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*SLOAD

Data format:

An arbitrary number of lines comprising 6 values each

IP IDIR AMPFOR PERFOR PHIFOR IREF

Status:

Optional

Purpose:

To define concentrated loads : $$ F = AMP_{for} \cos(\frac{2\pi}{PER_{for}}t + PHI_{for}) $$

Restriction:

The node IP must have been previously defined (keyword *NODES)

Detail:

Parameter	Description
IP	Identification number of the node where the
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 \(\vec{u}_3\)
AMPFOR	Amplitude of the load (force or moment)
PERFOR	Period of the load
PHIFOR	Phase angle of the load with respect to the wave (degrees)
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

During the first period this expression is multiplied by a factor t/RAMP in order to provide a progressive application of the prescribed sinusoidal load. RAMP is Max(RAMPTIME,PERFOR) (see keyword *RAMPTIME)

Example:

*SLOAD
1 2 10000. 16. 0.

Node 1 is loaded in the Y-direction by a force of 10000. N with a period of 16 seconds. The loading is in phase with respect to the wave.