有限元仿真辅助电磁场时域频域性质教学  

FINITE ELEMENT SIMULATION AIDED TEACHING OF ELECTROMAGNETIC FIELD PROPERTIES IN TIME DOMAIN AND FREQUENCY DOMAIN

作　　者：高永潘 芦鹏飞 王川[2] GAO Yongpan;LU Pengfei;WANG Chuan(School of Electronic Engineering,Beijing University of Posts and Telecommunications,Beijing 100876;College of Artificial Intelligence,Beijing Normal University,Beijing 100875)

机构地区：[1]北京邮电大学电子工程学院,北京100876 [2]北京师范大学人工智能学院,北京100875

出　　处：《物理与工程》2022年第4期39-45,共7页Physics and Engineering

基　　金：国家自然科学基金(62101057;62071448)。

摘　　要：大学物理教学中,一些实际例子的展示有助于培养学生对于相关现象的物理直觉。本文以加深学生对大学物理电磁场部分中时域与频域的关系的认识为目的,借助现代计算机技术,使用有限元方法实现电磁场教学中时域和频域两种研究方法的实时展示。这种直观的展示有助于加深学生对于物理系统时域演化和频域特性的认识。对于更深入的电磁场频谱的教学,本文则展示了利用时域演化和频域耦合两种方法研究电磁波非线性晶体中传播后的系统频谱特性,并对结果进行对比,该方法有利于学生增强对于电磁场时频特性的理解。在教学过程中,通过快速的演示使得同学在掌握这两种方法的同时充分认识两种方法的有效性和局限性,夯实未来学生工程实践过程中的物理认知。In the processing of college physics teaching, it is helpful to show some practical examples to cultivate students’ physical intuition. This paper aims to deepen the students’ understanding of the relationship between time domain and frequency domain in the part of university physics electromagnetic field. With the help of modern computer technology, by using finite element methods, it is able to realize the real-time display of two research methods in the time domain and frequency domain in electromagnetic field teaching, which is helpful to deepen students’ understanding of the time domain evolution and frequency domain characteristics of physical systems. For more in-depth teaching of electromagnetic field spectrum, this paper demonstrates the use of time-domain evolution and frequency-domain coupling to study the spectral characteristics of the system after electromagnetic wave propagation in nonlinear crystals, and compares the results. In the teaching process, through quick demonstrations, students can fully understand the effectiveness and limitations of the two methods while mastering these two methods, so as to consolidate the physical cognitive foundation of future students in the process of engineering practice.

关 键 词：有限元 时域 频域 电磁场教学 

分 类 号：O441.4-4[理学—电磁学] G642[理学—物理]