Volume 37 Issue 1
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ZHAO Guang, WANG Yongquan, ZHAO Xiangyang, LI Shengxiang, TENG Guangrong. Modeling and application test of contact stiffness of bolt connection structure of disk and drum[J]. Journal of Aerospace Power, 2022, 37(1): 76-86. doi: 10.13224/j.cnki.jasp.20210065
Citation: ZHAO Guang, WANG Yongquan, ZHAO Xiangyang, LI Shengxiang, TENG Guangrong. Modeling and application test of contact stiffness of bolt connection structure of disk and drum[J]. Journal of Aerospace Power, 2022, 37(1): 76-86. doi: 10.13224/j.cnki.jasp.20210065
shu

Modeling and application test of contact stiffness of bolt connection structure of disk and drum

doi: 10.13224/j.cnki.jasp.20210065
  • 1.

    School of Energy and Power Engineering， Dalian University of Technology，Dalian Liaoning 116024，China

  • 2.

    Sichuan Gas Turbine Establishment， Aero Engine Corporation of China，Mianyang Sichuan 621000，China

  • Received Date: 2021-02-09
  • Publish Date: 2022-01-28
    Abstract
  • In view of the problem of precise modeling and engineering application of the connection stiffness of the bolt connection structure of the aero-engine disk and drum rotor,the relationship between the first six natural frequencies and the bolt preload was obtained through the inherent characteristics test of the bolt structure of the sectorial disk and drum.Considering the stress distribution on the contact surface of the bolts,the variation of natural frequencies of the bolted structure of the sectorial disk and drum with the elastic modulus of the thin-layer element was obtained based on the double-thin-layer element method.The identification of the contact stiffness was realized by constructing the error function of the test and simulation results,and the contact stiffness model was applied to the bolt connection structure of the whole circle drum,which verified the validity and universatility of the model.The results showed that the contact stiffness model established based on the natural frequency test and simulation of sectorial disk and drum structure connected by single bolt had an average identification error of 2.40%.In the bolted structure of the full disk and drum rotor,the average error between simulation and test was 4.10%,which verified the universality of the proposed contact stiffness model.

     

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