摘要
从服役失效模式、原因与后果入手,研究了轨道车辆轮对可靠性与安全性相关的关键力学问题与进展.首先总结了5种车轮踏面失效与4种非踏面失效、5种车轴失效和6种轴承失效模式.阐述了与失效模式相关的成因和后果.讨论了可能的解决方法.然后介绍了超长疲劳寿命可靠性分析、光滑表面疲劳短裂纹理论与结构安全评价方法和轮轨接触材料与形貌匹配3个关键力学问题与研究进展.进一步展望了轮轨接触多学科优化、考虑几何与载荷约束及环境影响的轴承接触疲劳理论和轮对集成可靠性与安全性分析评价方法是未来3个值得研究的关键力学问题.
Key solid mechanics issues and research progresses relative to reliability and safety in service are reviewed based on investigations of damage modes. The modes five for wheel tread, four for wheel out of tread, five for axle and six for bearing are summarized and the corresponding causes and effects are introduced for railway wheel set. The possible solutions are discussed. And then, the three key issues and progresses are introduced. They are the fatigue reliability analysis covering super long life regime; the smooth surface short fatigue crack behaviour and structural safety assessments; and the matching in materials and morphology of the connectors between wheel tread-track. Multi-principle optimum of the wheeltrack contact connector; bearing contact design and analysis considering the geometrical, loading and envi- ronmental constraints; and integrated reliability analysis and safety assessment for wheel set are prospected as the valuable fields of the future research for railway vehicle wheel set.
出处
《固体力学学报》
CAS
CSCD
北大核心
2010年第6期716-730,共15页
Chinese Journal of Solid Mechanics
基金
铁道科技发展计划(2008J007D
2009J016)
863计划(2006AA04Z406)
国家自然科学基金(50821063
50575189)资助
关键词
铁路
轮对
疲劳与断裂
可靠性
安全性
railway, wheel set, fatigue and fracture, reliability, safety
