安徽工程大毕业设计论文.doc

基于ANSYS的非圆斜齿轮啮合热特性分析 摘 要 本课题是设计型课题，设计的主要内容是基于ANSYS非圆斜齿轮啮合热特性分析。针对非圆斜齿轮特征及相关参数，在UG软件中准确建立三维模型，并将建立的模型导入ANSYS分析软件中分析研究其啮合的热力学特征.传动齿轮在工作过程中受到周期性载荷力的作用，有可能在标定转速内发生强烈的共振，动应力急剧增加，致使齿轮过早出现扭转疲劳和弯曲疲劳。运用有限元分析软件ANSYS对齿轮齿根应力和齿轮接触进行分析计算,得出两个大小齿轮的接触温度分布云图。计算结果准确直观，为非圆斜齿轮接触热分析和强度校核提供了快速有效的方法。在应用大型有限元ANSYS分析软件时，重点关注齿轮啮合出受载变形，重合度变化，传动比变化。本文介绍了ANSYS接触分析方法，对其中遇到的接触问题进行探讨，对在计算过程中可能影响收敛的因素：处理界面约束的方法、摩擦模型、接触强度、初始接触条件的选择和模拟提出建议，通过算例说明了有限元分析在齿轮接触问题上的有效性。为其他类型接触问题的分析提供了参考。 关键词：非圆斜齿轮；ANSYS；有限元分析；接触对；热特性 Heat Analysis of Non-Circular Helical Gear Teeth Based on ANSYS Abstract This topic is type design topic, the design of the main content is based on ANSYS non-circular gear meshing thermal characteristic analysis inclined. According to the characteristics of the helical gear round and related parameters, in UG software to establish correct 3 d model, and will build the model into ANSYS analysis software analysis to study the characteristics of the meshing thermodynamics. Driving gear in the process of work by periodic load of forces, may have occurred within the strong calibration speed resonance, dynamic stress increase sharply, cause premature fatigue and reverse gear bending fatigue. By using the finite element analysis software ANSYS gear tooth root stress and gear contact analysis calculated, two size of gear contact temperature distribution in the cloud. The calculated results are accurate, intuitive, and for the round the helical gear contact thermal analysis and strength check provides a rapid and effective method. In the application of finite element analysis software ANSYS large, focus on the gear engagement by the deformation, change the coincidence degree, transmission ratio change. This paper introduces the analysis method of ANSYS contact, and on one of them to meet the contact, the article discusses the calculation process of may affect the convergence of factors: deal with the method of interface restriction, friction model, the contact strength, initial contact co