不同裂纹故障下锥齿轮行波共振瞬态动力学特性研究  

作　　者：王添翼 栾孝驰 马胤章 高宇涵 徐石 

机构地区：[1]沈阳航空航天大学创新创业学院,辽宁沈阳110136 [2]沈阳航空航天大学航空发动机学院,辽宁沈阳110136

出　　处：《科技创新与应用》2021年第36期31-34,共4页Technology Innovation and Application

基　　金：辽宁省教育厅系列项目(编号:JYT2020010);辽宁省大学生创新创业训练计划资助(编号:S202010143025)。

摘　　要：基于FEM和Hertz接触理论对锥齿轮进行动力学特性分析,重点研究了行波共振状态下锥齿轮瞬态动力学特性,探究了不同尺寸齿根裂纹故障对齿轮固有频率特性的影响,分析了健康齿轮和含齿根裂纹齿轮的整体应力分布以及齿根处应力变化。分析结果表明:随着齿轮节径数增加或齿根裂纹尺寸增大,健康齿轮和故障齿轮的固有频率的差异越大。当齿轮发生3节径前行波共振时,含齿根裂纹故障齿轮齿根裂纹处应力显著增加,故障齿轮齿根处应力值是健康齿轮的5.8倍,这种现象将导致齿根裂纹的进一步扩展,对齿轮寿命和可靠性造成较大影响。Based on the finite element method(FEM)and Hertz contact theory,the dynamic characteristics of aero-engine central bevel gears are analyzed in this paper.The focus is on the transient dynamic characteristics of bevel gears under traveling wave resonance.The influence of different sizes of root crack faults on the natural frequency characteristics of the gear is explored.The overall stress distribution and stress change at the root of the healthy gear and the gear with root crack are analyzed.The results show that with the increase of gear pitch diameter or tooth root crack size,the difference of natural frequency between healthy gear and fault gear is bigger.When the three-path forward wave resonance occurs in the gear,the stress at the tooth root crack of the gear with tooth root crack increases significantly,and the stress value at the tooth root of the fault gear is 5.8 times that of the healthy gear.This phenomenon will lead to the further expansion of the tooth root crack,which has a great effect on the lifespan and reliability of the gear.

关 键 词：齿根裂纹故障 锥齿轮 行波共振 瞬态动力学特性 

分 类 号：V232.8[航空宇航科学与技术—航空宇航推进理论与工程]