Aeroelastic coupling¶
Commands of the aeroelastic_coupling chapter of the database, 10 entries. The status words are defined once, on the compatibility matrix, which says what each rests on and what the script builder does with it. Read it before this page: broken and removed are refusals, so a row here can be telling you the emitter will not write that command for that version.
ASSIGN_AEROELASTIC_COORDINATE_SYSTEMS¶
Phase init, layout payload_lines. Manual: SRC-003 p.375.
Links user-defined coordinate systems for the aeroelastic interpolation, one index per line after the count. THE PAGE FORBIDS A VALUE OF 1 AND DOES NOT SAY WHICH VALUE. The parameter table has a single row, NUM_INDEX, which is the count; the index lines have no row of their own. On that row the manual says setting the value to 1, glossed as the reference, throws an error. So the sentence sits on the COUNT and its gloss describes an INDEX, and the two readings differ: a count of exactly one coordinate system refused, or the reference frame refused among the indices. The sample settles nothing, passing a count of 3 and the indices 2, 3 and 4, which satisfies both. The three editions that carry this chapter word it identically (SRC-725 p.374, SRC-003 p.375, SRC-740 p.378); the February 2026 edition has no Aeroelastic Coupling Toolbox at all, its scripting reference ending at the Acoustics Toolbox (SRC-741 p.369), so no edition disagrees and none settles it. Nothing is enforced here for that reason. This entry previously asserted the index reading as fact, which was an interpretation presented as a citation; PLN-20260808-1100 carries the probe.
| Argument | Specification |
|---|---|
num_index |
int |
frame_indices |
int_list (optional) |
| Version | Status | Evidence |
|---|---|---|
| 26.101 | documented | SRC-725 p.374, same grammar as 26.120 |
| 26.120 | documented | SRC-003 p.375 |
| 26.121 | documented | SRC-740 p.378, same grammar as 26.120 |
| 26.123 | documented | SRC-751 p.382, unchanged from SRC-750 p.382 |
| 26.124 | documented | SRC-752 p.382, the SRC-751 file, carried from 26.123; not run on 26.124 |
ASSIGN_AEROELASTIC_SURFACES¶
Phase init, layout payload_lines. Manual: SRC-003 p.375.
Mesh boundaries whose deflections the toolbox interpolates; one index per line after the count, -1 selects all boundaries with no index lines.
| Argument | Specification |
|---|---|
num_boundaries |
int |
boundary_indices |
int_list (optional) |
| Version | Status | Evidence |
|---|---|---|
| 26.101 | documented | SRC-725 p.374, same grammar as 26.120 |
| 26.120 | documented | SRC-003 p.375 |
| 26.121 | documented | SRC-740 p.378, same grammar as 26.120 |
| 26.123 | documented | SRC-751 p.382, unchanged from SRC-750 p.382 |
| 26.124 | documented | SRC-752 p.382, the SRC-751 file, carried from 26.123; not run on 26.124 |
DELETE_AEROELASTIC_STRUCTURAL_NODES¶
Phase init, layout bare. Manual: SRC-003 p.375.
Deletes all imported structural nodes.
| Version | Status | Evidence |
|---|---|---|
| 26.101 | documented | SRC-725 p.374, same grammar as 26.120 |
| 26.120 | documented | SRC-003 p.375 |
| 26.121 | documented | SRC-740 p.378, same grammar as 26.120 |
| 26.123 | documented | SRC-751 p.382, unchanged from SRC-750 p.382 |
| 26.124 | documented | SRC-752 p.382, the SRC-751 file, carried from 26.123; not run on 26.124 |
EXECUTE_AEROELASTIC_ANALYSIS¶
Phase exec, layout bare. Manual: SRC-003 p.375.
Runs the steady-state aeroelastic analysis. For unsteady coupling the manual instructs the regular solver execution with SET_AEROELASTIC_COUPLING_IN_UNSTEADY enabled instead (SRC-003 p.275).
| Version | Status | Evidence |
|---|---|---|
| 26.101 | documented | SRC-725 p.374, same grammar as 26.120 |
| 26.120 | documented | SRC-003 p.375 |
| 26.121 | documented | SRC-740 p.378, same grammar as 26.120 |
| 26.123 | documented | SRC-751 p.382, unchanged from SRC-750 p.382 |
| 26.124 | documented | SRC-752 p.382, the SRC-751 file, carried from 26.123; not run on 26.124 |
IMPORT_AEROELASTIC_STRUCTURAL_NODES¶
Phase init, layout inline. Manual: SRC-003 p.375.
