Track Structure Design Using Mathematical Models.

摘要

The objective of the report is to demonstrate the use of mathematical track structure models in the development of design charts. The models have been developed in Task 1,Mathematical Modelling,of the Track Structures Research Program,Contract DOT-FR-30038. The charts should enable the optimal selection of track components and to evaluate the structural performance of existing track components in a given loading environment. The criterion for acceptable track design is that the strength of the track structure on a fatigue basis not be exceeded and the Miner's rule is used. The charts are based on arbitrarily chosen wheel-rail load magnitudes. For vertical wheel-rail loading,the loading configuration consists of eight wheel loads and corresponds to that of two adjacent trucks of two coupled 100ton (90,720kg) cars. For lateral wheel-rail loading, a single lateral load applied to the base of one rail is used.