RLOAD2
Bulk Data Entry Defines a frequency-dependent dynamic load of the form for use in frequency response problems.
RLOAD2 (Form 2) can be used when the frequency-dependent dynamic load input is available in magnitude/phase number format.
Format
(1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) |
---|---|---|---|---|---|---|---|---|---|
RLOAD2 | SID | EXCITEID | DELAY | DPHASE | TB | TP | TYPE |
Example
(1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) |
---|---|---|---|---|---|---|---|---|---|
RLOAD2 | 5 | 3 | 7 |
Definitions
Field | Contents | SI Unit Example |
---|---|---|
SID | Set identification number. Must be
unique for all RLOAD1 and RLOAD2 entries. No default (Integer > 0) |
|
EXCITEID | Identification number of the
DAREA, SPCD, FORCEx,
MOMENTx, PLOADx, RFORCE,
ACCEL, ACCEL1, ACCEL2, or
GRAV entry set that defines
A. No default (Integer > 0) |
|
DELAY | Defines time delay
. If it is a non-zero integer, it represents the
identification number of a DELAY Bulk Data
Entry that defines
. If it is Real, then it directly defines the value of
that will be used for all degrees-of-freedom that are excited
by this dynamic load entry. Default = 0 (Integer ≥ 0, or Real) |
|
DPHASE | Defines phase
in degrees. If it is a non-zero integer, it represents the
identification number of a DPHASE Bulk Data
Entry that defines
. If it is Real, then it directly defines the value of
that will be used for all degrees-of-freedom that are excited
by this dynamic load entry. Default = 0 (Integer ≥ 0, or Real) |
|
TB |
No default. |
|
TP |
Default = 0 |
|
TYPE | Identifies the type of the dynamic
excitation. Default = 0 (See Comment 4) |
Comments
- Dynamic load sets must be selected in the I/O Options or Subcase Information sections with the command DLOAD=SID.
- If any DELAY, DPHASE, or TP fields are blank or zero, the corresponding , , or will be zero.
- RLOAD2 loads may be combined with RLOAD1 loads only by specification on a DLOAD entry. This means that the SID on a RLOAD2 entry must not be the same as that on a RLOAD1 entry.
- Valid
entries for the TYPE field are
listed below alongside a description of the
dynamic excitation which they invoke.
Type Description 0, L, LO, LOA, LOAD Applied load; EXCITEID references DAREA data. 1, D, DI, DIS, DISP Enforced displacement; EXCITEID references SPCD data. 2, V, VE, VEL, VELO Enforced velocity; EXCITEID references SPCD data. 3, A, AC, ACC, ACCE Enforced acceleration; EXCITEID references SPCD data. - When EXCITEID refers to an SPCD entry, the modal space will be augmented with displacement vector(s) from linear static analysis with unit prescribed displacement at each of the SPCD degrees-of-freedom.
- All static structural loads can be referenced by EXCITEID by referring to the SID on the structural load. The structural loads are FORCE, FORCE1, FORCE2, MOMENT, MOMENT1, MOMENT2, PLOAD, PLOAD1, PLOAD2, PLOAD4, RFORCE, ACCEL, ACCEL1, ACCEL2, and GRAV. EXCITEID cannot reference the LOAD and LOADADD Bulk Data Entries.
- This card is represented as a load collector in HyperMesh.