/LOAD/CENTRI
Block Format Keyword Apply a centrifugal force on a set of nodes according a body rotational velocity around the defined direction.
Format
(1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) |
---|---|---|---|---|---|---|---|---|---|
/LOAD/CENTRI/load_ID/unit_ID | |||||||||
load_title | |||||||||
fct_IDT | Dir | frame_ID | sens_ID | grnod_ID | Ivar | Ascalex | Fscaley |
Definitions
Field | Contents | SI Unit Example |
---|---|---|
load_ID | Load
identifier (Integer, maximum 10 digits) |
|
unit_ID | Unit Identifier (Integer, maximum 10 digits) |
|
load_title | Load title (Character, maximum 100 characters) |
|
fct_IDT | Time function identifier,
giving the rotational velocity
versus time. (Integer) |
|
Dir | Direction of rotation
(input XX, YY or ZZ) (Text) |
|
frame_ID | Frame identifier
(Integer) |
|
sens_ID | Sensor
identifier. (Integer) |
|
grnod_ID | Node group to which the
load is applied. (Integer) |
|
Ivar | Flag to disregard
variation of velocity with respect to time, for the calculation of
the force.
(Integer) |
|
Ascalex | Abscissa scale
factor. Default = 1.0 (Real) |
|
Fscaley | Ordinate scale
factor. Default = 1.0 (Real) |
Comments
- A force is computed corresponding to a body rotational velocity around the direction Dir of the global reference system if frame_ID = 0, or the reference system defined by the frame if frame_ID ≠ 0.
- This option is not a kinematic condition (velocity of the nodes is not specified).
- If frame_ID =
0, the force applied to the node of mass
, at location
is computed as:
(1) If Ivar = 1:
is not taken into account.(2) - If
frame_ID ≠ 0, the force applied to a node is
computed as:
(3) Driving force:(4) Coriolis force:(5) Relative force:(6) If Ivar = 1:
is not taken into account in relative force.
(7) Where,- R
- Global reference system
- R'
- Reference system defined by the frame
- A
- Origin of the frame
- M
- A point of the defined group of node
- Rotational velocity of the frame with respect to the global reference system
- Rotational velocity defined by the time function