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引用次数: 0

摘要

在国内外对长基平车强度研究的基础上,提出了对长基平车车架结构解进行试验验证和对理论计算精度进行评估的必要性。介绍了一种进行长底座平板车资源循环疲劳试验的方法。介绍了确定长底座平板车强度的理论研究结果。给出了某长轴距平板车车架结构改进前后的耐久性循环疲劳试验研究结果。介绍了长底座平板车在试验耐久性循环疲劳试验阶段车架结构的变化和改进。给出了长基平板货车车架结构裂纹的起裂和发展位置。根据研究结果,确定了货车结构各构件的实际强度,选择了长底座平板车的设计方案,以防止疲劳失效,保证行车安全。验证了在设计阶段对长轴距平板车车架焊接接头疲劳强度评估方法进行改进的必要性。本文的内容将有助于干线铁路长基平板车新车型的建设和现有车型的现代化,以及在运行时提高其强度和使用寿命。
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EXPERIMENTAL STUDIES OF THE STRENGTH OF A LONG BASE FLAT WAGONS BY CARRYING OUT ENDURANCE CYCLIC FATIGUE TESTS
The need for experimental validation of structural solutions concerning the frame of long-base flat wagon and assessment of the accuracy of theoretical calculations by carrying out resource cyclic fatigue tests based on the results of the recent studies analysis in the research of the strength of long-base flat wagons, was established. The methodology for carrying out resource cyclic fatigue tests of a long-base flat wagon is presented. The results of theoretical studies on determining the strength of a long-base flat wagon are described. The results of experimental studies of endurance cyclic fatigue tests of the frame of a long-wheelbase flat wagon before and after structural improvement are shown. Structural changes and improvements of the frame of the long-base flat wagon at the stage of experimental endurance cyclic fatigue tests are presented. The place of initiation and development of a crack in the structure of the frame of a long-base flat wagon is shown. Based on the results of the research, the actual strength of the elements of the wagon structure was determined and the design of the long-base flat wagon was chosen in order to prevent fatigue failure and ensure the required operational safety. The need to improve the evaluation methods of fatigue strength of welded joints of the long-wheelbase flat wagons frames at the design stage has been proven. The content of the article will contribute to the construction of new models of long-base flat wagons for mainline railway and the modernization of existing models, as well as to increase their strength and service life while in operation.
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发文量
28
审稿时长
27 weeks
期刊最新文献
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