Supporting Data and Code for "The Influence of Rotor-Stator Contact on the Nonlinear Vibration of an Asymmetrical Rotor"

This dataset includes all supporting files for the manuscript "The Influence of Rotor-Stator Contact on the Nonlinear Vibration of an Asymmetrical Rotor". The study investigates the complex nonlinear dynamics of a rotating, asymmetric shaft under rotor-stator contact using a combination of analytical modeling and numerical simulation.The repository is organized to reflect the structure of the manuscript, with folders corresponding to its main subsections:📁 1. Analytic verificationRelated to Subsection 4.1 — VerificationIncludes symmetric and asymmetric case studies using both analytical (Maple) and numerical (MATLAB) methods. Also contains:Figures comparing analytical and numerical solutionsScripts for bifurcation diagrams and parameter studiesError analysis routines📁 2. Rotational speedRelated to Subsection 4.2 — The effect of the rotating speedContains MATLAB code and result files for bifurcation and Lyapunov exponent analysis over varying rotational speeds.📁 3. Asymmetricity effectRelated to Subsection 4.3 — The effect of asymmetricityIncludes two parts:Non-impact figure analysis: Influence of asymmetric inertia and stiffness in the absence of contact.Bifurcation and Lyapunov analysis: Behavior under contact with increasing asymmetry.📁 4. Contact stiffnessRelated to Subsection 4.4 — The effect of impact stiffnessProvides scripts and plots for studying dynamic transitions under varying contact stiffness levels, including chaotic regimes and bifurcation diagrams.📁 5. Damping coefficientRelated to Subsection 4.5 — The effect of damping coefficientDemonstrates how damping influences transitions between periodic, quasi-periodic, and chaotic motions, with bifurcation and Lyapunov plots.📁 6. Slenderness ratioAdditional Parametric Study (Appendix C)Analyzes the effect of slenderness ratio on rotor dynamics in the absence of contact. Includes comparisons for different geometries (e.g., cross-section ratios).📁 7. Position of DiskAdditional Parametric Study (Appendix C)Explores how the location of the added disk along the shaft affects dynamic response characteristics.Usage Notes:Scripts are primarily written in MATLAB (R2020a or newer recommended).Analytical models are implemented in Maple (.mw files)..fig files can be viewed in MATLAB's Figure Viewer for further inspection or editing.Citation:If you use this dataset or code, please cite the corresponding paper:Fasihi, A., Shahgholi, M., Kudra, G., Ghandchi Tehrani, M., & Awrejcewicz, J.The Influence of Rotor-Stator Contact on the Nonlinear Vibration of an Asymmetrical Rotor, Nonlinear Dynamics, 2025.Contact:Ali Fasihi — [e-mail]

本数据集包含论文《转子-定子接触对不对称转子非线性振动的影响》(The Influence of Rotor-Stator Contact on the Nonlinear Vibration of an Asymmetrical Rotor)的全部支撑文件。本研究结合解析建模与数值模拟方法，探究了存在转子-定子接触时不对称旋转轴的复杂非线性动力学特性。
本数据集仓库按照论文的结构进行组织，各文件夹对应论文的主要子章节：
📁 1. 解析验证（Analytic verification）
对应论文第4.1小节——验证工作
涵盖采用解析方法与数值方法完成的对称与非对称案例研究，同时包含：解析解与数值解对比图、分岔图(bifurcation diagram)与参数研究脚本、误差分析程序
📁 2. 旋转转速（Rotational speed）
对应论文第4.2小节——旋转转速的影响
包含用于不同旋转转速下分岔分析与李雅普诺夫指数(Lyapunov exponent)分析的MATLAB代码与结果文件。
📁 3. 不对称性影响（Asymmetricity effect）
对应论文第4.3小节——不对称性的影响
包含两部分内容：
无接触工况分析：无接触条件下不对称惯性与刚度的影响。
分岔与李雅普诺夫分析：接触工况下不对称性递增时的动力学行为。
📁 4. 接触刚度（Contact stiffness）
对应论文第4.4小节——碰撞刚度的影响
提供用于研究不同接触刚度水平下动力学转变的脚本与绘图结果，包括混沌区域与分岔图。
📁 5. 阻尼系数（Damping coefficient）
对应论文第4.5小节——阻尼系数的影响
展示了阻尼如何影响周期、准周期(quasi-periodic)与混沌运动间的转变，附带分岔图与李雅普诺夫指数绘图结果。
📁 6. 长细比（Slenderness ratio）
附加参数研究（附录C）
分析了无接触工况下长细比对转子动力学特性的影响，包含不同几何参数（如截面比率）的对比结果。
📁 7. 圆盘位置（Position of Disk）
附加参数研究（附录C）
探究了附加圆盘沿轴的位置对动力学响应特性的影响。
使用说明：
本数据集的脚本主要采用MATLAB编写，推荐使用R2020a及更新版本。
解析模型采用Maple实现（文件扩展名为.mw）。
.fig格式文件可通过MATLAB图形查看器进行查看、进一步检视或编辑。
引用要求：
若您使用本数据集或代码，请引用对应论文：
Fasihi, A., Shahgholi, M., Kudra, G., Ghandchi Tehrani, M., & Awrejcewicz, J.
《不对称转子-定子接触对非线性振动的影响》，Nonlinear Dynamics，2025。
联系方式：
Ali Fasihi — [e-mail]