This subroutine generates a user - defined contact force.
|
Language type |
SubRoutine |
|
FORTRAN |
contact force (time,upar,npar,pen,rvel,jflag,iflag,result) |
|
C/C++ |
contact force (double time, double upar[], int npar, double pen, double rvel[], int jflag, int iflag, double* result) |
Parameter information
|
Variable Name |
Size |
Description |
|
time |
double |
Current simulation time of RecurDyn/Solver. |
|
upar |
double[30] |
Parameters defined by the user. The maximum size of array is 30. |
|
npar |
int |
Number of user parameters. |
|
pen |
double |
Penetration at the contact point. |
|
rvel |
double[3] |
Relative velocity between contact pair w.r.t. contact reference frame. |
|
jflag |
int |
When RecurDyn/Solver evaluates Jacobian, the flag is true. Otherwise, the flag is false. |
|
iflag |
int |
When RecurDyn/Solver makes its initial call to this routine, the flag is true. Otherwise, the flag is false |
|
result |
double[6] |
Returned force vector and six dimensional arrays. Though the returned force has six arrays, only three terms of the translational force are available. |
Example
Figure 1 Contact force model using Contact force user subroutine
Note
If the user wants to run this model using a user subroutine, the user can refer it in the directory (<install dir>/Help/usub/**).