6. Operands CHAM_GD and RESULTAT#

Calculated field values are stored in data structures called quantity fields. These quantity fields can be directly accessible (concept cham_gd) or can be found in a data structure combining several quantity fields (concept result).

a size field is a data structure that allows you to store fields defined at the nodes (cham_no_) or fields defined by elements (cham_elem_*). For fields by elements, we distinguish between fields defined at the nodes of the elements and fields defined at the points of GAUSS of the elements,

  • a resulting concept consists of one or more quantity fields. For example, at each calculation step, the displacement quantity field is stored in the result data structure. This structure is therefore indexed by a second-order matrix structure, one index of which is, for example, the list of calculation times and the other the set of calculated fields (displacements, constraints, deformations,…).

In this case, a quantity field is accessed by specifying the value of an access variable (order number, instant, frequency, mode number…) and a field name (“DEPL”, “SIGM_ELNO”,…). There are several types of result concept: evol_elas, evol_noli, mode_meca,… Each corresponds to a list of fields and a list of legal access variables.

On the other hand, a result concept is also associated with a certain number of complementary results (for example the generalized mass or the modal participation factors in a modal calculation (result concept of the mode_meca type)), different for each value of the access variable. These additional results are called parameters.

Given the structure of the result data, it is easy to understand that the printing possibilities that are available are those of the size fields, complemented by specific possibilities:

  • information on the data structure (for example: list of access variables, list of fields actually calculated, … ),

  • selective access to a quantity field (for example, printing the displacement field at time \(t\mathrm{=}15.\)),

  • printing of parameter values.

The RESULTAT operand allows you to print the fields contained in a result concept. For example, you can choose to print only certain fields (enter the following keyword: NOM_CHAM) on certain components of certain nodes (see NOEUD_CMP).