 0 0
CURRENT NODAL DOF SET IS UX UY UZ ROTX ROTY ROTZ
THREE-DIMENSIONAL MODEL
*** PROPERTY TEMPERATURE TABLE NUM. TEMPS= 1 ***
SLOC= 1 0.000000
PRINTOUT RESUMED BY /GOP
PROPERTY TABLE EX MAT= 1 NUM. POINTS= 1
SLOC= 1 0.2100000E+12
PROPERTY TABLE PRXY MAT= 1 NUM. POINTS= 1
SLOC= 1 0.3000000
ALL CURRENT ANSYS DATA WRITTEN TO FILE NAME= Assignment5_try4.db
FOR POSSIBLE RESUME FROM THIS POINT
PRODUCE NODAL PLOT IN DSYS= 0
INPUT SECTION ID NUMBER 1
INPUT SECTION TYPE BEAM
INPUT BEAM SECTION SUBTYPE Circular Solid
INPUT BEAM SECTION NAME
BEAM SECTION WITH SECTION ID NUMBER 1 IS OFFSET TO CENTROID
SECTION ID NUMBER IS: 1
BEAM SECTION TYPE IS: Circular Solid
BEAM SECTION NAME IS:
COMPUTED BEAM SECTION DATA SUMMARY:
Area = 0.16001E-02
Iyy = 0.20372E-06
Iyz = 0.97194E-23
Izz = 0.20372E-06
Warping Constant = 0.37199E-42
Torsion Constant = 0.40744E-06
Centroid Y = 0.41357E-18
Centroid Z =-0.15964E-17
Shear Center Y = 0.85597E-18
Shear Center Z = 0.33295E-18
Shear Correction-yy = 0.85698
Shear Correction-yz = 0.81254E-14
Shear Correction-zz = 0.85698
Beam Section is offset to CENTROID of cross section
KEYPOINT 1 X,Y,Z= 0.00000 0.00000 0.00000 IN CSYS= 0
PLOT KEY POINTS FROM 1 TO 1 BY 1
KEYPOINT 2 X,Y,Z= 10.0000 0.00000 0.00000 IN CSYS= 0
PLOT KEY POINTS FROM 1 TO 2 BY 1
KEYPOINT 3 X,Y,Z= 20.0000 0.00000 0.00000 IN CSYS= 0
PLOT KEY POINTS FROM 1 TO 3 BY 1
LINE CONNECTS KEYPOINTS 1 2
LINE NO.= 1 KP1= 1 TAN1= -1.0000 0.0000 0.0000
KP2= 2 TAN2= 1.0000 0.0000 0.0000
LINE CONNECTS KEYPOINTS 2 3
LINE NO.= 2 KP1= 2 TAN1= -1.0000 0.0000 0.0000
KP2= 3 TAN2= 1.0000 0.0000 0.0000
PLOT KEY POINTS FROM 1 TO 3 BY 1
SET DIVISIONS ON ALL PICKED LINES
TO NDIV = 10, SPACING RATIO = 1.000
NDIV AND SPACE CAN BE OVERRIDDEN FOR CURVATURE OR PROXIMITY
PLOT KEY POINTS FROM 1 TO 3 BY 1
GENERATE NODES AND ELEMENTS ON ALL PICKED LINES
NUMBER OF LINES MESHED = 2
MAXIMUM NODE NUMBER = 21
MAXIMUM ELEMENT NUMBER = 20
PRODUCE ELEMENT PLOT IN DSYS = 0
PRODUCE ELEMENT PLOT IN DSYS = 0
***** ROUTINE COMPLETED ***** CP = 42.859
***** ANSYS SOLUTION ROUTINE *****
PERFORM A STATIC ANALYSIS
THIS WILL BE A NEW ANALYSIS
KP NUMBERING KEY = 0
LINE NUMBERING KEY = 0
AREA NUMBERING KEY = 0
VOLU NUMBERING KEY = 0
NODE NUMBERING KEY = 1
TABN NUMBERING KEY = 0
SVAL NUMBERING KEY = 0
DOMA NUMBERING KEY = 0
NUMBER KEY SET TO 0 -1=NONE 0=BOTH 1=COLOR 2=NUMBER
ELEM NUMBERING KEY = 0
KP NUMBERING KEY = 1
LINE NUMBERING KEY = 0
AREA NUMBERING KEY = 0
