Posted by: Rueti
Load case result not the same - 11/30/09 04:43 AM
I am currently having force and wind load for my model. The total load cases are as below :
CASE 1 (HYD) WW+HP
Keep/Discard: Keep
Display: Disp/Force/Stress
Elastic Modulus: EC
Friction Mult.: 1.0000
Flg Analysis Temp: None
CASE 2 (OPE) W+T1+P1
Keep/Discard: Keep
Display: Disp/Force/Stress
Elastic Modulus: EC
Friction Mult.: 1.0000
Flg Analysis Temp: None
CASE 3 (OPE) W+T1+P1+F1
OPERATING CASE CONDITION 1
Keep/Discard: Keep
Display: Disp/Force/Stress
Elastic Modulus: EC
Friction Mult.: 1.0000
Flg Analysis Temp: None
CASE 4 (OPE) W+T1+P1+WIN1
Keep/Discard: Keep
Display: Disp/Force/Stress
Elastic Modulus: EC
Friction Mult.: 1.0000
Flg Analysis Temp: None
CASE 5 (OPE) W+T1+P1+WIN2
Keep/Discard: Keep
Display: Disp/Force/Stress
Elastic Modulus: EC
Friction Mult.: 1.0000
Flg Analysis Temp: None
CASE 6 (OPE) W+T1+P1+WIN3
Keep/Discard: Keep
Display: Disp/Force/Stress
Elastic Modulus: EC
Friction Mult.: 1.0000
Flg Analysis Temp: None
CASE 7 (OPE) W+T1+P1+WIN4
Keep/Discard: Keep
Display: Disp/Force/Stress
Elastic Modulus: EC
Friction Mult.: 1.0000
Flg Analysis Temp: None
CASE 8 (SUS) W+P1
Keep/Discard: Keep
Display: Disp/Force/Stress
Elastic Modulus: EC
Friction Mult.: 1.0000
Flg Analysis Temp: None
CASE 9 (EXP) L9=L2-L8
SUSTAINED CASE CONDITION 1
Keep/Discard: Keep
Display: Disp/Force/Stress
Combination Method: ALG
Flg Analysis Temp: None
CASE 10 (OCC) L10=L3-L2
EXPANSION CASE CONDITION 1
Keep/Discard: Keep
Display: Disp/Force/Stress
Combination Method: ALG
Flg Analysis Temp: None
CASE 11 (OCC) L11=L4-L2
Keep/Discard: Keep
Display: Disp/Force/Stress
Combination Method: ALG
OCC Load Factor: 0.0000
Flg Analysis Temp: None
CASE 12 (OCC) L12=L5-L2
Keep/Discard: Keep
Display: Disp/Force/Stress
Combination Method: ALG
OCC Load Factor: 0.0000
Flg Analysis Temp: None
CASE 13 (OCC) L13=L6-L2
Keep/Discard: Keep
Display: Disp/Force/Stress
Combination Method: ALG
OCC Load Factor: 0.0000
Flg Analysis Temp: None
CASE 14 (OCC) L14=L7-L2
Keep/Discard: Keep
Display: Disp/Force/Stress
Combination Method: ALG
OCC Load Factor: 0.0000
Flg Analysis Temp: None
CASE 15 (OCC) L15=L8+L10
Keep/Discard: Keep
Display: Disp/Force/Stress
Combination Method: SCALAR
OCC Load Factor: 0.0000
Flg Analysis Temp: None
CASE 16 (OCC) L16=L8+L11
Keep/Discard: Keep
Display: Disp/Force/Stress
Combination Method: SCALAR
OCC Load Factor: 0.0000
Flg Analysis Temp: None
CASE 17 (OCC) L17=L8+L12
Keep/Discard: Keep
Display: Disp/Force/Stress
Combination Method: SCALAR
OCC Load Factor: 0.0000
Flg Analysis Temp: None
CASE 18 (OCC) L18=L8+L13
Keep/Discard: Keep
Display: Disp/Force/Stress
Combination Method: SCALAR
OCC Load Factor: 0.0000
Flg Analysis Temp: None
CASE 19 (OCC) L19=L8+L14
Keep/Discard: Keep
Display: Disp/Force/Stress
Combination Method: SCALAR
OCC Load Factor: 0.0000
Flg Analysis Temp: None
I am focusing on CASE 15 which the stress checked FAILED as below :
CASE 15 (OCC) L15=L8+L10
Piping Code: B31.3 = B31.3 -2006, May 31, 2007
CODE STRESS CHECK FAILED : LOADCASE 15 (OCC) L15=L8+L10
Highest Stresses: (N./sq.mm. ) LOADCASE 15 (OCC) L15=L8+L10
CodeStress Ratio (%): 242.0 @Node 740
Code Stress: 323.5 Allowable: 133.7
Axial Stress: 41.3 @Node 370
Bending Stress: 289.2 @Node 740
Torsion Stress: 32.0 @Node 740
Hoop Stress: 85.1 @Node 370
3D Max Intensity: 365.9 @Node 740
