1. Purpose and description#
The objective of this macro-command is to perform post-processing of linear elastic calculations, taking into account the elasto-plastic behavior of pipe lines under earthquake and permanent loads, according to the simplified Roche method.
It takes moment values (MT components, MFY and MFZ) as input from calculations corresponding to various types of loading (inertial earthquake, self-weight,…) on pipe lines (elements POU_D_T only). These moments are provided either in the form of fields to the nodes per element (ELNO) or as results containing the EFGE_ELNO field.
This macro command treats cases where:
all loads are time-independent (keyword factor RESU_MECA)
a loading (inertial seismic loading) is time-dependent (keyword factor RESU_MECA_TRAN)
In the first case, the output concept is a field with nodes by elements of quantity NEUT_R.
The first 16 components Xi of this quantity correspond to the following characteristics:
X1 |
Reference constraint due to travel |
X2 |
Reference stress due to inertial earthquake |
X3 |
Local reversibility due to travel |
X4 |
Local reversibility due to inertial earthquake |
X5 |
Total reversibility due to travel |
X6 |
Total reversibility due to inertial earthquake |
X7 |
Monotone spring effect factor |
X8 |
Seismic spring effect factor |
X9 |
Maximum monotonic spring effect factor |
X10 |
Maximum Seismic Spring Effect Factor |
X11 |
Monotonous reduction coefficient |
X12 |
Seismic reduction coefficient |
X13 |
Optimized monotonic reduction coefficient |
X14 |
Optimized seismic reduction coefficient |
X15 |
Equivalent stress |
X16 |
Optimized equivalent stress |
The following 4 are added to perform verifications. These 4 components are equal to 0 or 1. The value 1 means that during the calculation, a value for the true stress was obtained that was less than the pressure stress. In this case, this induces a reduction coefficient of 1.
X17 |
Monotonous true constraint criterion |
X18 |
True seismic stress criterion |
X19 |
Optimized monotonic true constraint criterion |
X20 |
Optimized true seismic stress criterion |
Finally, 8 other components give the values of the true stresses and true deformations calculated.
X21 |
Monotonous true constraint |
X22 |
True seismic stress |
X23 |
Optimized monotonous true constraint |
X24 |
Optimized true seismic stress |
X25 |
True monotonic deformation |
X26 |
True seismic deformation |
X27 |
Optimized true monotone deformation |
X28 |
Optimized true seismic deformation |
It is specified that in the case where RCCM_RX =” OUI “, the components X11, X12, X12, X15, X17, X18, X21, X22, X25 and X26 are not used and are left at 0.
In the second case, the output concept is a result comprising, for each requested calculation moment, a field with nodes by elements of magnitude NEUT_R as described for the first case. These fields are listed by the field name UT01_ELNO.
This concept also contains another field of the same type corresponding to each node of each element and for each component to the maximum of the values reached at all times. This field is listed by the field name UT02_ELNO and the time 0.
The fields and calculated results are printed into the « result » file using the IMPR_RESU [U4.91.01] or POST_RELEVE_T [U4.81.21] commands (by specifying the appropriate order numbers in the case of result concepts).