Study On C80B Body's Load-Stress Transfer Relations And Fatigue Damage

At present, China's railway freight moving speed, heavy load direction, the Datong-Qinhuangdao line is already on the 2 million tons train, heavy haul freight rail technology for a higher requirement. With the improvement of freight speed and load, making the body parts of more severe operating conditions, the fatigue failure problems have become increasingly prominent, and would pose a serious threat to road safety.In this paper,20,000 tons of heavy C80B Datong-Qinhuangdao line Gondola Car body as the research object, research on the impact of body structural components of the load caused by large-and stress transfer between the key parts of the body fatigue damage analysis of fatigue on the truck body structure provide the basis for the design life. Research includes the following four parts:1.Railway heavy goods vehicle body vertical rise and fall by a larger, longitudinal tension and compression, rolling, reverse the effect of such loads, these loads to the fatigue failure is the main way of body structure. By analyzing the formation mechanism of the four loads, establishment of the process and methods2.Datong-Qinhuangdao line by line access to the actual type of truck body C80B vertical (center plate), vertical (coupler), rolling and torsional loads-time histories and body fatigue on the key parts of the stress-time history and into 16 load spectrum preparation and stress spectrum.3.Using the software built C80B HYPERMESH type truck body finite element model, using ANSYS software to load and strength analysis were calculated by the truck body parts on the load of the critical fatigue-the stress transfer coefficient, combined with the measured Typical load-time domain response of the stress process of measuring points on the body of the load-the stress of passing a detailed relationship.4.Use of SN curves, MINER linear cumulative damage theory, the stress spectrum measured on the body and the measured load spectra corresponding to the fatigue damage calculation, checking the damage in the load spectrum based on the life of C80B were assessed body analysis.Points in all parts of the body are safe and reliable. KEYWORDS:C80B body; load/stress spectrum; load-stress transfer relationship; fatigue damage; life assessment...