【作者】 赵永翔； 杨冰； 张卫华；

【Author】 Zhao Yongxiang Yang Bing Zhang Weihua (Sta te key Labora tory of Traction Power, Sou thwes t Jiao tong Uni versi ty, Chengdu 610031, China)

【机构】 西南交通大学牵引动力国家重点实验室；

【摘要】 基于现场调研,探讨了我国高速重载车辆结构疲劳断裂可靠性与安全性的基础课题。自1997年实施提速战略以来,既有车辆结构疲劳裂纹提早大量出现,新设计车辆结构也不断出现疲劳断裂事故,铁路运输安全正面临严峻挑战。根据铁路运输现状和特点,阐述了建立轨道车辆结构系统服役载荷检测与动力学—有限元仿真模拟数据的分析方法体系,研究铸钢与焊接等结构初始质量和疲劳-维修交互作用下结构的安全性评价理论,发展复杂多级随机载荷下结构的疲劳可靠性设计方法,是其中主要基础课题。更多还原

【Abstract】 The issues are prospected on of the fatigue reliability and safety of Chinese high-speed and heavy-hauled trains on a basis of field investigations. Since the increased strategy of trains put into production in 1997, the fatigue cracking phenomena earlier than prediction for the past structures of vehicles have occurred frequently, and the phenomena have also appeared in the new designed vehicle’s structures. The safety of railway transportation is facing a strict challenge. By the investigations on the current situations and characteristics of China railway transportation, it is concluded that the service fatigue stress getting by non-destructive technology and dynamic-finite element simulation, the structure initial quality assessment of welded joints and cast steels and the safety theory at the interactive fatigue-maintenances, and the reliability design methodology under complicated and multi-graded random fatigue loading are the key basic issues in the future.更多还原