*PLOAD

Data format:

An arbitrary number of lines comprising 7 values each

IP IDIR FORCE ITABLE TECH INTER IREF

Status :

Optional

Purpose :

To define constant or variable concentrated loads

Restriction :

The node IP , and the table ITABLE must have been previously defined ( keywords NODES and TABLE )

Details :

Parameter	Description
IP	Identification number of the node where FORCE is to be applied
IDIR	Index for the direction of the applied force In the co-ordinate system IREF \((\vec{u}_1, \vec{u}_2, \vec{u}_3)\) : 1 - force 4 - moment along \(\vec{u}_1\) 2 - force 5 - moment along \(\vec{u}_2\) 3 - force 6 - moment along \(\vec{u}_3\)
FORCE	Amplitude of the load (force or moment)
ITABLE	Reference table for the possible time description of the load (see note). If the load is constant set ITABLE=0 and ignore the 2 following values.
TECH	Time step of the description table (see note).
INTER	=0 step function. The value of the force is constant between (I-1)TECH and ITECH . = 1 there will be linear interpolation between 2 successive values in the table .
IREF	Reference number of the co-ordinate system \((\vec{u}_1, \vec{u}_2, \vec{u}_3)\) defined with BCREFGLO or BCREFLOC ( default = 0 : global co-ordinate system \((\vec{e}_1, \vec{e}_2, \vec{e}_3)\) )

Note

Those forces are defined in global axis . They are of conservative type .
At time T ( (I-1)TECH < T < ITECH ) the force applied to node IP is computed as follows ( I > or = to 1 ) :

If INTER=0 , F = FORCE*TABLE(I,ITABLE)

If INTER=1 , F will be interpolated between the values with index I and I+1 in the table ITABLE .

Examples : *PLOAD
c[.] [.] [N]
11 3 -21.8e3
This corresponds to an added weight to node 11

*PLOAD
11 3 21.8e3
This corresponds to a buoy.