Block Format Keyword Defines pressure load on a surface.


(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
surf_ID fct_IDT sens_ID Ipinch Idel   Ascalex Fscaley


Field Contents SI Unit Example
pload_ID Pressure load block identifier.

(Integer, maximum 10 digits)

unit_ID Unit Identifier.

(Integer, maximum 10 digits)

pload_title Pressure load block title.

(Character, maximum 100 characters)

surf_ID Surface identifier.


fct_IDT Time function identifier.


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


Ipinch Pinching flag. 4
= 0 (Default)
Standard pressure.
= 1
Pinching pressure type.
Idel Pressure canceling flag. 4
= 1 (Default)
Pressure load is canceled when all the elements associated to the segment are deleted.
= 2
Pressure load is not canceled.


Ascalex Abscissa (time) scale factor.

Default = 1.0 (Real)

[ s ]
Fscaley Ordinate (pressure) scale factor.

Default = 1.0 (Real)

[ Pa ]


  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 n MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeaaciGaaiaabeqaamaabaabaaGcbaGaaCOBaaaa@36EB@ normal to N1 and N2, obtained by a rotation in the counterclockwise direction.
  3. The Ascalex and Fscaley are used to scale the abscissa (time) and ordinate (pressure).
    The actual pressure function value is calculated as:(1)
    F ( t ) = F s c a l e y f T ( t A s c a l e x )

    Where, f T is the function of fct_IDT.

  4. Ipinch set to 1 will apply pinching type of pressure (acts normal to the surface of the shell element). Currently only supported for QBAT (Ishell=12) type of shells.