Based on Galerkin variation principle,an elastic finite element analysis model of coupling friction heat for wheel/rail was put forward,and the relations between wheel/rail friction heat and rail expanded displacement in touched area,wheel/rail frictional temperature,contact strain and stress.

To deal with the problem that thermal flow density varies with time on absolutely sliding lining surface, this paper proposes on approximate method of calculating friction temperature in multi rope friction winder lining according to the integrate method of solution to thermal conduction problem.

Different with that of macrodimensional friction pairs in the common mechanical equipments,the surface topology of the lubricant film of microdimensional friction pairs is curved surface but not plane since the effect of surface tension,which affects the tribological characteristic of the microdimensional friction pairs.

In order to investigate the dynamics characteristics of flow field between frictional pairs in the hydro-viscous drive(HVD),an experimental rig was designed and manufactured,which was used for simulating the oil film flow field.

The wear mechanisms of the frictional pairs were discussed as well.

The effect of relative humidity on the static friction coefficients of four frictional pairs, namely, metal metal, metal graphite, metal TiN coating, and metal TiN coating pairs, was examined on a friction and wear tester made in our laboratory.