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硬涂层整体叶盘频率转向特性研究
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国家自然科学基金青年科学基金项目(12002219;11702178);辽宁省教育厅一般项目(LQ2019008;LQ2020015)


Study on Frequency Steering Characteristics of Hard Coated Blisk
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    摘要:

    硬涂层减振是一种极具应用前景的减振技术,被广泛应用于整体叶盘阻尼减振,研究旋转硬涂层整体叶盘频率转向特性具有重要意义。针对NiCoCrAlY+YSZ硬涂层整体叶盘减缩结构建立有限元模型,研究工作状态下硬涂层整体叶盘模态动频曲线两阶模态间频率转向和振型转换特性,和高阶模态间复杂的频率转向特性及硬涂层对整体叶盘频率转向和振型转换特性的影响。仿真结果表明:频率转向区附近转速n=600 rad/s时,无涂层整体叶盘第5阶和第6阶固有频率差值为15.14 Hz,硬涂层整体叶盘第5阶和第6阶固有频率差值为14.04 Hz,频率转向区附近固有频率变化率为7.26%;硬涂层的涂敷不会影响频率转向现象的发生,但改变了两阶模态间频率转向区动频曲线间隙,对频率转向区处模态振型无影响。

    Abstract:

    Hard coating vibration reduction is a promising vibration reduction technology,which is widely used in vibration reduction of integral bladed disk.It is of great significance to study the frequency steering characteristics of rotary hard coated blisk.The finite element model of NiCoCrAlY+YSZ hard coated blisk reduction structure was established.The characteristics of frequency steering and mode transformation between two modes of the dynamic frequency curve of hard coated blisk were studied.The complex frequency steering characteristics between high order modes and the influence of hard coating on the frequency steering and mode conversion characteristics of the whole bladed disk were studied.The simulation results show that when the speed n=600 rad/s near the frequency turning zone,the difference between the 5th and 6th natural frequencies of the uncoated blisk is 15.14 Hz,the difference between the 5th and 6th natural frequency of the hard-coated blisk is 14.04 Hz,and the natural frequency change rate near the frequency turning area is 7.26%; the coating of the hard coat will not affect the occurrence of the frequency steering phenomenon,but it changes the gap of the dynamic frequency curve in the frequency steering zone between the two modes,and has no effect on the mode shape in the frequency steering zone.

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杨铮鑫,郑伟,孙荣城,党鹏飞.硬涂层整体叶盘频率转向特性研究[J].机床与液压,2023,51(5):154-158.
YANG Zhengxin, ZHENG Wei, SUN Rongcheng, DANG Pengfei. Study on Frequency Steering Characteristics of Hard Coated Blisk[J]. Machine Tool & Hydraulics,2023,51(5):154-158

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  • 在线发布日期: 2023-04-07
  • 出版日期: 2023-03-15