/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

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_ID`_L	Load time function identifier. (integer)
`sens_ID`	Sensor identifier. (Integer)
`Ascale`	Abscissa scale factor for `fct_ID`. Default = 1.0 (Real)	$[s]$ $[s]$
`T`₀	Time duration. 3 (Real)	$[s]$ $[s]$
`T`_start	Start time. (Real)	$[s]$ $[s]$
`Fscale`_L	Ordinate scale factor for `fct_ID`_L. Default = 1.0 (Real)	$[N]$ $[N]$
`Dmin`	Distance between `node_ID`_N and `node_ID'`_N, which will be rigidly connected. (Real)	$[m]$ $[m]$
`node_ID`₁	Node identifier (Integer)
`node_ID'`_N	Node identifier giving the final position of `node_ID`_N. (Integer)

A velocity is imposed to node_ID_N in the direction of node_ID'_N. The initial position of node_ID_N and node_ID'_N are provided in /NODE.
fct_ID defines the time evolution of the imposed velocity.
T₀ is the duration used to compute a scale factor on the velocity of node_ID_N. With $d_{0}$ $d_{0}$ being the initial distance between node_ID_N and node_ID'_N:(1)
$V (t) = f_{T} (t) \cdot \frac{d_{0}}{T_{0}}$ $V (t) = f_{T} (t) \cdot \frac{d_{0}}{T_{0}}$

Where $f_{T}$ $f_{T}$ is the function of fct_ID_T.
Abscissa scale factor, Ascale is used to transform the function of time, as:(2)
$F (t^{'}) = f_{T} (\frac{t}{A s c a l e})$
Initial node position node_ID_N and final node position node_ID'_N can be defined as a spring (node_ID_N, 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.
fct_ID_L defines the time evolution of an optional concentrated load applied on all destination nodes node_ID'_N.