In this study, a load distributing device has been modelled to study its influence on the directional response of a vehicle. A new method has been introduced to compute the frictional forces. It has been observed that the device counteract the normal behaviour of the vehicle to achieve an emergency lane change manoeuvre. Moreover, it is also anticipated that it might cause a rollover after such a manoeuvre. Extreme turns with braking effect has been simulated and it was noted that the use of the device could be exploited to help prevent a rollover in these conditions. It has also been demonstrated that a device behind the fifth wheel transforms the turning behaviour from oversteer to understeer. Since a danger exists when performing a lane change manoeuvre, it is therefore clear that the moment arm, i.e. the distance behind the fifth wheel, should be limited; or better yet, the carrier should find a technique to lower the pressure in the device when a certain payload is carried (which would then limit the load redistribution). The method and computer program described in this work can be applied to the creation of prototypes of load distributing devices as it interrelates with the suspension of the vehicle. The effect of load distributing devices can now be modelled quickly and easily by using a computerised algorithm where a wide spectrum of design alternatives can be evaluated in a short period of time.
Effect of load-distributing devices on the stability of heavy vehicles
Der Einfluß von Ladungsverteilungseinrichtungen auf die Fahrstabilität von Lastkraftfahrzeugen
Heavy Vehicle Systems ; 4 , 1 ; 29-48
1997
20 Seiten, 24 Bilder, 10 Quellen
Aufsatz (Zeitschrift)
Englisch
Effect of load-distributing devices on the stability of heavy vehicles
Kraftfahrwesen | 1997
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