中南大学学报（自然科学版）2025，Vol.56Issue(3)：923-931,9.DOI:10.11817/j.issn.1672-7207.2025.03.010
盘-鼓-轴耦合结构振动的有限元模型及实验验证
Finite element model and experimental verification of vibration of disk-drum-shaft coupling structure
摘要
Abstract
Disk-drum-shaft coupled structure,as a core component of an aircraft engine,has its vibration characteristics significantly affecting engine's performance.Firstly,based on the first-order shear deformation theory,finite element general expressions for stiffness and mass matrices applicable to disk,drum and shaft structures were derived.Secondly,in order to accurately simulate the coupling effect and the boundary conditions of the whole structure,an eight-degree-of-freedom spring element was constructed.Thirdly,stiffness and mass matrices of disk,drum and shaft structures were assembled in sequence with spring element matrices at each location to form total stiffness matrix and total mass matrix of disk-drum-shaft coupled structure,thereby establishing mechanical model of coupled structure.Finally,simulation results of finite element model were compared with experimental test results,and the effectiveness of the modeling method was verified.The results show that maximum relative error between finite element model and first 7 natural frequencies is 2.854%,the minimum relative error is 0.408%,and the average relative error is 1.581%.Simulation mode of finite element model is in good agreement with experimental mode,which verifies the validity of modeling method proposed in this paper.关键词
一阶剪切理论/盘-鼓-轴耦合结构/有限元法/固有特性/模态测试Key words
first order shear theory/disk-drum-shaft coupling structure/finite element method/nature characteristic/modal testing引用本文复制引用
张宏生,徐昆鹏,孙伟,刘晓峰..盘-鼓-轴耦合结构振动的有限元模型及实验验证[J].中南大学学报（自然科学版）,2025,56(3):923-931,9.基金项目
国家科技重大专项资助项目(J2022-IV-0005-0022)(Project(J2022-IV-0005-0022)supported by the National Science and Technology Major Project) （J2022-IV-0005-0022）
