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首页> 外文会议>International Conference on Advanced Nondestructive Evaluation >Formulation of Reliability-Based Fatigue Assessment of a Car Body for a High Speed Train Passing Through Tunnels
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Formulation of Reliability-Based Fatigue Assessment of a Car Body for a High Speed Train Passing Through Tunnels

机译：通过隧道的高速列车对汽车体的可靠性疲劳评估的制定

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摘要

In designing the structures of railway rolling stocks, deterministic methods associated with the concept of a safety factor have been traditionally used. The deterministic approaches based on the mean values of applied loads and material properties have been used as safety verification for the design of the car body structures. The uncertainties in the applied loading for the high speed train and the strength of new materials in the structure require the application of probabilistic approaches to ensure fatigue safety in the desired system. Pressure loadings acting on the car body when the train passes through tunnels show reflected pressure waves for high-speed trains and they may cause a fatigue failure in vehicle bodies. In this paper, it is proposed that a fatigue design and assessment method based on a structural reliability that deals with the loading of pressure variations on a railway vehicle reflected in tunnels and the strength variations of material. Equation for the fatigue reliability index has been formulated to calculate the reliability assessment of a vehicle body under fluctuating pressure loadings in a tunnel. Considered in this formulation are the pressure distribution characteristics, the fatigue strength distribution characteristics, and the concept of stress-transfer functions due to the pressure loading.
机译：在设计铁路滚动股的结构时，传统上使用了与安全因子概念相关的确定方法。基于所施加负载和材料特性的平均值的确定方法已被用作汽车体结构设计的安全验证。高速列车应用负荷的不确定性以及结构中的新材料的强度需要应用概率方法，以确保所需系统中的疲劳安全。当火车穿过隧道时，在车身上作用的压力负荷显示出高速列车的反射压力波，它们可能会导致车身疲劳失效。在本文中，提出了一种基于结构可靠性的疲劳设计和评估方法，这些结构可靠性涉及在隧道中反映在隧道中的铁路车辆的压力变化和材料的强度变化。已经配制了疲劳可靠性指标的方程，以计算隧道中波动压力载荷下车体的可靠性评估。在该配方中考虑是压力分布特性，疲劳强度分布特性，以及由于压力负荷引起的应力传递功能的概念。

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