对机械波半波损失现象的物理解释

›› 2015, Vol. 28 ›› Issue (11): 41-.

对机械波半波损失现象的物理解释

李存志

(西安电子科技大学物理与光电工程学院,陕西西安 710071)

出版日期:2015-11-15 发布日期:2015-12-15
作者简介:李存志(1964—),男,博士,教授,硕士生导师。研究方向:无线电物理。E-mail:licunzh64@126.com

Physical Interpretation of Half Wave Loss of Mechanical Wave

LI Cunzhi

(School of Physics and Optoelectronic Engineering,Xidian University,Xi'an 710071,China)

Online:2015-11-15 Published:2015-12-15

摘要/Abstract

摘要：

机械波的半波损失现象长期困扰着科学工作者,对于机械波的半波损失现象虽然有数学证明,但证明过程多偏重于数学推导,大都缺乏明确的物理图像。文中根据介质分界面处的边界条件,试图用物理的方法来解释机械波的半波损失现象,以期对半波损失现象给出一个清晰的物理图像。文中还讨论了机械波在固定端和自由端处的反射和透射。

关键词: 机械波, 半波损失, 固定端, 自由端

Abstract:

The half wave loss of mechanical wave has confused the scientists for a long time.Although it has been proved by the mathematical method,the proof focuses mostly on the mathematical derivation and fails to offer a clearly physical picture.In this paper,the half wave loss of mechanical wave is explained by a physical method in terms of boundary conditions in order to give a clearly physical picture for it.The reflected wave and the transmitted wave caused by a fixed end and a free end on a string are also discussed.

Key words: mechanical wave;half wave loss;fixed end;free end

中图分类号:

李存志. 对机械波半波损失现象的物理解释[J]. , 2015, 28(11): 41-.

LI Cunzhi. Physical Interpretation of Half Wave Loss of Mechanical Wave[J]. , 2015, 28(11): 41-.