摘要
以城轨列车转向架铝合金枕梁为研究对象,基于Miner线性累积损伤理论和NASA小载荷S-N曲线延伸法,对枕梁主要焊缝进行了疲劳寿命评估.依据线路实测数据得到枕梁的载荷工况,设计了枕梁的疲劳试验方案.对没有通过疲劳试验的区域,采取了优化连接筋板厚度和减小应力集中等措施.结果表明铝合金枕梁新结构能够满足疲劳寿命要求.
It takes the aluminum alloy bolster of bogie as the study object in this paper. The fatigue life of main welds in bolster was evaluated based on Miner linear cumulative damage theory and NASA small load S-N curve extension method. Calculated work conditions were obtained from measured data in field tests, and fatigue test scheme for bolster was designed. Then measurements of optimizing the thickness of joint stiffeners and minimizing stress concentration were taken in areas that failed to pass the fatigue test. Finally it is verified that the new aluminum alloy bolster of bogie can meet the demand of fatigue life after improvement.
出处
《北京交通大学学报》
CAS
CSCD
北大核心
2017年第1期62-67,共6页
JOURNAL OF BEIJING JIAOTONG UNIVERSITY
基金
国家科技支撑计划项目资助(2015BAG12B01-10)
铁道部科技发展项目资助(2014J004-A
2015J001-E)~~
关键词
转向架
铝合金
焊接枕梁
疲劳寿命
bogie
aluminum alloy
welded bolster
fatigue life