Prediction method of bogie frame stress in locations under the load by brake

Abstract

To verify the strength of a bogie frame, it is important to understand the stress rightly in the bogie frame. Currently, running tests have to be carried out with strain gauges sticked at various measurement locations on the bogie frame, which is both time consuming and costly. Previous methods for predicting the stress have been proposed using transfer functions or neural networks based on axle box acceleration measured during running. However, it has been difficult to predict the stresses at locations under the brake load, such as the brake lever supports, using acceleration of axle box. In this paper, we propose a new prediction method for predicting bogie frame stresses at locations under the brake load using brake commands.