And for the same model. I deleted all the wind loads and left only the force, as below :
CASE 1 (HYD) WW+HP
HYDRO TEST CASE
Keep/Discard: Keep
Display: Disp/Force/Stress
Elastic Modulus: EC
Friction Mult.: 1.0000
Flg Analysis Temp: None
CASE 2 (OPE) W+P1+F1
Keep/Discard: Keep
Display: Disp/Force/Stress
Elastic Modulus: EC
Friction Mult.: 1.0000
OCC Load Factor: 0.0000
Flg Analysis Temp: None
CASE 3 (OPE) W+T1+P1
OPERATING CASE CONDITION 1
Keep/Discard: Keep
Display: Disp/Force/Stress
Elastic Modulus: EC
Friction Mult.: 1.0000
Flg Analysis Temp: None
CASE 4 (SUS) W+P1
SUSTAINED CASE CONDITION 1
Keep/Discard: Keep
Display: Disp/Force/Stress
Elastic Modulus: EC
Friction Mult.: 1.0000
Flg Analysis Temp: None
CASE 5 (EXP) L5=L3-L4
EXPANSION CASE CONDITION 1
Keep/Discard: Keep
Display: Disp/Force/Stress
Combination Method: ALG
Flg Analysis Temp: None
CASE 6 (OCC) L6=L2-L4
Keep/Discard: Keep
Display: Disp/Force/Stress
Combination Method: ALG
OCC Load Factor: 0.0000
Flg Analysis Temp: None
CASE 7 (OCC) L7=L4+L6
Keep/Discard: Keep
Display: Disp/Force/Stress
Combination Method: SCALAR
OCC Load Factor: 0.0000
Flg Analysis Temp: None
CAESAR II LOAD CASE REPORT
While it shows the result CASE 7 as stress PASSED, as below :
CASE 7 (OCC) L7=L4+L6
Piping Code: B31.3 = B31.3 -2006, May 31, 2007
CODE STRESS CHECK PASSED : LOADCASE 7 (OCC) L7=L4+L6
Highest Stresses: (N./sq.mm. ) LOADCASE 7 (OCC) L7=L4+L6
CodeStress Ratio (%): 66.9 @Node 740
Code Stress: 89.4 Allowable: 133.7
Axial Stress: 41.2 @Node 370
Bending Stress: 111.4 @Node 799
Torsion Stress: 7.8 @Node 740
Hoop Stress: 85.1 @Node 370
3D Max Intensity: 126.9 @Node 740
3D Max Intensity: 126.9 @Node 740
Could you please explain on this ?
I have also sent you the C2 file via email.
Thank you very much
CASE 1 (HYD) WW+HP
Keep/Discard: Keep
Display: Disp/Force/Stress
Elastic Modulus: EC
Friction Mult.: 1.0000
Flg Analysis Temp: None
CASE 2 (OPE) W+T1+P1
Keep/Discard: Keep
Display: Disp/Force/Stress
Elastic Modulus: EC
Friction Mult.: 1.0000
Flg Analysis Temp: None
CASE 3 (OPE) W+T1+P1+F1
OPERATING CASE CONDITION 1
Keep/Discard: Keep
Display: Disp/Force/Stress
Elastic Modulus: EC
Friction Mult.: 1.0000
Flg Analysis Temp: None
CASE 4 (OPE) W+T1+P1+WIN1
Keep/Discard: Keep
Display: Disp/Force/Stress
Elastic Modulus: EC
Friction Mult.: 1.0000
Flg Analysis Temp: None
CASE 5 (OPE) W+T1+P1+WIN2
Keep/Discard: Keep
Display: Disp/Force/Stress
Elastic Modulus: EC
Friction Mult.: 1.0000
Flg Analysis Temp: None
CASE 6 (OPE) W+T1+P1+WIN3
Keep/Discard: Keep
Display: Disp/Force/Stress
Elastic Modulus: EC
Friction Mult.: 1.0000
Flg Analysis Temp: None
CASE 7 (OPE) W+T1+P1+WIN4
Keep/Discard: Keep
Display: Disp/Force/Stress
Elastic Modulus: EC
Friction Mult.: 1.0000
Flg Analysis Temp: None
CASE 8 (SUS) W+P1
Keep/Discard: Keep
Display: Disp/Force/Stress
Elastic Modulus: EC
Friction Mult.: 1.0000
Flg Analysis Temp: None
CASE 9 (EXP) L9=L2-L8
SUSTAINED CASE CONDITION 1
Keep/Discard: Keep
Display: Disp/Force/Stress
Combination Method: ALG
Flg Analysis Temp: None
CASE 10 (OCC) L10=L3-L2
EXPANSION CASE CONDITION 1
Keep/Discard: Keep
Display: Disp/Force/Stress
Combination Method: ALG
Flg Analysis Temp: None
CASE 11 (OCC) L11=L4-L2
Keep/Discard: Keep
Display: Disp/Force/Stress
Combination Method: ALG
OCC Load Factor: 0.0000
Flg Analysis Temp: None
CASE 12 (OCC) L12=L5-L2
Keep/Discard: Keep
