Block Format Keyword Defines a concentrated force or moment applied to each node of a prescribed nodal group.

## Format

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
fct_IDT Dir skew_ID sens_ID grnd_ID   Ascalex Fscaley

## Definitions

Field Contents SI Unit Example

(Integer, maximum 10 digits)

unit_ID Unit Identifier

(Integer, maximum 10 digits)

(Character, maximum 100 characters)

fct_IDT Time function identifier.

(Integer)

Dir Direction of load: X, Y, and Z for forces; XX, YY, and ZZ for moments.

(Text)

skew_ID Skew identifier.

(Integer)

sens_ID Sensor identifier.
0
The concentrated load is applied after sensor activation (the time function is shifted in time).

(Integer)

grnd_ID Node group to which the concentrated loads are applied.

(Integer)

Ascalex Abscissa scale factor.

Default = 1.0 (Real)

$\left[\text{s}\right]$
Fscaley Ordinate scale factor.

Default = 1.0 (Real)

$\left[\text{N}\right]$

1. The direction of load must be right justified in the ten characters of field number 2.
2. The grnd_ID input is obligatory. The concentrated loads will only be applied to the nodal group. The force is applied to each node individually, so:(1)
$total_force=\mathrm{F}\left(t\right)\cdot {N}_{node}$

with ${N}_{node}$ being the number of nodes in the node group.

3. The Ascalex and Fscaley are used to scale the abscissa and ordinate.
The actual load function value is calculated as following:(2)
$\mathrm{F}\left(t\right)=Fscal{e}_{y}\cdot {\mathrm{f}}_{T}\cdot \left(\frac{t}{Ascal{e}_{x}}\right)$

Where, ${\mathrm{f}}_{T}$ is the function of fct_IDT.

The force is applied individually to each node of the nodal group. The total force is equivalent to the force value multiplied by the number of nodes.