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Density of railway wagons , load , speed , improve railway transport capacity of the three elements . Datong, Qinhuangdao coal Line is already on the basis of the 2 million tons of heavy haul train is about to open the line to 30,000 tons heavy haul train . Since the speed , overloading , C80B truck body structure has appeared on Fatigue Cracking , such as the end wall , center plate girder side column parts crack , Transportation Safety larger , and therefore be considered in the design phase fatigue The problem can improve our truck equipment design technology . Our the lorry current structure strength design specifications and test standards are not perfect, especially the lack of fatigue design specifications and testing standards in line with China's actual use conditions . The updated design specifications and test standards of structural strength of our trucks , has become a very urgent work to enhance our the lorry body structure design level . The end wall of the thesis C80B Gondola Car bodywork as the research object , on the basis of the dynamic stress testing of the 20,000 tons of heavy haul train measurement point on the end wall of the load - time history data processing , rainflow counting , respectively, in accordance with rectangular distribution and triangular distribution , the preparation of the end wall load spectrum ; software to establish the use of Solidworks 3D the C80B bodywork entity model , using ANSYS finite element analysis software center plate load , longitudinal load and the end wall of the impact of the three load cases center plate load stress calculation , find the location of the end wall stress ; then , respectively, based on the calculation method of the fatigue damage in the AAR standards and the standards of BS EN1993-1-9 , Datong-Qinhuangdao line 2 tons of heavy haul train measured dynamic stress test spectrum, longitudinal load spectrum and the load spectrum of the end wall of the prepared herein , the fatigue damage of the above - mentioned parts of the calculation , and thus obtain their cumulative damage ; final statistical damage in various parts of the end wall , respectively, in accordance with AAR standards and BS EN1993 -1 -9 standard estimate the fatigue life of the various parts of the end wall . Analyzed by calculating the end wall support beams and the beams in the transverse and longitudinal weld intersection of synthetic injury , approximately 1.58e-02, its heavy vehicle life of 40,000 km . Followed by a side wall support beams and the beam transverse weld synthetic damage is about 2.13e-03, the fatigue life of 290,000 km .
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