XU Lei, ZHAI Wan-ming. The Random Field Model for Track Structures and Vehicle-Track Coupled Stochastic Dynamic Analysis[J]. Applied Mathematics and Mechanics, 2017, 38(1): 67-74. doi: 10.21656/1000-0887.370370
 Citation: XU Lei, ZHAI Wan-ming. The Random Field Model for Track Structures and Vehicle-Track Coupled Stochastic Dynamic Analysis[J]. Applied Mathematics and Mechanics, 2017, 38(1): 67-74.

The Random Field Model for Track Structures and Vehicle-Track Coupled Stochastic Dynamic Analysis

doi: 10.21656/1000-0887.370370
Funds:  The National Basic Research Program of China (973 Program)（2013CB036205； 2013CB036206）;The National Natural Science Foundation of China（U1234209； 51478482; 51678507）
• Rev Recd Date: 2016-12-20
• Publish Date: 2017-01-15
• In view of the track structure as a system with stochastic parameters, the random field model for railway track systems was proposed and constructed. Then the finite element model for the track system and the multi-rigid-body model for the vehicle system were coupled based on the fundamental principle of vehicle-track coupled dynamics to establish the vehicle-track stochastic analysis model in which the temporal-spatial random variances of rail line parameters were taken into consideration. The numerical examples show that the proposed methods are reliable and efficient, and the randomnesses of railway line parameters have significant influences on dynamic responses of railway vehicle-track systems: for example, running insecurity of vehicles and damage aggravation of track structures may grow with the increases of variances of track structure parameters.
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