| 汽轮机转子热应力在线监测与疲劳寿命分析 |
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| 引用本文： | 刘占生,黄世勇. 汽轮机转子热应力在线监测与疲劳寿命分析[J]. 汽轮机技术, 2008, 50(1): 9-12,28 |
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| 作者姓名： | 刘占生 黄世勇 |
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| 作者单位： | 哈尔滨工业大学能源科学与工程学院,哈尔滨,150001;哈尔滨工业大学能源科学与工程学院,哈尔滨,150001 |
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| 摘 要： | 对第三类边界条件转子非稳态导热微分方程,采用有限差分格式分析计算,实时在线监测转子应力变化.采用等效应变法,简化转子多轴应力状态模型,将转子多轴低周疲劳转化为单轴疲劳问题,基于线性损伤累积模型,利用雨流计数法对转子低周疲劳寿命进行了分析.
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| 关 键 词： | 热应力 疲劳寿命 等效应变法 雨流计数法 |
| 文章编号： | 1001-5884（2008）01-0009-04 |
| 收稿时间： | 2007-05-10 |
| 修稿时间： | 2007-05-10 |
The Turbine Rotor Thermal-stress Online Monitor and Fatigue Life Analysis |
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| LIU Zhan-sheng,HUANG Shi-yong. The Turbine Rotor Thermal-stress Online Monitor and Fatigue Life Analysis[J]. Turbine Technology, 2008, 50(1): 9-12,28 |
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| Authors: | LIU Zhan-sheng HUANG Shi-yong |
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| Abstract: | In this paper, for the unsteady thermal conduction differential equation with the third boundary condition, the finite-difference method is modelled and formulated to monitor the rotor thermal - stress online. The Equivalent Strain method is used, the multi-axial stress state model is simplified, and the multi-axial low cycle fatigue is translated into uniaxial fatigue model, based linear cumulative damage model, the rain-flow method is adopted to analyse and calculate the rotor low cycle fatigue damage. |
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| Keywords: | thermal - stress fatigue life equivalent strain method rain - flow method |
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