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基于有限元法的汽轮机轴系磨损故障处理

FEA-Based Processing Measures on Shafting Abrasion Fault of Steam Turbine
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摘要 汽轮机轴系磨损部位的合理处理关系到机组的运行安全,为了使处理方案更加科学合理,采用有限元软件ANSYS建立轴系磨损部位的局部有限元模型;通过合理设置边界条件,求出了不同处理方案下磨损部位的应力集中系数,为方案的优化选择提供依据。以某电厂磨损故障为例,采用该方法对处理方案进行优化,计算结果表明,优化后的方案较大幅度地降低了磨损部位的应力集中系数,为机组的安全运行提供了可靠的保障,说明该方法是有效可行的。本文提出的方法适用于类似故障的处理。 Dealing properly with the wear parts of shafting is very important for the safe operation of the steam turbine units.In order to get a more scientific and rational processing scheme,a FEM model is built for the wear parts of shafting using the software ANSYS;by setting appropriate boundary conditions,factor of stress concentration of wear parts for different processing schemes is studied and it provides the basis for scheme optimization.As an example,the processing schemes are optimized for the wear-out failure of a power plant.The results show that the optimized scheme greatly reduces the factor of stress concentration,which provides reliable and safe unit operation.The study proves that the method is feasible and can be used for processing of other similar failure.
作者 庞乐 郭佳雷
出处 《现代电力》 2011年第5期63-67,共5页 Modern Electric Power
关键词 汽轮机 轴系 磨损 有限元法 应力集中系数 steam turbine shafting abrasion finite element method stress concentration factor
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