4.8.3.13. GET_FFLEX_NODERACC

GET_FFLEX_NODERACC subroutine returns an angular acceleration vector for a node of FFlex body. This is an auxiliary subroutine for Nodal_Force and Nodal_Force_Ext.

Table 4.71 Function Name
Language type	Subroutine
FORTRAN	call get_fflex_noderacc (ifbody,NodeSeq,MKID,nMK,Wdt,ErrFlg)
C/C++	get_fflex_noderacc (ifbody,NodeSeq,MKID[2],2, Wdt,&Errflg)

Table 4.72 Parameter information
Variable Name	Size	Description
ifbody	int	Sequential id of FFlex body defined in RecurDyn/Solver. This is a related argument with the 5^th argument of Nodal_Force_Ext subroutine.
NodeSeq	int	Node sequential id defined in RecurDyn/Solver. This is a related argument with the 6^th argument of Nodal_Force_Ext subroutine.
MKID	int[2]	An array of integer type. Each value should be zero or a marker id. 1^st value is defined as base marker. 2^nd value is defined as reference marker.
nMK	int	An integer variable for considering base and reference marker. If nMK is 0, then the subroutine returns a global angular acceleration vector of NodeSeq. If nMK is 1, then the subroutine calculates an angular acceleration vector considering base marker. If nMK is 2, then the subroutine calculates an angular acceleration vector considering base and reference marker.
Wdt	double[3]	An array of double precision type. The array size must be 3. 3 values mean a relative angular acceleration. \(\frac{d}{dt}\left\{ \mathbf{A}_{r}^{T}({{\mathbf{\omega }}_{FFlexNode}}-{{\mathbf{\omega }}_{b}}) \right\}\) Where, \({{\mathbf{\omega }}_{FFlexNode}}\) is a global angular velocity vector of NodeSeq. \({{\mathbf{\omega }}_{b}}\) is an angular velocity vector of the base marker (=MKID[0]).
Errflg	int	Error flag. If the result of this argument is -1 (means TRUE in Fortran logical value), there is no error. The others mean that there is an error.

Code Example

Refer to GET_FFLEX_NODEPOS.