3. Operands#

3.1. Operand RESU_GENE#

♦ RESU_GENE = TG

Result of a transient calculation by modal recombination, produced by the operator DYNA_TRAN_MODAL [U4.53.21].

3.2. Keyword CHOC#

◊ CHOC

Keyword factor to specify that we want an analysis of the shock nonlinearities taken into account in the modal transient calculation.

3.2.1. Operand INST_INIT#

◊ INST_INIT = t0

Time of start of signal averaging and shock analysis. By default t0 corresponds to the first instant of the transient calculation by modal recombination.

3.2.2. Operand INST_FIN#

◊ INST_FIN = t1

Time of end of signal averaging and shock analysis.

(t1=999. value by default),

3.2.3. Operand NB_BLOC#

◊ NB_BLOC = nb

Number of time blocks for dividing the interval [t0, t1] for the averaging of signals (1 by default).

The keyword is not used for the “IMPACT” option.

3.2.4. Operand SEUIL_FORCE#

◊ SEUIL_FORCE = s

Threshold characterizing a contact phase, (\(\mid {f}_{n}\mid >s\Rightarrow \text{contact établi}\))

(s = 0. value by default).

3.2.5. Operand DUREE_REPOS#

   ◊ DUREE_REPOS = d

*With d* the minimum length of rest characterizing the end of a shock.

        If we designate by tc the end of the shock then

\(\forall t\in \left[{t}_{c},{t}_{c}+d\right]\to \mid {f}_{n}\mid <s\)

The rest period d is the minimum amount of time during which no contact on the node is recorded, in order to determine the end of a shock event and its duration.

3.2.6. Operand OPTION#

◊ OPTION =/'USURE'

/”IMPACT”

This keyword makes it possible to choose between post-treatment in order to diagnose wear (keyword “USURE”) or to better understand the possible shocks that occurred during the transitory analysis (keyword “IMPACT”). This last post-processing is adapted to the calculation of the internals of power plants REP see [§4].

3.2.7. Operand NB_CLASSE#

◊ NB_CLASSE = nc

Number of classes that the user wants to distinguish when developing the histogram describing the maxima of impact forces. By default, nc = 10.

3.3. Keyword RELA_EFFO_DEPL#

◊ RELA_EFFO_DEPL

Keyword factor allowing an analysis of stress-displacement nonlinearity relationships.

The name of the relationship to the observed node, the analysis times and the maximum reached by the component observed during the analysis are archived in the result table.

All the phases with non-linear behavior are determined and archived in the result table for each:

the initial instant and the final instant of the interval of the non-linear phase,
the maximum reached and the associated time in this interval.

The parameters of the table produced are described in the following table:

PARAMETRES	TYPE	DESCRIPTION
RELATION	K8	relationship name to the observed node
NOEUD	K8	name of the processed node
GROUP_NO	K8	Name of the node group containing the node to be processed
CMP	K8	component name
PHASE	I	phase number
INST_INIT	R	initial instant of the nonlinear phase interval
INST_FIN	R	final instant of the nonlinear phase interval
MAXI	R	maximum reached
INST_MAXI	R	instant associated with the maximum reached

3.3.1. Operand GROUP _ NO#

Name of the node group containing the structure node on which the nonlinear relationship to be processed has been defined.

3.3.2. Operand NOM_CMP#

♦ NOM_CMP = noncmp

The name of the component processed at the node node.

3.4. Operand INFO#

◊ INFO = imp, impression level

/1no impression on the message file (everything is stored in the produced table)

/2Impression of the number of calculation time steps

3.5. Operand TITRE#

◊ TITRE = title

title is the title of the calculation. It will be printed at the top of the results. It is stored in the concept table.