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Purpose <p>Investigate the influence law of tooth surface micromorphology on time-varying meshing stiffness and fault gear&#xa0;dynamics.</p> Methods <p>The paper takes a spalling fault gear as the subject. Firstly, considering the impact of tooth surface micromorphology,&#xa0;the tooth surface is characterized using fractal theory. A unique mapping relationship between tooth surface&#xa0;roughness and profile height is established. Next, based on the relative positions of the root circle and the base&#xa0;circle, as well as changes in the rough tooth surface profile height, an improved time-varying mesh stiffness model&#xa0;for spalling gears is established. A nonlinear dynamic model of gears that couples time-varying meshing stiffness&#xa0;with time-varying tooth side clearance is constructed.</p> Results <p>The experimental results show that considering the micromorphology of the tooth surface can simulate the time-varying&#xa0;meshing stiffness of gears more accurately and is more in line with the actual gear dynamics response law.</p> Conclusion <p>In this study, the relationship between tooth surface micromorphology and time-varying meshing stiffness as well as&#xa0;time-varying backlash was focused on. The influence law of tooth surface micromorphology on the dynamic model&#xa0;was revealed by using the gear dynamic response, and the rationality of establishing the dynamic model considering&#xa0;the tooth surface micromorphology was confirmed.</p>

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Research on the Contact Dynamic Characteristics of Gears Coupled with Tooth Surface Micromorphology and Spalling Faults

  • 期刊论文

  • 发表日期：

    2025年5月23日

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  • Shengli Wu,
  • Yi Zhou,
  • Wenting Xing,
  • Ying Liu

摘要

Purpose

Investigate the influence law of tooth surface micromorphology on time-varying meshing stiffness and fault gear dynamics.

Methods

The paper takes a spalling fault gear as the subject. Firstly, considering the impact of tooth surface micromorphology, the tooth surface is characterized using fractal theory. A unique mapping relationship between tooth surface roughness and profile height is established. Next, based on the relative positions of the root circle and the base circle, as well as changes in the rough tooth surface profile height, an improved time-varying mesh stiffness model for spalling gears is established. A nonlinear dynamic model of gears that couples time-varying meshing stiffness with time-varying tooth side clearance is constructed.

Results

The experimental results show that considering the micromorphology of the tooth surface can simulate the time-varying meshing stiffness of gears more accurately and is more in line with the actual gear dynamics response law.

Conclusion

In this study, the relationship between tooth surface micromorphology and time-varying meshing stiffness as well as time-varying backlash was focused on. The influence law of tooth surface micromorphology on the dynamic model was revealed by using the gear dynamic response, and the rationality of establishing the dynamic model considering the tooth surface micromorphology was confirmed.