THE TURNING RESISTANCE OF TRACKED VEHICLES; INFLUENCED BY LATERAL ELASTICITIES OF THE RUNNING GEAR AND THE TRACKS

摘要

When a tracked vehicle is driving in a curve the turning resistance is added to the motion resistances of straight ahead motion. Previous analytical models to describe the turning resistance do not consider the complex friction phenomenon that occurs during a turning manoeuvre. These former models are based either on the principle of isotropic Coulomb's friction or on empirical statements MEMOKET, a new developed mechanical model at the Institute of Automotive Engineering, does not use empirical measurements carried out with the complete tracked vehicle. Design parameters of the running gear, such as the real friction behaviour of the rubber track pad and especially the lateral elasticities of the rubber, the tracks, the rocker arms and the track rollers, are included. The variation of the design parameters concerning the reduction of the turning resistance can be discussed. SIMKET, another analytical model for kinematic and dynamic studies, uses the multibody method ADAMS. By using MEMOKET as well as by using SIMKET field measurements with a complete vehicle can be avoided.