【作者】 吴金富；

【导师】 许雪峰；

【作者基本信息】 浙江工业大学 ， 机械制造及其自动化， 2004， 硕士

【摘要】 感应加热利用工件中涡流的焦耳效应将工件加热，该方法具有效率高、控制精确、污染少等特点，在工业生产中得到了广泛的应用。然而基于试验的传统设计方法却耗时费力，并且成本高，因此，数值模拟技术在感应加热中的应用具有重要意义。本文根据感应加热原理特点，研究并实现了感应加热过程的数值模拟计算，全文内容分为七章： 第一章：简述了感应加热技术的发展及其在工业中的应用，详细介绍国内外学者在感应加热数值模拟方面所做的研究工作，最后给出本文的研究背景、意义和主要研究内容。 第二章：介绍了感应加热的基本原理，推导了感应加热工件内电磁场与涡流分布的理论公式，对感应加热涡流场计算的一般问题、传统感应加热工程工程设计计算的不足以及电磁场数值计算方法作了介绍。 第三章：介绍了ANSYS中引入复矢量磁位计算电磁场、涡流场的方法以及温度场求解的数学模型，简述了ANSYS软件中的电磁场、温度场以及耦合场分析。 第四章：根据感应加热问题的特点，建立了计算模型，确定了模拟计算中边界条件、网格划分、材料温度依赖性等问题的处理方法。 浙江工业大学硕十学位论文给出了感应加热数值模拟的基本过程以及电磁场温度场相互祸合的实现方法。 第五章:用ANSYS软件对感应加热过程中工件内涡流场、温度场的一些基本问题进行模拟及分析，主要包括:加热过程中工件涡流功率密度及温度分布规律;频率与磁力线逸散对加热效果的影响;同时对感应淬火淬硬层深度进行了模拟预测。 第六章:就感应加热在透热与淬火两大方面的实际应用工况进行模拟分析。结果表明，数值模拟结果与实际应用基本一致，证明了数值模拟方法的正确与实用性。 第七章:对全文进行总结，同时提出有待进一步研究和解决的问题。更多还原

【Abstract】 The induction heating generates heat by means of Joule effect resulting from an eddy current. It is widely used in industrial operations due to its high efficiency, precise control and low pollution properties. However, the design of an induction heating system based on experiments can be tedious, time-consuming and expensive. Therefore, numerical simulation is a wel-adapted tool for the design and the investigation of induction heating system. In this paper, on the basis of the characteristics of induction heating, the numerical simulation of induction heating is studied and realized. Seven chapters are included in this dissertation.In chapter 1, firstly, the history and applications of induction heating are introduced. Then, outlines the development and status about numerical simulation of induction heating. Finally, the backgrounds of this project and the main contents as well as the significance of this paper are mentioned.In chapter 2, gives a brief introduction to the basic theory of induction heating technique; a mathematical modal is developed to describe the distribution of electromagnetic field and eddy current density in the long solid cylinder billet of induction heating. The general question of eddy current field calculation and the weakness of design theories for induction-heating coils that has won great popularity in engineering are pointed out.In chapter 3, the mathematical modal of electromagnetic and temperature fields is presented by a complex magnetic vector potential, which is also applied to solve eddy current field in ANSYS software. Then, the electromagnetic field analysis, thermal analysis and coupled-field analysis in ANSYS are introduced.In chapter 4, the modeling of induction heating is expatiated. The methods thatrealized the boundary conditions, mesh of modal and dependence of the physical properties on the temperature are given. Moreover, a method for iterating thermal and magnetic analysis is put forward.In chapter 5, the distributed characteristics of eddy and temperature fields in induction heating process are simulation by FEM respectively, including the distributions of eddy and temperature fields during the whole induction heating process, the influence of frequency and magnetic disperse, and the prediction of hardened depth.In chapter 6, the calculation results are validated by comparison with the practical producing results. It is approved the validity and feasibility of the method used in this paper.Some results of this dissertation are concluded in the last chapter. Besides the future tasks on this project are pointed out.更多还原