A gumiabroncs-talaj kapcsolatában lejátszodó dinamikus energiatranszport folyamatok vizsgálata = Investigation of the dynamic energy transport process in the soil tyre interaction

Terepen tortenő jarműmozgas ket jelentős vesztesege a gordulesi ellenallas es a szlip. A ket veszteseg hatassal van egymasra, azonban a folyamatok tisztazasa vegett celszerű azokat kulon vizsgalni. A terep egyenetlensege, a talaj inhomogenitasa miatt jelentős lengesek alakulnak ki, a gordulesi ellenallas nagysaga menet kozben folyamatosan valtozik. A kerek alatt a talaj harom iranyban deformalodik. A jarmű sulyereje fuggőleges talajdeformaciot okoz. Ezt a deformaciot a terepprofil gerjesztette lengesek tovabb fokozzak. A kerek alatt a talaj keresztiranyban is deformalodik. Ezt a jarmu keresztiranyu lengesei hozzak letre. Az előbb emlitett vesztesegek a gumiabroncs es talajra vonatkozo gordulesi ellenallas komponensei. A harmadik komponense a talajdeformacionak, a talaj (haladasi irannyal parhuzamos) vizszintes iranyu deformacioja. Ezt viszont a gumiabroncs-talaj kapcsolataban letrejovő szlip hozza letre, energiaszuksegletet tehat a szlipveszteseg tartalmazza. Huzott es tolt kerekeknel, ahol jellemzően kis mertekű negativ szlip van, kis vizszintes iranyu talajdeformacio jon letre (kerekturas jelensegevel nem szamolva). Hajtott kereknel lenyegesen nagyobb szlip is keletkezhet, nagyobb talajdeformaciot okozva. Munkankban a fentebb emlitett talaj es gumideformacios vesztesegeket meghataroztuk meg. Jarműkiserletek alapjan elkulonitettuk a gordulesi ellenallas veszteseget a szlipvesztesegtől. A vizsgalat eredmenyekeppen a ket veszteseget komponensekre bontottuk. | Two of the major sources of loss when a vehicle is traversing terrain - especially on soft soil - are rolling resistance and slip. In spite of the two losses have effect of each other, it is better to analyse separately them due to clarification. The rolling resistance continually varies during motion. The unevenness of the terrain and the inhomogeneity of the soil give rise to substantial vertical vibrations which change the magnitude of deformations. There is three-dimensional soil deformation under the tyre. By the vehicle?s weight there will be a significant vertical soil deformation. The terrain profile generated vertical vibration increases this deformation. There is lateral soil deformation under the tyre as well. This deformation basically caused by the lateral vibration of vehicle. The previous mentioned losses are the components of rolling resistance. The third component of the soil deformation is the horizontal (parallel to the moving direction) deformation. This deformation caused by slip. In case of pushed wheel, where the slip is little, the horizontal soil deformation is small (ignore the wheel bulldozer effect).In case of driven wheel the slip is higher so the horizontal soil deformation is higher as well. This paper reports a determination of rolling resistance components and slip loss through field experiments designed to distinguish rolling resistance losses from slip loss. The test results gave the components of rolling resistance and slip.