基于硬涂层的主动失谐整体叶盘建模与分析

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摘要通过在整体叶盘各扇区叶片上涂敷不同厚度的硬涂层可以将主动失谐减振与硬涂层阻尼减振技术简单而有效地应用于整体叶盘。为了探究该方法的减振特性，首先给出了由单个失谐扇区的结构矩阵组集成完整主动失谐叶盘结构矩阵的方法，并利用泰勒展开和最小二乘法建立了叶片上的涂层厚度与对应涂层引起的叶片失谐矩阵这两者的近似关系。在此基础上，利用公称模态子集法对失谐叶盘结构进行减缩建模。接着，通过与完整有限元的计算结果对比验证了所提出的近似关系与减缩模型的正确性。最后，利用该减缩模型和蒙特卡罗模拟分析了行波激励下基于硬涂层的主动失谐叶盘振动特性。研究表明：叶盘基体随机失谐下，该方法可以明显降低整体叶盘的响应水平。

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关键词 ：硬涂层, 主动失谐, 整体叶盘, 建模与分析

Abstract：An approach adopting the active detuning vibration reduction technique and hard coating one can be simply and effectively applied in a blisk through depositing hard coatings with different thicknesses on blades of the blisk’s different sectors.Here, to study vibration reduction characteristics of this approach, firstly, the method to assemble the overall structure matrix of a whole active detuning blisk with structure matrix of its each single detuning sector was presented.Taylor expansion and the least square method were used to construct the approximate relationship between blade coating thickness and the corresponding blade detuning matrix caused by coating.Then, the nominal mode subset method was applied to construct the reduced order model of the blisk.Furthermore, the correctness of the proposed approximate relationship and the blisk’s reduced order model was verified through comparing calculation results using the approximate relationship and the reduced order model with those using the finite element method.Finally, this reduced order model and Monte Carlo method were used to simulate and analyze vibration characteristics of an active detuning blisk subjected to traveling wave excitation.The results showed that this approach can be used to significantly reduce the vibration response level of this blisk under its matrix’s random detuning.

Key words： Hard coating Intentional mistuning Blisk Modeling and analysis

收稿日期: 2018-03-19 出版日期: 2019-08-28

引用本文:

高俊男1,2，孙伟?1,2. 基于硬涂层的主动失谐整体叶盘建模与分析[J]. 振动与冲击, 2019, 38(17): 65-72.
GAO Junnan1,2,SUN Wei1,2. Modeling and analysis for an active detuning blisk based on hard coating. JOURNAL OF VIBRATION AND SHOCK, 2019, 38(17): 65-72.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2019/V38/I17/65

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