Imports the structural node list; the file is three comma separated columns X,Y,Z per node (SRC-003 p.274), interpreted in the given coordinate system. The node order fixes the FSIDisp.txt displacement order.
| Argument | Specification |
|---|---|
structural_coordinate_system |
int |
delete_existing |
enum in |
nodes_path |
path |
| Version | Status | Evidence |
|---|---|---|
| 26.101 | documented | SRC-725 p.374, same grammar as 26.120 |
| 26.120 | documented | SRC-003 p.375 |
| 26.121 | documented | SRC-740 p.378, same grammar as 26.120 |
| 26.123 | documented | SRC-751 p.382, unchanged from SRC-750 p.382 |
| 26.124 | documented | SRC-752 p.382, the SRC-751 file, carried from 26.123; not run on 26.124 |
SET_AEROELASTIC_COUPLING_IN_UNSTEADY¶
Phase init, layout inline. Manual: SRC-003 p.376.
Toggles the FSI execution inside the unsteady solver; with ENABLE the coupling runs on the regular solver start.
| Argument | Specification |
|---|---|
state |
enum in |
| Version | Status | Evidence |
|---|---|---|
| 26.101 | documented | SRC-725 p.375, same grammar as 26.120 |
| 26.120 | documented | SRC-003 p.376 |
| 26.121 | documented | SRC-740 p.379, same grammar as 26.120 |
| 26.123 | documented | SRC-751 p.383, unchanged from SRC-750 p.383 |
| 26.124 | documented | SRC-752 p.383, the SRC-751 file, carried from 26.123; not run on 26.124 |
SET_AEROELASTIC_ITERATIONS¶
Phase init, layout inline. Manual: SRC-003 p.376.
Two-way coupling iterations: the total count in steady mode, the count per time step in unsteady mode (SRC-003 p.275).
| Argument | Specification |
|---|---|
num_iterations |
int |
| Version | Status | Evidence |
|---|---|---|
| 26.101 | documented | SRC-725 p.375, same grammar as 26.120 |
| 26.120 | documented | SRC-003 p.376 |
| 26.121 | documented | SRC-740 p.379, same grammar as 26.120 |
| 26.123 | documented | SRC-751 p.383, unchanged from SRC-750 p.383 |
| 26.124 | documented | SRC-752 p.383, the SRC-751 file, carried from 26.123; not run on 26.124 |
SET_AEROELASTIC_POST_PROCESSING_SCRIPT¶
Phase init, layout inline. Manual: SRC-003 p.376.
FlightStream script executed between FSI iterations, before the external executable; the documented mechanism for exporting the aerodynamic forces the executable consumes (SRC-003 p.275), for example the surface section loads export.
| Argument | Specification |
|---|---|
script_path |
path |
| Version | Status | Evidence |
|---|---|---|
| 26.101 | documented | SRC-725 p.375, same grammar as 26.120 |
| 26.120 | documented | SRC-003 p.376 |
| 26.121 | documented | SRC-740 p.379, same grammar as 26.120 |
| 26.123 | documented | SRC-751 p.383, unchanged from SRC-750 p.383 |
| 26.124 | documented | SRC-752 p.383, the SRC-751 file, carried from 26.123; not run on 26.124 |
SET_AEROELASTIC_STRUCTURAL_EXECUTION_COMMAND¶
Phase init, layout inline. Manual: SRC-003 p.376.
Full command executed per coupling iteration in the working directory. The dry run observed a bare invocation: no arguments are appended by the solver.
| Argument | Specification |
|---|---|
command |
str |
| Version | Status | Evidence |
|---|---|---|
| 26.101 | documented | SRC-725 p.375, same grammar as 26.120 |
| 26.120 | documented | SRC-003 p.376 |
| 26.121 | documented | SRC-740 p.379, same grammar as 26.120 |
| 26.123 | documented | SRC-751 p.383, unchanged from SRC-750 p.383 |
| 26.124 | documented | SRC-752 p.383, the SRC-751 file, carried from 26.123; not run on 26.124 |
SET_AEROELASTIC_WORKING_DIRECTORY¶
Phase init, layout inline. Manual: SRC-003 p.375.
Runtime folder of the coupling: FlightStream writes FSIDisp.txt and the loads exports there and executes the runtime command there (SRC-003 pp.274-275). The dry run confirmed it is the working directory of the external executable's process.
| Argument | Specification |
|---|---|
directory_path |
path |
| Version | Status | Evidence |
|---|---|---|
| 26.101 | documented | SRC-725 p.374, same grammar as 26.120 |
| 26.120 | documented | SRC-003 p.375 |
| 26.121 | documented | SRC-740 p.378, same grammar as 26.120 |
| 26.123 | documented | SRC-751 p.382, unchanged from SRC-750 p.382 |
| 26.124 | documented | SRC-752 p.382, the SRC-751 file, carried from 26.123; not run on 26.124 |