Some Special Unsteady Problems in Engineering

Abstract

Longitudinal dynamics of a train usually involves the tasks of calculated and experimental definition of dynamic longitudinal forces in coupling devices between carriages. The greatest importance has calculations of unsteady operation conditions of a train: starting, car collisions, braking, and so forth. Initial approaches for the calculation of longitudinal dynamic loads in a train were proposed by Zhukovsky (published in 1937) and later refined in the works of Lasar’an (1949), Blokhin and Manashkin (1982), Pershitz (1982), and others. A model of a train as a chain of discrete rigid masses connected by deformable links has got wide practical applications. The presence of a large number of nonlinear inter-car couplings with gaps complicates the application of more realistic discrete-continual models of a train including traditional FEM.