Dynamic modeling of the rotor system with bolted joints considering microscopic contact and nonuniform preloads

Penghao Zhao; Jianhua Liu; Hao Gong; Zhengyue Tan; Zhongtian Lu

doi:10.1016/j.apm.2025.116731

Dynamic modeling of the rotor system with bolted joints considering microscopic contact and nonuniform preloads

Penghao Zhao
, Jianhua Liu
, Hao Gong^*
, Zhengyue Tan
, Zhongtian Lu

^*此作品的通讯作者

机械与车辆学院

Beijing Institute of Technology
AECC Shenyang Engine Research Institute

科研成果: 期刊稿件 › 文章 › 同行评审

1 引用（Scopus）

摘要

The intense vibration of rotor system assembled with bolted joints in high rotational speed brings a potential harm to aero-engine. However, the microscopic contact between disks, coupled with nonuniform preloads, introduces complex nonlinear properties to the rotor system, complicating vibration analysis. This study develops a novel dynamic model of rotor system with bolted joints, considering microscopic contact and nonuniform preloads. Specifically, sub-regions are divided based on pressure distribution under nonuniform preloads, and a multi-scale contact model is deduced based on the fractal theory and semi-analytical method. Subsequently, the lateral and bending stiffness models of bolted-joint disk are refined to incorporate nonuniform preload effects. After solving the motion equations, time/frequency-domain analyses are conducted to reveal the influence of nonuniform preloads and surface roughness on the vibration responses. Through numerical simulation, a comparative analysis is conducted with the traditional dynamic model without microscopic contact and nonuniform preloads. Finally, a bolted-joint rotor test rig is designed to verify the simulation results, and the vibration characteristics under rub-impact faults are analyzed numerically and experimentally.

源语言	英语
期刊论文编号	116731
期刊	Applied Mathematical Modelling
卷	155
DOI	https://doi.org/10.1016/j.apm.2025.116731
出版状态	已出版 - 7月 2026

访问文件

10.1016/j.apm.2025.116731

其它文件与链接

链接到 Scopus 的出版物

引用此

@article{3ee710cd8af34bc0b9e11bb3adedb013,

title = "Dynamic modeling of the rotor system with bolted joints considering microscopic contact and nonuniform preloads",

abstract = "The intense vibration of rotor system assembled with bolted joints in high rotational speed brings a potential harm to aero-engine. However, the microscopic contact between disks, coupled with nonuniform preloads, introduces complex nonlinear properties to the rotor system, complicating vibration analysis. This study develops a novel dynamic model of rotor system with bolted joints, considering microscopic contact and nonuniform preloads. Specifically, sub-regions are divided based on pressure distribution under nonuniform preloads, and a multi-scale contact model is deduced based on the fractal theory and semi-analytical method. Subsequently, the lateral and bending stiffness models of bolted-joint disk are refined to incorporate nonuniform preload effects. After solving the motion equations, time/frequency-domain analyses are conducted to reveal the influence of nonuniform preloads and surface roughness on the vibration responses. Through numerical simulation, a comparative analysis is conducted with the traditional dynamic model without microscopic contact and nonuniform preloads. Finally, a bolted-joint rotor test rig is designed to verify the simulation results, and the vibration characteristics under rub-impact faults are analyzed numerically and experimentally.",

keywords = "Bolted-joint disk, Multi-scale contact, Nonuniform preloads, Rotor system",

author = "Penghao Zhao and Jianhua Liu and Hao Gong and Zhengyue Tan and Zhongtian Lu",

note = "Publisher Copyright: {\textcopyright} 2025 Elsevier Inc.",

year = "2026",

month = jul,

doi = "10.1016/j.apm.2025.116731",

language = "English",

volume = "155",

journal = "Applied Mathematical Modelling",

issn = "0307-904X",

publisher = "Elsevier Inc.",

}

TY - JOUR

T1 - Dynamic modeling of the rotor system with bolted joints considering microscopic contact and nonuniform preloads

AU - Zhao, Penghao

AU - Liu, Jianhua

AU - Gong, Hao

AU - Tan, Zhengyue

AU - Lu, Zhongtian

PY - 2026/7

Y1 - 2026/7

N2 - The intense vibration of rotor system assembled with bolted joints in high rotational speed brings a potential harm to aero-engine. However, the microscopic contact between disks, coupled with nonuniform preloads, introduces complex nonlinear properties to the rotor system, complicating vibration analysis. This study develops a novel dynamic model of rotor system with bolted joints, considering microscopic contact and nonuniform preloads. Specifically, sub-regions are divided based on pressure distribution under nonuniform preloads, and a multi-scale contact model is deduced based on the fractal theory and semi-analytical method. Subsequently, the lateral and bending stiffness models of bolted-joint disk are refined to incorporate nonuniform preload effects. After solving the motion equations, time/frequency-domain analyses are conducted to reveal the influence of nonuniform preloads and surface roughness on the vibration responses. Through numerical simulation, a comparative analysis is conducted with the traditional dynamic model without microscopic contact and nonuniform preloads. Finally, a bolted-joint rotor test rig is designed to verify the simulation results, and the vibration characteristics under rub-impact faults are analyzed numerically and experimentally.

AB - The intense vibration of rotor system assembled with bolted joints in high rotational speed brings a potential harm to aero-engine. However, the microscopic contact between disks, coupled with nonuniform preloads, introduces complex nonlinear properties to the rotor system, complicating vibration analysis. This study develops a novel dynamic model of rotor system with bolted joints, considering microscopic contact and nonuniform preloads. Specifically, sub-regions are divided based on pressure distribution under nonuniform preloads, and a multi-scale contact model is deduced based on the fractal theory and semi-analytical method. Subsequently, the lateral and bending stiffness models of bolted-joint disk are refined to incorporate nonuniform preload effects. After solving the motion equations, time/frequency-domain analyses are conducted to reveal the influence of nonuniform preloads and surface roughness on the vibration responses. Through numerical simulation, a comparative analysis is conducted with the traditional dynamic model without microscopic contact and nonuniform preloads. Finally, a bolted-joint rotor test rig is designed to verify the simulation results, and the vibration characteristics under rub-impact faults are analyzed numerically and experimentally.

KW - Bolted-joint disk

KW - Multi-scale contact

KW - Nonuniform preloads

KW - Rotor system

UR - https://www.scopus.com/pages/publications/105027260106

U2 - 10.1016/j.apm.2025.116731

DO - 10.1016/j.apm.2025.116731

M3 - Article

AN - SCOPUS:105027260106

SN - 0307-904X

VL - 155

JO - Applied Mathematical Modelling

JF - Applied Mathematical Modelling

M1 - 116731

ER -

Dynamic modeling of the rotor system with bolted joints considering microscopic contact and nonuniform preloads

摘要

访问文件

其它文件与链接

学术指纹

引用此