/IMPVEL/FGEO

Block Format Keyword Describes the final position of a set of N nodes. The final position is provided by a node number. The node may eventually move.

Format

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
/IMPVEL/FGEO/impvel_ID/unit_ID
impvel_title
fct_ID part_ID fct_IDL sens_ID            
Ascale T0 Tstart FscaleL Dmin
  node_ID1 node_ID'1              
  etc etc          
  node_IDN node_ID'N              

Definitions

Field Contents SI Unit Example
impvel_ID Imposed velocity block identifier

(Integer, maximum 10 digits)

  
unit_ID Unit Identifier

(Integer, maximum 10 digits)

  
impvel_title Final geometry block title.

(Character, maximum 100 characters)

  
fct_ID Time function identifier.

(Integer)

  
part_ID Spring part identifier. 5

(Integer)

  
fct_IDL Load time function identifier.

(integer)

  
sens_ID Sensor identifier.

(Integer)

  
Ascale Abscissa scale factor for fct_ID.

Default = 1.0 (Real)

 [ s ]
T0 Time duration. 3

(Real)

 [ s ]
Tstart Start time.

(Real)

 [ s ]
FscaleL Ordinate scale factor for fct_IDL.

Default = 1.0 (Real)

 [ N ]
Dmin Distance between node_IDN and node_ID'N, which will be rigidly connected.

(Real)

 [ m ]
node_ID1 Node identifier

(Integer)

  
node_ID'N Node identifier giving the final position of node_IDN.

(Integer)

  

Comments

  1. A velocity is imposed to node_IDN in the direction of node_ID'N. The initial position of node_IDN and node_ID'N are provided in /NODE.
  2. fct_ID defines the time evolution of the imposed velocity.
  3. T0 is the duration used to compute a scale factor on the velocity of node_IDN. With d 0 MathType@MTEF@5@5@+= feaagKart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaaeaaaaaaaaa8 qacaWGKbWdamaaBaaaleaapeGaaGimaaWdaeqaaaaa@3814@ being the initial distance between node_IDN and node_ID'N:(1)
    V ( t ) = f T ( t ) ⋅ d 0 T 0 MathType@MTEF@5@5@+= feaagKart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaaeaaaaaaaaa8 qaciGGwbGaciikaiaadshacaGGPaGaeyypa0JaciOzamaaBaaaleaa caWGubaabeaakiaacIcacaWG0bGaaiykaiabgwSixpaalaaapaqaa8 qacaWGKbWdamaaBaaaleaapeGaaGimaaWdaeqaaaGcbaWdbiaadsfa paWaaSbaaSqaa8qacaaIWaaapaqabaaaaaaa@4517@

    Where f T MathType@MTEF@5@5@+= feaagKart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaaeaaaaaaaaa8 qaciGGMbWaaSbaaSqaaiaadsfaaeqaaaaa@3808@ is the function of fct_IDT.

  4. Abscissa scale factor, Ascale is used to transform the function of time, as:(2)
    F ( t ' ) = f T ( t A s c a l e ) MathType@MTEF@5@5@+= feaagKart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaaeaaaaaaaaa8 qacaWGgbWaaeWaa8aabaWdbiaadshapaWaaWbaaSqabeaapeGaai4j aaaaaOGaayjkaiaawMcaaiabg2da9iGacAgadaWgaaWcbaGaamivaa qabaGcdaqadaWdaeaapeWaaSaaa8aabaWdbiaadshaa8aabaWdbiaa dgeacaWGZbGaam4yaiaadggacaWGSbGaamyzaaaaaiaawIcacaGLPa aaaaa@45DB@
  5. Initial node position node_IDN and final node position node_ID'N can be defined as a spring (node_IDN, node_ID'N) with zero stiffness. The spring part_ID is optional and can be used to simplify the input since a pre-processor can easily generate springs between an initial position and a final one.
  6. fct_IDL defines the time evolution of an optional concentrated load applied on all destination nodes node_ID'N.