TRIMF

I/O Options and Subcase Information Entry Used to specify options for the output of trim loads from a static aeroelastic analysis as FORCE/MOMENT Bulk Data Entries.

Format

TRIMF (LOADSET=n, LARGE, INERTIA, APPLIED, AIR, NOSUM, RIGID, NOELASTIC, QNORM) = option

Definitions

Argument Description
LOADSET Load SET ID for output Bulk Data eEtries. If the TRIMF specification results in multiple load sets, then the defined ID will be used for the first and each subsequent load set has an ID incremented by 1.

Default = 1 (Integer)

LARGE Write the output data in large field format (16 characters per field).

The default is 8 characters per field.

INERTIA Write out inertial loads as a separate load set.

By default, the separate load set will not be written.

APPLIED Write out applied loads as a separate load set.

By default, the separate load set will not be written.

AIR Write out aerodynamic loads as a separate load set.

By default, the separate load set will not be written.

NOSUM Suppresses the writing of that set of loads.

By default, the sum of the inertial, applied, and aerodynamic loads will be written as a separate load set.

RIGID Write out rigid instances of the selected loads (Inertial, Applied, Air and/or Sum) as separate load sets.

By default, the separate load set will not be written.

NOELASTIC Suppresses the writing of that set of loads.

By default, the sum of the rigid and elastic increment loads will be written as a separate load set.

QNORM Normalize the load by the dynamic pressure used in the trim analysis.

By default, the loads are not normalized.

option
ALL
Loads for all points will be output.
SID
Set identification number.
Only loads on points with identification numbers which appear on the specified SET will be output.

(Integer > 0)

1. The loads are written to the .trim ASCII file.
2. Up to eight loads sets are available: Rigid Inertial, Rigid Applied, Rigid Air, Rigid Sum and four more with the sum of the rigid and elastic increment. This table indicates how the describers invoke each of these sets.
INERTIA APPLIED AIR SUM
RIGID O O O O
ELASTIC O O O Default
3. Care must be taken if LOADSET is specified in a run with multiple subcases. There are no checks that the load set IDs which are generated by one subcase are not also used for another subcase. For example, consider the following Case Control commands:
SUBCASE 101
TRIM = 101
TRIMF(RIGID) = ALL \$
SUBCASE 201
TRIM = 201
TRIMF(LOADSET=3) = ALL

Subcase 1 will generate two load sets with set IDs 1 and 2. Subcase 2 can then have TRIMF with LOADSET=3 so that the load set IDs for subcase 2 will start at 3.

4. The LOADSET option should not be specified above the subcase level when there are multiple subcases. If it is, each subcase will start numbering its load ID’s from LOADSET.