Study On Load Characteristics And Spectrum For Key Components Of CRH6EMU’s Bogie

CRH6intercity EMU is a new transport tool designed for intercity rail transit demand of Chinese regional economic development and the rise of the urban group. The bogie is one of the most important components of the EMU system, the condition of which is directly related to the operation quality and safety.This paper studies on the axle box spring,allocation arm, traction-rod and anti roll bar, based on the finite element calculation results to determine the load identification point of the key components above.Through the MTS calibration test to get load-strain coefficient Then test the load of the key components directly and continuously on the Dazhou-Chengdu railway. The main content of this paper is as following:1. Study on load characteristic of axle box springs,allocation-arrn,traction-rod and anti roll bar under different conditions of the Dazhou-Chengdu railway from the perspective of time domain and frequency domain;2. Build the load spectrum of axle box springs,allocation arm, traction-rod and anti roll bar. Analysis main source of each level load amplitude,frequency variation and calculate the damage ratio of each level.3. Through the distribution fitting and hypothesis testing of load spectrum sample by using the method of mathematical statistic s,then deduce the maximum value of bad and build statistics load spectrum;4. Based on the statistics bad spectrum, use the equivalent bad method to get fatigue test equivalent bad of alex spring,allocation arm, traction-rod,anti roll bar, then compare them with the data from UIC615-4standard. At the same time provide a reference for the design bad of bogie key components and fatigue simulation test for Chinese Railway conditions.