力学中链条下落问题的探讨  

A Discussion on the Chain Falling Question in Mechanics

作　　者：林正喆 陈熙[1] LIN Zhengzhe;CHEN Xi(School of Physics,Xidian University,Xi’an,Shaanxi710071)

机构地区：[1]西安电子科技大学物理学院,陕西西安710071

出　　处：《物理通报》2023年第6期23-26,30,共5页Physics Bulletin

基　　金：2022年西安电子科技大学招生培养综合改革研究项目“政府协同下的西安高校联合省外招生探索”,项目编号:ZS322019;陕西省自然科学基础研究计划,项目编号:2021JQ-185.

摘　　要：在经典力学教学中,链条运动问题是连续变形体动力学中的典型问题.对此类问题的课堂教学常见示例进行了研究,指出理论分析与实际情况的不符之处,并运用力学原理进行分析,提出与事实更加接近的理论模型.研究结论可作为新内容在力学课堂教学中进行介绍,使学生深入认识力学基本原理,提高运用力学原理解决实际问题的能力.In the teaching of classical mechanics,the motion of chains is a typical problem about the dynamics of continuous deformation body.This paper studies the common examples of such problems in teaching,points out the inconsistencies between theoretical analysis and the actual situations,analyzes the questions by using mechanics principles,and brings a theoretical model that is closer to the facts.The research conclusion can be introduced as a new content in mechanics teaching,so that students can deeply understand the basic of mechanics and improve their ability to solve practical problems by using mechanics principles.

关 键 词：连续变形体 动量定理 角动量定理 

分 类 号：O3-4[理学—力学] G642[文化科学—高等教育学]