Reseach On Testing Wheel-Rail Force Continuously On Ground

With the speed increasing of high speed railway, it is very important to find the accurate measurement of wheel rail force. Wheel rail force testing for vehicle dynamics and the theory of derailment research has important significance. In wheel-rail force many detection methods, ground test track method is low cost and relatively accurate method. The basic idea of the method is in the rail on the adhesive for resistance strain gauge, and according to a certain method consisting of bridge, through bridge output the calculated wheel-rail force numerical. This test method can be in the existing line conveniently without damaging the circuit structure, can very easily in a variety of tracks. But the existing ground for continuous measurement of wheel-rail force technique can not realize the continuous wheel rail force, in this paper, the main work is as follows:1. Analysis of railway track structure mechanical properties, because the test method is based on the rail strain derived test method, so we must first understand the track structure and mechanical properties.2. Analysis of existing in orbit strain paste piece means, according to the wheel rail complex mechanical state to choose a reasonable placement, this patch mode needs to meet to be able to make the greatest possible to eliminate other factors interference conditions.3. According to the actual situation of line, designed in a section within the wheel rail force continuous output patch group bridge approach, this method makes the wheel rail force can be tested in this section within a continuous output.4. Put the traditional BP neural network for wheel rail force of continuous output algorithm, to validate its feasibility, and using RBF neural networks for continuous wheel rail force numerical comparison, comparison the errors of the two methods. It is proved that BP neural network can be used for the wheel rail force calculation of continuous output.