*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)	$\left[\frac{\text{1}}{\text{s}}\right]$
PIDRB	Rigid part identifier for reference motion. (Integer)
PSID	Part set identifier where damping is applied. (Integer)
DV2	Mass quadratic damping coefficient. (Real)	$\left[\frac{1}{m}\right]$
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.