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周期性碰摩激励作用下薄壁机匣支撑系统响应机理

韩金昌 左彦飞 冯坤

韩金昌, 左彦飞, 冯坤. 周期性碰摩激励作用下薄壁机匣支撑系统响应机理[J]. 航空动力学报, 2021, 36(1): 167-175. doi: 10.13224/j.cnki.jasp.2021.01.019
引用本文: 韩金昌, 左彦飞, 冯坤. 周期性碰摩激励作用下薄壁机匣支撑系统响应机理[J]. 航空动力学报, 2021, 36(1): 167-175. doi: 10.13224/j.cnki.jasp.2021.01.019
HAN Jinchang, ZUO Yanfei, FENG Kun. Response mechanism of thin-walled casing support system under periodic rubbing exciation[J]. Journal of Aerospace Power, 2021, 36(1): 167-175. doi: 10.13224/j.cnki.jasp.2021.01.019
Citation: HAN Jinchang, ZUO Yanfei, FENG Kun. Response mechanism of thin-walled casing support system under periodic rubbing exciation[J]. Journal of Aerospace Power, 2021, 36(1): 167-175. doi: 10.13224/j.cnki.jasp.2021.01.019

周期性碰摩激励作用下薄壁机匣支撑系统响应机理

doi: 10.13224/j.cnki.jasp.2021.01.019
基金项目: 国家自然科学基金青年科学基金(51905025); 中央高校基本科研业务费专项资金(JD1911)

Response mechanism of thin-walled casing support system under periodic rubbing exciation

  • 摘要: 针对发动机薄壁机匣支撑系统在碰摩激励作用下动力学响应复杂,基于机匣振动信号的碰摩故障特征识别难度大的问题,提出了一种用于故障特征机理分析的数值仿真方法。通过建立薄壁机匣系统的等效动力学三维实体模型,将碰摩激励进行等效力学简化,利用瞬态动力学方法对周期性碰摩故障进行了数值仿真。在系统固有特性分析的基础上,对机匣测点在碰摩激励作用下的时域、频域响应特征展开研究,得到了碰摩故障特征的产生机理。机匣位移振动信号主导频率为系统整体低阶固有频率,加速度振动信号主导频率为碰摩脉冲激励频率及其倍频,上述结论可作为碰摩故障发生的依据,为故障早期诊断提供参考。

     

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出版历程
  • 收稿日期:  2020-06-17
  • 刊出日期:  2021-01-28

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