/ACTIV

Block Format Keyword Describes the deactivation/activation of element groups.

Format

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
/ACTIV/activ_ID/unit_ID
activ_title
sens_ID grbric_ID grquad_ID grshel_ID grtrus_ID grbeam_ID grspr_ID grsh3n_ID   Iform
Insert if Iform=2
(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
Tstart Tstop            

Definitions

Field Contents SI Unit Example
activ_ID Element deactivation block identifier.

(Integer, maximum 10 digits)

  
unit_ID (Optional) Unit Identifier

(Integer, maximum 10 digits)

  
activ_title Element deactivation block title.

(Character maximum 100 characters)

  
sens_ID Sensor identifier.

(Integer)

  
grbric_ID Brick element group identifier.

(Integer)

  
grquad_ID Quad element group identifier.

(Integer)

  
grshel_ID Shell element group identifier.

(Integer)

  
grtrus_ID Truss element group identifier.

(Integer)

  
grbeam_ID Beam element group identifier.

(Integer)

  
grspr_ID Spring element group identifier.

(Integer)

  
grsh3n_ID 3N shell element group identifier.

(Integer)

  
Iform Formulation flag.
=1 (Default)
Elements are deactivated when the sensor is activated (ON).
=2
Elements are activated when T > T s t a r t or if sens_ID is defined T > T s t a r t + T s e n s o r .
Elements are deactivated when T > T s t o p MathType@MTEF@5@5@+= feaagKart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamivaiabg6 da+iaadsfadaWgaaWcbaGaam4CaiaadshacaWGVbGaamiCaaqabaaa aa@3CB7@ or if sens_ID is defined T > T s t o p + T s e n s o r MathType@MTEF@5@5@+= feaagKart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamivaiabg6 da+iaadsfadaWgaaWcbaGaam4CaiaadshacaWGVbGaamiCaaqabaGc cqGHRaWkcaWGubWaaSbaaSqaaiaadohacaWGLbGaamOBaiaadohaca WGVbGaamOCaaqabaaaaa@4460@ .

(Integer)

 
Tstart Activation time for Iform=2.

(Real)

 [ s ]
Tstop Deactivation time for Iform=2.

Default = 1.0E+30 (Real)

 [ s ]

Comments

  1. Iform= 1: all elements belonging to specified groups are deactivated when the sensor is activated (ON). These elements are not deleted.

    They may be reactivated when the sensor is deactivated - see /SENSOR criteria.

    Iform=2:

    All elements belonging to specified groups are activated when:
    • T > T s t a r t
    • or T > T s t a r t + T s e n s o r if a sensor is given
    ll elements belonging to specified groups are deactivated when:
    • T > T s t o p
    • or T > T s t o p + T s e n s o r if a sensor is given

    Where, T s e n s o r is the sensor activation time.

  2. Deactivated elements must not belong to any rigid bodies.