TCON |
TEPS |
DAMPT0 |
DEPS |
IDUMP |
NOCOLL |
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AMuSnag |
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18 |
Card: Field |
Variable |
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Description |
Original Units |
Metric Units |
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This card includes additional optional inputs for the SNAG Impulsive Restraint Option. |
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18:1 |
TCON |
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Moment constraint option. For ABS(
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lb-in |
N-m |
18:2 |
TEPS |
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Moment constraint null band. For values of
ABS ( |
rad/sec |
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18:3 |
DAMPT0 |
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Linear damping option. For velocity of the SNAG point movement greater than DEPS, apply coulomb damping of magnitude DAMPT0. |
lb-sec/in
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N-sec/cm |
18:4 |
DEPS |
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Linear damping null band. For values of SNAG point velocity <DEPS, apply viscous resistance.DAMPT0 |
in/sec |
cm/sec |
18:5 |
IDUMP |
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Option for additional DUMP of information related to the SNAG. |
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18:6 |
NOCOLL |
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Coll option. If=1, turn off collision forces (i.e. no calls to subroutine coll) for duration of the SNAG. (This option is useful for situations where two vehicles lock together for a prolonged period of time after the primary collision. Use caution with this option as the collision routine is disabled from TSBEG (Card 18, field 1) until the end of the simulation run.) |
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18:7 |
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Currently not used |
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18:8 |
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Currently not used |
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18:9 |
AMUsnag |
μsnagv |
Inter-vehicle SNAG friction force coefficient: During the impulsive constraint this coefficient of friction can be used to model tangential forces between the two vehicle structures when the corresponding adjacent surfaces of V1 and V2 are moving with respect to each other (at a velocity greater than ζV). The friction force is perpendicular to the SNAG force and it opposes relative motion with a value equal to μsnagv times the SNAG force. If used, this value should normally be set to be equal to or less than AMU (card 13, field 7), the inter-vehicle friction coefficient. |
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