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<p>Time-varying tooth flank loaded contact pressure provides significant access to load capability, contact strength, and fatigue life forecasting for face-hobbed spiral bevel gears. Considering the reliability and time-varying meshing characteristics, an innovative assessment and identification model is developed using the discrete convolution and fast Fourier transformation (DC-FFT)-based conjugate gradient method (CGM). The reliability assessment mainly includes the edge impact, time-varying meshing characteristics, and the maximum loaded contact pressure, in addition to conventional assessment items. Firstly, an advanced face-hobbed cutting process involving a continuous indexing method is simulated for tooth flank modeling. Subsequently, contact initialization, time-varying edge contact solution, and numerical loaded tooth contact analysis (NLTCA) approximation and operation are developed for the loaded contact pressure reliability analysis and assessment. In particular, the time-varying edge impact provides an accurate parametric computation for reliability and assessment. Moreover, a DC-FFT-based CGM is used to establish time-varying loaded flank identification considering reliability assessment. Finally, a spiral bevel gear set from a helicopter transmission system is used to verify the impact of the proposed model on the loaded flank pressure distribution.</p>

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Reliability assessment and identification model of time-varying tooth flank loaded contact pressure for face-hobbed spiral bevel gears

  • 期刊论文

  • 发表日期：

    2026年7月20日

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  • Han Ding,
  • Xu-Yang Wang,
  • Hao-Tian Ji,
  • Yan Yang,
  • Jun Ding,
  • Mou Li,
  • Zhen-Yu Zhou,
  • Xuan Tao

摘要

Time-varying tooth flank loaded contact pressure provides significant access to load capability, contact strength, and fatigue life forecasting for face-hobbed spiral bevel gears. Considering the reliability and time-varying meshing characteristics, an innovative assessment and identification model is developed using the discrete convolution and fast Fourier transformation (DC-FFT)-based conjugate gradient method (CGM). The reliability assessment mainly includes the edge impact, time-varying meshing characteristics, and the maximum loaded contact pressure, in addition to conventional assessment items. Firstly, an advanced face-hobbed cutting process involving a continuous indexing method is simulated for tooth flank modeling. Subsequently, contact initialization, time-varying edge contact solution, and numerical loaded tooth contact analysis (NLTCA) approximation and operation are developed for the loaded contact pressure reliability analysis and assessment. In particular, the time-varying edge impact provides an accurate parametric computation for reliability and assessment. Moreover, a DC-FFT-based CGM is used to establish time-varying loaded flank identification considering reliability assessment. Finally, a spiral bevel gear set from a helicopter transmission system is used to verify the impact of the proposed model on the loaded flank pressure distribution.