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April 25, 2026ZAMM ‐ Journal of Applied Mathematics and Mechanics / Zeitschrift für Angewandte Mathematik und Mechanik

Dynamic Characteristic Analysis of Long‐Shaft Dual‐Rotor System Considering Unbalance Excitation and Crack Fault

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Authors

ZJZhengji JiangZXZhengming XiaoZLZeming Lian

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Overview

Randomized trial examines vibration characteristics in long-shaft dual-rotor systems, suggesting methods for improved stability and fault diagnosis.

Key Points

  • This research aims to analyze the dynamic characteristics of long-shaft dual-rotor systems influenced by unbalance excitation and crack faults.
  • Developed a finite element method-based dynamic model for accuracy verification.
  • Analyzed unbalanced response characteristics using Newmark-HHT method and time-frequency analysis.
  • Investigated the effects of speed ratio, unbalance magnitude, and bearing stiffness systematically.
  • Increased speed ratio and unbalance led to elevated vibration amplitudes.
  • Optimized matching of support bearing stiffness suppressed vibrational responses significantly.
  • Deeper cracks intensified dual-frequency resonance, and multiple cracks caused significant axis trajectory distortions.

Cite This Study

Jiang et al. (2026) studied this question.

synapsesocial.com/papers/69ec5b8a88ba6daa22dad101https://doi.org/10.1002/zamm.70430
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