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首页> 外文期刊>International Journal of Fatigue >On-line fatigue-creep monitoring system for high-temperature components of power plants
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On-line fatigue-creep monitoring system for high-temperature components of power plants

机译：电厂高温部件在线疲劳蠕变监测系统

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摘要

A system has been developed for on-line monitoring of various aging effects, such as fatigue, creep and fatigue-creep interaction. This can take care of the fluctuations of the process fluid temperature, pressure and flow rate and the piping loads such as axial Forces and bending moments. The system converts the plant transients to temperature/stress responses using the finite element Method and the transfer function approach. The fatigue usage factor is computed using the rainflow cycle counting algorithm. The Creep damage index is evaluated from the computed temperature and stress histories and the material creep rupture curve. Examples Of a thick pipe and a shell-nozzle junction under mechanical and thermal loads are studied. This system is useful in life estimation And life extension programs of thermal power plants, nuclear power plants, chemical process industries, and so on.
机译：已经开发出一种用于在线监测各种老化效应（例如疲劳，蠕变和疲劳蠕变相互作用）的系统。这样可以解决过程流体温度，压力和流量以及管道负载（例如轴向力和弯矩）的波动。该系统使用有限元方法和传递函数方法将植物的瞬变转换为温度/应力响应。使用雨流循环计数算法计算疲劳使用系数。蠕变损伤指数是根据计算出的温度和应力历史以及材料蠕变断裂曲线评估的。实例研究了在机械和热负荷下的厚管和壳-喷嘴接合处。该系统可用于火力发电厂，核电厂，化学过程工业等的寿命估算和寿命延长程序。

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