*DAMPING_RELATIVE

LS-DYNA Input Interface KeywordDefines the Rayleigh mass damping relative to the average velocity of the set of nodes or rigid part motion.

Format

(1) (2) (3) (4) (5) (6) (7) (8)
*DAMPING_RELATIVE
CDAMP FREQ PIDRB PSID DV2 Fct_ID

Definition

Field Contents SI Unit Example
CDAMP Fraction of critical damping.

(Real)

FREQ Damping frequency.

(Real)

[ 1 s ]
PIDRB Rigid part identifier for reference motion.

(Integer)

PSID Part set identifier where damping is applied.

(Integer)

DV2 Mass quadratic damping coefficient.

(Real)

1 m MathType@MTEF@5@5@+= feaahGart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaamWaaeaada WcaaqaaiaaigdaaeaacaWGTbaaaaGaay5waiaaw2faaaaa@39A7@
Fct_ID Function identifier defining damping coefficient scaling factor as a function of time. CDAMP will be ignored if Fct_ID is non-zero.

(Integer)

Comments

  1. This keyword maps to /DAMP/VREL.