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首页> 外文期刊>Chinese Journal of Mechanical Engineering >RESEARCH PROGRESS ON STRUCTURAL FATIGUE RELIABILITY DESIGN AND ANALYSIS METHODS OF CHINESE RAILWAY VEHICLES
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RESEARCH PROGRESS ON STRUCTURAL FATIGUE RELIABILITY DESIGN AND ANALYSIS METHODS OF CHINESE RAILWAY VEHICLES

机译：中国铁道车辆结构疲劳可靠性设计与分析方法研究进展

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摘要

A state-of-art review is given to the new advances on fatigue reliability design and analysis methods of Chinese railway vehicle's structures. First, the structures are subject to a complicated random fatigue stressing history and this history should be determined by combining dynamic simulation and on-line inspection. Second, the random fatigue constitutions belong to an intrinsic fatigue phenomenon and a probabilistic model is developed to well describe them with two measurements of survival probability and confidence, similar model is also presented for the random stress-life relations and extrapolated appropriately into long fatigue life regime. Third, concept of the fatigue limit should be understood as the fatigue strength at a given fatigue life and a so-called local Basquin model method is proposed for measuring the random strengths. In addition, drawing and application methods of the Goodman-Smith diagram for integrally characterizing the random fatigue strengths are established in terms of ten kilometers. Fourth, a reliability stress-based method is constructed with a consideration of the random constitutive relations. These new advances form a new frame work for railway fatigue reliability design and analysis.
机译：对中国铁路车辆结构疲劳可靠性设计和分析方法的最新进展进行了综述。首先，结构要经历复杂的随机疲劳应力历史，并且应结合动态模拟和在线检查来确定该历史。其次，随机疲劳构成属于一种固有疲劳现象，并建立了一个概率模型来通过对生存概率和置信度的两次测量来很好地描述它们，还为随机应力-寿命关系提出了类似的模型，并适当地推断出较长的疲劳寿命政权。第三，疲劳极限的概念应理解为给定疲劳寿命下的疲劳强度，并提出了一种所谓的局部Basquin模型方法来测量随机强度。另外，以十公里为单位建立了用于整体表征随机疲劳强度的古德曼-史密斯图的绘制和应用方法。第四，考虑随机本构关系，构造了基于可靠性应力的方法。这些新进展为铁路疲劳可靠性设计和分析提供了新的框架。

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