VOLU NUMBERING KEY = 0
NODE NUMBERING KEY = 1
TABN NUMBERING KEY = 0
SVAL NUMBERING KEY = 0
DOMA NUMBERING KEY = 0
NUMBER KEY SET TO 0 -1=NONE 0=BOTH 1=COLOR 2=NUMBER
ELEM NUMBERING KEY = 0
KP NUMBERING KEY = 1
LINE NUMBERING KEY = 0
AREA NUMBERING KEY = 0
VOLU NUMBERING KEY = 0
NODE NUMBERING KEY = 1
TABN NUMBERING KEY = 0
SVAL NUMBERING KEY = 0
DOMA NUMBERING KEY = 0
NUMBER KEY SET TO 0 -1=NONE 0=BOTH 1=COLOR 2=NUMBER
ELEM NUMBERING KEY = 1
KP NUMBERING KEY = 1
LINE NUMBERING KEY = 0
AREA NUMBERING KEY = 0
VOLU NUMBERING KEY = 0
NODE NUMBERING KEY = 1
TABN NUMBERING KEY = 0
SVAL NUMBERING KEY = 0
DOMA NUMBERING KEY = 0
NUMBER KEY SET TO 0 -1=NONE 0=BOTH 1=COLOR 2=NUMBER
ELEM NUMBERING KEY = 0
DISTANCE MULTIPLIER FOR WINDOW 1 0.7290
DISTANCE FOR WINDOW 1 6.016
PRODUCE ELEMENT PLOT IN DSYS = 0
DISTANCE MULTIPLIER FOR WINDOW 1 1.372
DISTANCE FOR WINDOW 1 8.252
PRODUCE ELEMENT PLOT IN DSYS = 0
SPECIFIED CONSTRAINT UX FOR PICKED NODES
REAL= 0.00000000 IMAG= 0.00000000
ADDITIONAL DOFS= UY
ALL BOUNDARY CONDITION DISPLAY KEYS SET TO 1
SPECIFIED CONSTRAINT UX FOR PICKED NODES
REAL= 0.00000000 IMAG= 0.00000000
ADDITIONAL DOFS= UY UZ ROTX ROTY ROTZ
SPECIFIED SURFACE LOAD PRES FOR ALL PICKED BEAM ELEMENTS LKEY = 2
VALI,VALJ = -4000.0 -4000.0
PRES LOAD SURFACE DISPLAY KEY = 1
POINT LOAD ON ALL PICKED KEYPOINTS LOAD LABEL = FY
VALUES = -15000. 0.0000
Code:
PRINT U NODAL SOLUTION PER NODE
***** POST1 NODAL DEGREE OF FREEDOM LISTING *****
LOAD STEP= 0 SUBSTEP= 1
TIME= 1.0000 LOAD CASE= 0
THE FOLLOWING DEGREE OF FREEDOM RESULTS ARE IN THE GLOBAL COORDINATE SYSTEM
NODE UX UY UZ USUM
1 0.0000 29.352 0.0000 29.352
2 0.0000 0.0000 0.0000 0.0000
3 0.0000 28.247 0.0000 28.247
4 0.0000 26.860 0.0000 26.860
5 0.0000 24.980 0.0000 24.980
6 0.0000 22.492 0.0000 22.492
7 0.0000 19.370 0.0000 19.370
8 0.0000 15.686 0.0000 15.686
9 0.0000 11.603 0.0000 11.603
10 0.0000 7.3786 0.0000 7.3786
11 0.0000 3.3628 0.0000 3.3628
12 0.0000 0.0000 0.0000 0.0000
13 0.0000 -2.3608 0.0000 2.3608
14 0.0000 -3.7286 0.0000 3.7286
15 0.0000 -4.2790 0.0000 4.2790
16 0.0000 -4.1876 0.0000 4.1876
17 0.0000 -3.6302 0.0000 3.6302
18 0.0000 -2.7823 0.0000 2.7823
19 0.0000 -1.8197 0.0000 1.8197
20 0.0000 -0.91800 0.0000 0.91800
21 0.0000 -0.25288 0.0000 0.25288
MAXIMUM ABSOLUTE VALUES
NODE 0 1 0 1
VALUE 0.0000 29.352 0.0000 29.352
Can someone please tell me what I'm doing wrong? Thank You in advance! |
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