Modeling and simulation technologies play an important role in the operation, diagnosis of the current state and prediction of changes in various mechanical systems. The most effective approach for the study of nonlinear friction systems is the use of the method of physical and mathematical modeling, which is based on the construction of a mathematical model of a quasi-linear subsystem of a machine or mechanism and the creation of a physical model of a substantially nonlinear friction subsystem. Fundamentally new approaches have been developed to solve the problems of optimization, increasing the efficiency and competitiveness of non-linear technical systems using the example of the wheel-rail tribosystem. Proposed technology of metal cladding of locomotive wheel band and implementation of anisotropy of friction coupling provide significant increase of efficiency of “wheel-rail” tribosystem.
One of the negative effects arising in the course of operation of a vehicle wheel is out-of-balance condition. Disbalance of a car wheel can be caused by various reasons, including change in geometrical form of the rim, violation of norms of operation, non-optimal position of the tire in relation to the rim. Change of geometry is caused by operation of the rim, casual reasons, as well as influence of external conditions of work and rim storage. Latent faults, construction overload, etc. belong to casual reasons. Results of the experiments fulfilled show that in most cases violation of the geometrical form of a rim, which sometimes cannot be defined by eye is the reason of increase in disbalance of a wheel. A stand for control of geometry of rim and a device allowing to perform "optimization" of car wheels on the basis of mathematical model of process of optimization of tire position in relation to the rim in the conditions of dynamic balancing of wheels have been developed.
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