Code_Aster ®
Version
4.0
Titrate:
SZLZ103 Method RAINFLOW
Date:
19/01/98
Author (S):
A. Mr. DONORE
Key:
V9.01.103-A Page:
1/6
Organization (S): EDF/IMA/MN
Handbook of Validation
V9.01 booklet: Tire
Document: V9.01.103
SZLZ103 - Method RAINFLOW
Summary:
The purpose of this test is to test the method of counting of cycles RAINFLOW starting from a history of
loading in constraints.
The functionality of filtering of the history of loading, and the taking into account of a coefficient are also tested
of stress concentration KT.
This example is a test of validation of software POSTDAM developed by Département REME, provided in
Manuel de Validation of version 1.0 of this software.
The results provided by operator POST_FATIGUE [U4.67.01] are completely identical to those provided by
software POSTDAM.
Handbook of Validation
V9.01 booklet: Tire
HI-75/96/038 - Ind A
Code_Aster ®
Version
4.0
Titrate:
SZLZ103 Method RAINFLOW
Date:
19/01/98
Author (S):
A. Mr. DONORE
Key:
V9.01.103-A Page:
2/6
1
Problem of reference
1.1 Geometry
The analysis consists in extracting the elementary cycles by the method of counting of cycles of
RAINFLOW [R7.04.01].
One filters initially the history of loading in constraints with a level of filter of 0.9.
Then one applies a coefficient of stress concentration KT = 1.
History of the loading
T
0.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
1 (T)
4.
7.
2.
10.
9.6
9.8
5.
9.
3.
4.
2.
2.4
2.2
12.
14.
15.
16.
17.
18.
19.
20.
21.
22.
23.
24.
25.
26.
27.
28.
5.
11.
1.
4.
3.
10.
6.
8.
12.
4.
8.
1.
9.
4.
6.
Handbook of Validation
V9.01 booklet: Tire
HI-75/96/038 - Ind A
Code_Aster ®
Version
4.0
Titrate:
SZLZ103 Method RAINFLOW
Date:
19/01/98
Author (S):
A. Mr. DONORE
Key:
V9.01.103-A Page:
3/6
2
Reference solution
2.1
Method of calculation used for the reference solution
This test results from the handbook of validation of software POSTDAM version 1.0. Reference solutions
are given in this document.
2.2
Results of reference
The counting of the elementary cycles by method RAINFLOW leads to:
Nb_Cycl = 12
Cycle 1
Vale_Min:
5.
Vale_Max:
11.
Cycle 2
Vale_Min:
3.
Vale_Max:
4.
Cycle 3
Vale_Min:
6.
Vale_Max:
10.
Cycle 4
Vale_Min:
1.
Vale_Max:
12.
Cycle 5
Vale_Min:
4.
Vale_Max:
8.
Cycle 6
Vale_Min:
4.
Vale_Max:
6.
Cycle 7
Vale_Min:
4.
Vale_Max:
7.
Cycle 8
Vale_Min:
2.
Vale_Max:
9.
Cycle 9
Vale_Min:
5.
Vale_Max:
9.
Cycle 10
Vale_Min:
3.
Vale_Max:
4.
Cycle 11
Vale_Min:
2.
Vale_Max:
10.
Cycle 12
Vale_Min:
1.
Vale_Max:
12.
2.3
Uncertainty on the solution
Analytical solution.
2.4 References
bibliographical
[1]
Handbook of validation POSTDAM 1.0. Baker I., Vatin E. HP-14/93/016/B.
Handbook of Validation
V9.01 booklet: Tire
HI-75/96/038 - Ind A
Code_Aster ®
Version
4.0
Titrate:
SZLZ103 Method RAINFLOW
Date:
19/01/98
Author (S):
A. Mr. DONORE
Key:
V9.01.103-A Page:
4/6
3 Modeling
With
3.1 Functionalities
tested
Order
POST_FATIGUE [U4.67.01].
Key word
Operands
HISTOIRE
SIGM:
COMPTAGE:
“RAINFLOW”
DELTA_OSCI:
COEF_MULT
KT:
INFO:
1
Handbook of Validation
V9.01 booklet: Tire
HI-75/96/038 - Ind A
Code_Aster ®
Version
4.0
Titrate:
SZLZ103 Method RAINFLOW
Date:
19/01/98
Author (S):
A. Mr. DONORE
Key:
V9.01.103-A Page:
5/6
4
Results of modeling A
4.1 Values
tested
Identification
Reference
Aster
% difference
NB_CYCL
12.
12.
0.
Cycle 1 VALE_MIN
5.
5.
0
VALE_MAX
11.
11.
0.
Cycle 2 VALE_MIN
3.
3.
0.
VALE_MAX
4.
4.
0.
Cycle 3 VALE_MIN
6.
6.
0.
VALE_MAX
10.
10.
0.
Cycle 4 VALE_MIN
1.
1.
0.
VALE_MAX
12.
12.
0
Cycle 5 VALE_MIN
4.
4.
0.
VALE_MAX
8.
8.
0
Cycle 6 VALE_MIN
4.
4.
0.
VALE_MAX
6.
6.
0.
Cycle 7 VALE_MIN
4.
4.
0.
VALE_MAX
7.
7.
0.
Cycle 8 VALE_MIN
2.
2.
0.
VALE_MAX
9.
9.
0.
Cycle 9 VALE_MIN
5.
5.
0
VALE_MAX
9.
9.
0.
Cycle 10 VALE_MIN
3.
3.
0.
VALE_MAX
4.
4.
0.
Cycle 11 VALE_MIN
2.
2.
0.
VALE_MAX
10.
10.
0.
Cycle 12 VALE_MIN
1.
1.
0.
VALE_MAX
12.
12.
0.
4.2 Parameters
of execution
Version: 3.06.18
Machine: CRAY C90
Obstruction memory:
8 MW
Time CPU To use:
1.7426 seconds
Handbook of Validation
V9.01 booklet: Tire
HI-75/96/038 - Ind A
Code_Aster ®
Version
4.0
Titrate:
SZLZ103 Method RAINFLOW
Date:
19/01/98
Author (S):
A. Mr. DONORE
Key:
V9.01.103-A Page:
6/6
5
Summary of the results
The Aster results are perfectly identical to the values of reference provided in Manuel of
Validation of version 1.0 of software POSTDAM.
Handbook of Validation
V9.01 booklet: Tire
HI-75/96/038 - Ind A