Reliability design method for steam turbine blades

被引：0
作者：
Shi J. [1 ]
机构：
[1] Shanghai Power Equipment Research Institute
来源：
Frontiers of Energy and Power Engineering in China | 2008年 / 2卷 / 4期
关键词：
Blade; Fatigue strength; Reliability design; Steam turbine; Vibration;
D O I：
10.1007/s11708-008-0073-7
中图分类号：
学科分类号：
摘要：
Based on theories of probability and statistics, and taking static stresses, dynamic stresses, endurance strength, safety ratios, vibration frequencies and exciting force frequencies of blades as random variables, a reliability design method for steam turbine blades is presented. The purport and calculation method for blade reliability are expounded. The distribution parameters of random variables are determined after analysis and numerical calculation of test data. The fatigue strength and the vibration design reliability of turbine blades are determined with the aid of a probabilistic design method and by interference models for stress distribution and strength distribution. Some blade reliability design calculation formulas for a dynamic stress design method, a safety ratio design method for fatigue strength, and a vibration reliability design method for the first and second types of tuned blades and a packet of blades on a disk connected closely, are given together with some practical examples. With these methods, the design reliability of steam turbine blades can be guaranteed in the design stage. This research may provide some scientific basis for reliability design of steam turbine blades. © 2008 Higher Education Press and Springer-Verlag GmbH.
引用
收藏
页码：363 / 368
页数：5
相关论文
共 5 条
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  • [2] Kapar K.C., Lamberson L.R., Reliability in Engineering Design, (1977)
  • [3] Shi J., Study on reliability design for fatigue strength of steam turbine blades, Proceedings of the 5th Notional Conference on Fatigue, (1991)
  • [4] Shi J., Statistical analysis for test frequencies of steam turbine blades, Turbine Technology, 2, pp. 27-33, (1987)
  • [5] Shi J., Yang Y., Sun Q., Study on design criteria of strength and vibration as well as life for subcritical and supercritical steam turbines, Chinese Journal of Mechanical Engineering, 41, pp. 189-192, (2005)
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