*CONSTRAINED_JOINT_STIFFNESS
LS-DYNA Input Interface KeywordDefine a stiffness, stop angles and friction for rotational DOFs of a joint between two rigid bodies.
Format
(1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) |
---|---|---|---|---|---|---|---|
*CONSTRAINED_JOINT_STIFFNESS_{OPTION} |
(1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) |
---|---|---|---|---|---|---|---|
Title |
(1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) |
---|---|---|---|---|---|---|---|
JSID | PIDA | PIDB | CIDA | CIDB | |||
LCIDPH | LCIDTH | LCIDPS | LCIDDPH | LCIDDTH | LCIDDPS | ||
ESPH | FMPH | ESTH | FMTH | ESPS | FMPS | ||
NSAPH | PSAPH | NSATH | PSATH | NSAPS | PSAPS |
Definition
Field | Contents | SI Unit Example |
---|---|---|
JSID | Joint ID. (Integer) |
|
Title | Joint title. (Character, maximum 70 characters) |
|
PIDA | Part ID for first rigid component. (Integer) |
|
PIDB | Part ID for second rigid component. (Integer) |
|
CIDA | Coordinate system for the first rigid
component. (Integer) |
|
CIDB | Coordinate system for the second rigid
component. (Integer) |
|
LCIDPH | Curve ID for moment versus angle in radians around PHI
axis. (Integer) |
|
LCIDTH | Curve ID for moment versus angle in radians around THETA
axis. (Integer) |
|
LCIDPS | Curve ID for moment versus angle in radians around PSI
axis. (Integer) |
|
LCIDDPH | Curve ID for damping moment versus rotational velocity around
PHI axis. (Integer) |
|
LCIDDTH | Curve ID for damping moment versus rotational velocity around
THETA axis. (Integer) |
|
LCIDDPS | Curve ID for damping moment versus rotational velocity around
PSI axis. (Integer) |
|
ESPH | Elastic stiffness for friction and stop angle around PHI
axis. (Integer) |
|
FMPH |
(Integer) |
or None |
ESTH | Elastic stiffness for friction and stop angle around THETA
axis. (Integer) |
|
FMTH |
(Integer) |
or None |
ESPS | Elastic stiffness for friction and stop angle around PSI
axis. (Integer) |
|
FMPS |
(Integer) |
or None |
NSAPH | Stop angle in negative PHI direction. (Real, positive) |
|
PSAPH | Stop angle in positive PHI direction. (Real, positive) |
|
NSATH | Stop angle in negative THETA direction. (Real, positive) |
|
PSATH | Stop angle in positive THETA direction. (Real, positive) |
|
NSAPS | Stop angle in negative PSI direction. (Real, positive) |
|
PSAPS | Stop angle in positive PSI direction. (Real, positive) |
Comments
- This keyword maps to /SPRING, /PROP/TYPE45 (KJOINT2) and /PART.
- It works in combination with kinematic joint and determines stiffness, friction, and stop angles for rotational degrees of freedom for joints interconnecting rigid components, PIDA and PIDB.