Author(s)

XingChen Wang

Affiliation(s)

School of Mechanical Engineering, Xi’an Jiaotong University, Xi’an 710000, Shaanxi, China.

Corresponding Author

XingChen Wang

ABSTRACT

This study establishes a finite element model of a 6205 rolling bearing system, incorporating the housing and central shaft, to analyze dynamic characteristics under healthy and composite fault conditions. The model's reliability is validated through close agreement between simulated and theoretical kinematic values and fault characteristic frequencies. Analysis reveals that stress concentrates at the leading edge of defects due to rolling element impact. The ball-inner ring composite fault induces the highest shear stress levels and severe fluctuations, resulting from intense interaction between moving and core load-bearing surface defects. In contrast, fixed outer ring defects cause periodic, moderate stress responses. Acceleration response analysis shows that ball-outer ring faults produce higher-amplitude, sustained vibrations due to near-rigid impacts, while ball-inner ring faults generate intermittent spikes buffered by the inner ring's inertia. These distinct signatures provide a theoretical basis for differentiating fault types in vibration signals. The findings offer accurate fault characteristics and simulation data support for vibration-based condition monitoring and early diagnosis of rolling bearings.

KEYWORDS

Rolling bearing; Composite fault; Finite Element Analysis; Dynamic response; LS-DYNA

CITE THIS PAPER

XingChen Wang. Dynamic response and coupling mechanism for composite faults in bearing-bearing seat system based on LS-DYNA. World Journal of Engineering Research. 2025, 3(5): 23-35. DOI: https://doi.org/10.61784/wjer3057.

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