中国铁道科学2017，Vol.38Issue(2)：105-110,6.DOI:10.3969/j.issn.1001-4632.2017.02.16
重载货车车钩疲劳试验载荷谱的编制方法
Compilation Method for Fatigue Test Load Spectrum of Coupler on Heavy Haul Freight Car
摘要
Abstract
The compilation method for the test load spectrum of coupler on 10 000 t heavy haul freight car was studied on the basis of load-time history obtained from the tested coupler on a special line for coal transportation.The load-time history of the tested heavy haul freight car coupler was divided into four working conditions,namely,coal loading,loaded car operation,coal unloading and empty car operation.The coupler load was decomposed into two parts of trend load and small value load by Ncode data processing software.The trend load spectrum and measured load spectrum was compiled respectively by combining variable mean method and rain flow counting method.Although the load spectrum and measured load spectrum based on the trend load of the coupler were consistent in high load region,there was a big difference in low load region.Therefore,the coupler damage caused by small amplitude cyclic load was cumulated to the damage caused by trend load according to the fatigue damage equivalence principle,and the equivalent load enlarged by trend load was obtained.Then,the tensile load spectrum and compressive load spectrum for testing were established under different operating conditions based on the equivalent trend load.The compilation method for fatigue test load spectrum can greatly reduce the number of fatigue test of the coupler and improve the test efficiency.关键词
重载货车/车钩疲劳试验/试验载荷谱/损伤等效/损伤比Key words
Heavy haul freight car/Coupler fatigue test/Test load spectrum/Damage equivalence/Damage ratio分类
交通工程引用本文复制引用
薛海,李强,胡伟钢,刘文飞..重载货车车钩疲劳试验载荷谱的编制方法[J].中国铁道科学,2017,38(2):105-110,6.基金项目
中国铁路总公司科技研究开发计划项目(2015J007-M) （2015J007-M）
兰州交通大学青年科学基金资助项目(2014020) （2014020）
