基于ANSYS-Workbench的转子模态分析  

Modal Analysis of Rotor Based on ANSYS-Workbench

作　　者：王林军[1] 曹慧萍[1] 

机构地区：[1]三峡大学机械与动力学院,湖北宜昌443002

出　　处：《三峡大学学报（自然科学版）》2014年第6期89-93,共5页Journal of China Three Gorges University：Natural Sciences

基　　金：国家自然科学基金(11202116);三峡大学人才科研启动基金(KJ2011B033)

摘　　要：工程中的各种高速转子都需要确定其固有频率,以保证其在安全的转速范围内工作,不发生共振.与传统的传递矩阵法相比,有限元法并不是对各个轴段的截面状态向量进行逐段推算,直到计算到转轴的另一端,而是将连续系统离散化以变分原理为基础形成的一种数值近似解法.本文利用Solidworks软件建立了转子结构的实体模型,并采用ANSYS-Workbench有限元软件对设计的转子结构进行了常规的和有预应力的模态分析,得到了转子系统的各阶固有频率和对应的振型分析,为避免发生共振和后续的结构改进和优化提供了有效的理论依据.It is necessary to determine the natural frequencies of many kinds of high-speed rotors in engineer- ing, in order to assure that they work without resonance in the safety speed range. Unlike the traditional transfer matrix method, the finite element method （FEM） is not to compute the state vector of each shaft sec- tion step by step until the other end of the shaft, but a numerical approximation solution method which is based on the discretization of continuous system and the variational principle. The authors establish the entity model of rotor structure by the software called Solidworks, and then obtain the corresponding natural fre- quency of rotor system and vibration mode analysis using the modal analysis of rotor structure by the finite element software ANSYS-Workbench, so as to provide the theoretical basis for effectively avoiding the reso- nance and subsequent improvement and optimization of rotor structure.

关 键 词：有限元法 ANSYS—Workbench 转子 模态分析 

分 类 号：TH113.2[机械工程—机械设计及理论]