A rough surface contact analysis method based on fractal and statistical summation
By constructing a rough surface contact analysis method based on fractals and statistical summation, the problem that existing models cannot accurately characterize the rough surface characteristics of bolted flat plate structures after turning is solved, and high-precision contact mechanical response prediction is achieved, supporting structural optimization design and reliability assessment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- NAVAL UNIV OF ENG PLA
- Filing Date
- 2026-02-03
- Publication Date
- 2026-06-09
AI Technical Summary
Existing contact models are unable to accurately reflect the non-Gaussian distribution, anisotropy, and multi-scale fractal characteristics of the rough surface of bolted flat structures after turning, resulting in insufficient accuracy in predicting contact mechanical response and an inability to fully characterize key parameters such as contact load and contact area.
A horizontal fractal model is constructed using the power spectral density method, and a composite geometric constitutive model is combined with the vertical Lorentz model. This model, along with the ZMC micro-convexity elastoplastic model, is used to construct a rough surface contact analysis method, which comprehensively characterizes multi-scale fractal properties and non-Gaussian distribution.
It significantly improves the prediction accuracy of contact mechanical response, and controls the prediction errors of normal mechanical response, contact load and contact area within a low range, providing solid theoretical support for the optimized design and reliability assessment of bolted connection structures.
Smart Images
Figure CN122174436A_ABST