Gam1.1

Gam2.1

NF.1

NS.1

TTimuRR1

TTimuLR1

XF3

XR3

YS3

22

Card:  Field

Variable

Description

Original Units

Metric Units

Vehicle 1 Articulated Vehicle/Trailer Option Inputs: (Card 2 of 2 required)

Tractor-trailer option articulation angle limit stops definitions

These inputs are used to define the articulation stop properties of the tractor-trailer system.  For the m-smac articulation option,  an articulation  limit is simulated by means of a linearly increasing resistance to articulation which occurs between the angles gam1.1 and gam2.1. The resistance is defined by the friction moment (NF.1) and the angular stop moment (NS.1)

22:1

Gam1.1

Beginning angle for increased resistance of V1 trailer articulation  

deg

22:2

Gam2.1

Maximum articulation angle for V1 trailer.

Deg

22:3

NF.1

V1 trailer friction moment.

lb-in

N-cm

22:4

NS.1

V1 trailer angular stop moment.

lb-in

N-cm

The following Optional Tirmu inputs are permits the simulation of individual tires which have drag factors different than the nominal MU (i.e., metal gouging, etc.).

If entered as 0.0, program assumes default value of 1.0 (normal).

An input value of 0.86 would produce an effective friction of 0.60 for a tire on a nominal friction coefficient of 0.70

22:5

TTirmuRR1

V1 trailer RR trailer tire Tirmu friction multiplier factor

22:6

TTirmuLR1

V1 trailer LR trailer tire Tirmu friction multiplier factor

22:7

XF3

Distance from the CG of the trailer of Vehicle 1 to the front of the trailer

in

mm

22:8

XR3

Distance from the CG of the trailer of Vehicle 1 to the rear end of the trailer

in

mm

22:9

YS3

Overall width of the trailer of Vehicle 1 (may also be entered as trailer ½ width. Value compared with the track width, if less than the track width, assumed to be ½ width)

in

mm