name.iN

Program

HDYN

Format

; program control IP KMET KOUT 2*0 NINT KTPR NGD RP 3*0 PENAL TSTEP BETA ; optional first kind of initial conditions IC ISET T KQT R

$[X]_0$ ; optional second kind of initial conditions IC ISET T KQT I IREC ; optional third kind of initial conditions IC ISET T KQT R

$X_0$

$Y_0$

$Z_0$ ; optional quantity dump IN ISET T KPRIN I

$[$ IN

$]$ ; end of input data EN EN

Note
If there is no IC batch it is automatically assumed that the initial conditions are homogenous.

Annotations

$\mathtt{KMET}$	The key of the solution method.
$\mathtt{KMET}$	$=1$	central difference metod (default)
$\mathtt{KOUT}$	The key of the output to the binary file `name.PLS`.
	$=0$	only check the input data
	$=1$	after each load case
	$=2$	after each cycle
	$=3$	only the final solution
$\mathtt{NINT}$	The division of the integration step. The default value is $10.$
$\mathtt{KTPR}$	The key of test prints.
	$=0$	none
	$=1$	computation trace (recommended)
	$=2$	trace + displacement vector after each iteration
	$=3$	trace + reaction force vector
$\mathtt{NGD}$	The order of numerical integration on the element, $1\le\mathtt{NGD}\le4.$ The default value is $\mathtt{NG},$ i.e., the value assigned to the element in the mesh processing.
$\mathtt{PENAL}$	The spring stiffness for contact problems $[\text{N}/\text{m}^3].$
$\mathtt{TSTEP}$	The size of the integration step for the central difference method $[\text{s}].$
$\mathtt{BETA}$	The parameter of the special form of the Rayleigh dumping matrix $\mathbf{C}=\beta\mathbf{M}.$
$[\mathtt{IN}]$	The list of node numbers.
$\mathtt{IREC}$	The record index number of the load case in the binary file `name.SOL`.
$\mathtt{ISET}$	The set index number.
$\mathtt{KPRIN}$	The key of printing of nodal quantities in each integration step.
	$=1$	displacements
	$=2$	displacements and velocities
	$=3$	displacements, velocities, and accelerations
$\mathtt{KQT}$	The key of initial conditions.
	$=1$	initial displacements
	$=2$	initial velocities
$X_0,Y_0,Z_0$	The constant initial vector in the direction of global coordinate axes.
$[X]_0$	The initial vector. The number of components (the length of the vector) must be the same as the number of degrees of freedom of the mesh.