Block Format Keyword Defines pressure load on a surface.

## Format

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
surf_ID fct_IDT sens_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)

surf_ID Surface identifier.

(Integer)

fct_IDT Time function identifier.

(Integer)

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

(Integer)

Ascalex Abscissa (time) scale factor.

Default = 1.0 (Real)

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

Default = 1.0 (Real)

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

1. In 3D analysis, positive pressure acts in direction $n={N}_{1}{N}_{3}×{N}_{2}{N}_{4}$ with N1, N2, N3, and N4 being the nodes of the segment in the surface definition.
2. In 2D analysis, positive pressure acts in direction $\stackrel{\to }{n}$ normal to N1 and N2, obtained by a rotation in the counterclockwise direction.
$\mathrm{F}\left(t\right)=Fscal{e}_{y}\cdot {\mathrm{f}}_{T}\cdot \left(\frac{t}{Ascal{e}_{x}}\right)$
Where, ${\mathrm{f}}_{T}$ is the function of fct_IDT.