Display: Disp/Force/Stress
Combination Method: ALG
OCC Load Factor: 0.0000
Flg Analysis Temp: None
CASE 13 (OCC) L13=L6-L2
Keep/Discard: Keep
Display: Disp/Force/Stress
Combination Method: ALG
OCC Load Factor: 0.0000
Flg Analysis Temp: None
CASE 14 (OCC) L14=L7-L2
Keep/Discard: Keep
Display: Disp/Force/Stress
Combination Method: ALG
OCC Load Factor: 0.0000
Flg Analysis Temp: None
CASE 15 (OCC) L15=L8+L10
Keep/Discard: Keep
Display: Disp/Force/Stress
Combination Method: SCALAR
OCC Load Factor: 0.0000
Flg Analysis Temp: None
CASE 16 (OCC) L16=L8+L11
Keep/Discard: Keep
Display: Disp/Force/Stress
Combination Method: SCALAR
OCC Load Factor: 0.0000
Flg Analysis Temp: None
CASE 17 (OCC) L17=L8+L12
Keep/Discard: Keep
Display: Disp/Force/Stress
Combination Method: SCALAR
OCC Load Factor: 0.0000
Flg Analysis Temp: None
CASE 18 (OCC) L18=L8+L13
Keep/Discard: Keep
Display: Disp/Force/Stress
Combination Method: SCALAR
OCC Load Factor: 0.0000
Flg Analysis Temp: None
CASE 19 (OCC) L19=L8+L14
Keep/Discard: Keep
Display: Disp/Force/Stress
Combination Method: SCALAR
OCC Load Factor: 0.0000
Flg Analysis Temp: None
I am focusing on CASE 15 which the stress checked FAILED as below :
CASE 15 (OCC) L15=L8+L10
Piping Code: B31.3 = B31.3 -2006, May 31, 2007
CODE STRESS CHECK FAILED : LOADCASE 15 (OCC) L15=L8+L10
Highest Stresses: (N./sq.mm. ) LOADCASE 15 (OCC) L15=L8+L10
CodeStress Ratio (%): 242.0 @Node 740
Code Stress: 323.5 Allowable: 133.7
Axial Stress: 41.3 @Node 370
Bending Stress: 289.2 @Node 740
Torsion Stress: 32.0 @Node 740
Hoop Stress: 85.1 @Node 370
3D Max Intensity: 365.9 @Node 740
And for the same model. I deleted all the wind loads and left only the force, as below :
CASE 1 (HYD) WW+HP
HYDRO TEST CASE
Keep/Discard: Keep
Display: Disp/Force/Stress
Elastic Modulus: EC
Friction Mult.: 1.0000
Flg Analysis Temp: None
CASE 2 (OPE) W+P1+F1
Keep/Discard: Keep
Display: Disp/Force/Stress
Elastic Modulus: EC
Friction Mult.: 1.0000
OCC Load Factor: 0.0000
Flg Analysis Temp: None
CASE 3 (OPE) W+T1+P1
OPERATING CASE CONDITION 1
Keep/Discard: Keep
Display: Disp/Force/Stress
Elastic Modulus: EC
Friction Mult.: 1.0000
Flg Analysis Temp: None
CASE 4 (SUS) W+P1
SUSTAINED CASE CONDITION 1
Keep/Discard: Keep
Display: Disp/Force/Stress
Elastic Modulus: EC
Friction Mult.: 1.0000
Flg Analysis Temp: None
CASE 5 (EXP) L5=L3-L4
EXPANSION CASE CONDITION 1
Keep/Discard: Keep
Display: Disp/Force/Stress
Combination Method: ALG
Flg Analysis Temp: None
CASE 6 (OCC) L6=L2-L4
Keep/Discard: Keep
Display: Disp/Force/Stress
Combination Method: ALG
OCC Load Factor: 0.0000
Flg Analysis Temp: None
CASE 7 (OCC) L7=L4+L6
Keep/Discard: Keep
Display: Disp/Force/Stress
Combination Method: SCALAR
OCC Load Factor: 0.0000
Flg Analysis Temp: None
CAESAR II LOAD CASE REPORT
While it shows the result CASE 7 as stress PASSED, as below :
CASE 7 (OCC) L7=L4+L6
Piping Code: B31.3 = B31.3 -2006, May 31, 2007
CODE STRESS CHECK PASSED : LOADCASE 7 (OCC) L7=L4+L6
Highest Stresses: (N./sq.mm. ) LOADCASE 7 (OCC) L7=L4+L6
CodeStress Ratio (%): 66.9 @Node 740
Code Stress: 89.4 Allowable: 133.7
Axial Stress: 41.2 @Node 370
Bending Stress: 111.4 @Node 799
Torsion Stress: 7.8 @Node 740
Hoop Stress: 85.1 @Node 370
3D Max Intensity: 126.9 @Node 740
3D Max Intensity: 126.9 @Node 740
Could you please explain on this ?
I have also sent you the C2 file via email.
Thank you very much