RESEARCH ON SIZE EFFECT OF COMBINED ROTOR CONSIDERING MICROCRACK

ZHU ZhuoPing; WANG AiLun; SHAO ShiCong; LIU XiangJun

doi:10.16579/j.issn.1001.9669.2019.06.028

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RESEARCH ON SIZE EFFECT OF COMBINED ROTOR CONSIDERING MICROCRACK

更新时间：2022-09-22

- RESEARCH ON SIZE EFFECT OF COMBINED ROTOR CONSIDERING MICROCRACK
- Journal of Mechanical Strength Vol. 41, Issue 6, Pages: 1454-1459(2019)
- 作者机构：
  
  1. 中南大学高性能复杂制造国家重点实验室
  2. 中南大学机电工程学院
  3. 中南大学轻合金研究院
- 作者简介：
- 基金信息：
- DOI：10.16579/j.issn.1001.9669.2019.06.028
  CLC：
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ZHU ZhuoPing, WANG AiLun, SHAO ShiCong, et al. RESEARCH ON SIZE EFFECT OF COMBINED ROTOR CONSIDERING MICROCRACK. [J]. 41(6):1454-1459(2019)
DOI：

ZHU ZhuoPing, WANG AiLun, SHAO ShiCong, et al. RESEARCH ON SIZE EFFECT OF COMBINED ROTOR CONSIDERING MICROCRACK. [J]. 41(6):1454-1459(2019) DOI： 10.16579/j.issn.1001.9669.2019.06.028.

摘要

组合转子模化放大或缩小过程中,由于尺寸效应的存在,微裂纹扩展对不同尺寸组合转子动力学性能影响规律尚不明确。应用相似理论的量纲分析法简要介绍微裂纹扩展过程中存在的"尺寸效应",并以某重型燃气轮机组合转子原型及其2. 3倍缩尺模型和1. 3倍放大模型为研究对象,分析了初始微裂纹随组合转子尺寸同比例变化和不随组合转子尺寸变化两种情况下,组合转子固有频率漂移情况。结果表明:用简单的Paris公式分析因微裂纹扩展导致不同尺寸组合转子固有频率漂移时存在较大误差,其动力学性能变化和组合转子尺寸之间存在一定的相关性。

Abstract

During the process of combined rotor modularization amplification or reduction,due to the size effect,the law of the influence of microcrack expansion on the dynamic performance of the combined rotor with different sizes is not clear.Dimensional analysis method of similarity theory was used to introduce the "size effect"existing in the process of microcrack expansion. And taking the prototype,2. 3-fold scale model and 1. 3-fold scale-up model of a heavy duty gas turbine combined rotor as the research objects,the combined rotor natural frequency drift were analyzed in the case of initial microcracks varying with combined rotor size. The results show that there is comparatively large deviation when using the ordinary Paris formula to analyze the natural frequency drift of the different size combined rotors caused by microcrack expansion. There is a certain correlation between the change of dynamic performance and the size of combined rotor considering microcracks.

关键词

组合转子相似理论微裂纹动力学性能系列化设计尺寸效应

Keywords

Combined rotorSimilarity theoryMicrocrackDynamic performanceSerial designSize effect

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