| As the largely speeding-up of our country's trains of passengers, a series of fatigue damage problems come out. Particularly, there are fatigue cracks in the junction of horizontal side beam of 209 series of bogie frames, which is quite a serious trouble. This crack not only affects the daily rail transport, but also has large influences on the safety of trains. What this paper researches is aimed at 209T and 209P bogie frames, which are manufactured from Tangshan Track Train corporatin of CNR, studying the weld during the transport.According to the parameters provided by Tangshan track trains corporation, and refer to"UIC515-4 regulations" defined by the national railway union, firstly, calculating static strength and fatigue strength of the bogie frames of 209T and 209P in simulation condition using ANSYS software. After analyzing the results, we find out that 209 bogie frame can not meet to the designing requirements. So, the structure of 209 frame has to be reinforced. According to "Trains structure examining and repairing and equipments", which regulates how to design, we design 6 proposals of 209T frame and 3 proposals of 209P frame. Then, we calculate each proposal's static strength and fatigue strength referred to UIC515-4, and according to technological feasibility, to select the optimum one.The 209T and 209P reinforced bogie frames are tested in a real line twice, the line is from Lanzhou to JiaYuguan, which is bad condition for the train's using, to make an experiment, and the vehicles are linked to a formal train in order to reflect the real condition of train's stress well. After treating and analyzing the stress data, the 209 frames are evaluated fatigue strength by using Goodman curve. Through the theory of Nominal stress and some related theories, to calculate the stress equivalent amplitude in condition of 12million kilometers, and make an assessment for the experiment of the optimum ones accprding to the basic performance of welded joints. |
PDF Full Text Request