裂纹方向对齿轮动力特性及动态应力影响的研究  

Study of impact of crack direction on dynamic characteristic and dynamic stress of gears

作　　者：马杰[1] 邵忍平[1] 

机构地区：[1]西北工业大学机电学院,西安710072

出　　处：《机械设计与制造》2011年第10期215-217,共3页Machinery Design & Manufacture

基　　金：国家自然科学基金(50575187);航空科学基金(01I53073);陕西省自然科学基金(2004E219);西北工业大学研究生创业种子基金资助项目(Z2010024)

摘　　要：利用参数化方程在PROE中建立了不同裂纹起始角度的裂纹齿轮模型,并分析了不同裂纹起始角度对齿轮结构固有频率和振型的影响。在此基础上,利用ANSYS软件对含有不同裂纹起始角度的齿轮进行了应力分析,并对其轮齿应力场进行了比较研究。结果表明:齿根发生裂纹时不同裂纹角度对齿轮低阶固有频率影响较小,而对高阶固有频率影响较大。分度圆发生裂纹时不同裂纹角度对齿轮固有频率影响不是很明显。同等裂纹深度下,随着裂纹角度的增加,齿根处应力明显增加。这说明当轮齿出现裂纹时,如果裂纹角度比较大,则轮齿更容易破坏。这为裂纹齿轮的强度计算和工作性能分析提供了依据。By applying parametric equations,the cracked gear model with different crack starting angle is established in PRO/E.And then the impact of different crack starting angle upon the natural frequency and the mode of vibration of a spur gear is analyzed.On this basis,stress of a spur gear with different crack starting angle is simulated with ANSYS software,and the comparative study on stress field of a spur gear is carried out.The result shows that,the different crack starting angle has little effect upon the low order natural frequency when root crack occurs;However,the impact may be huge for high order natural frequency.The impact of different crack starting angle on the low order natural frequency is not obvious when pitch circle crack occurs.While under same crack depth,the stress of tooth root increases obviously with the increase of crack starting angle,which shows that gear tooth is easier to destroy with the increase of the crack starting angle when crack occurs,which provide a basis for gear strength calculation and analysis of working performance.

关 键 词：齿轮 裂纹起始角度 固有频率 振型 应力场 

分 类 号：TH113.1[机械工程—机械设计及理论]