对“共振”定义的建议

• 作 者: 李力
• 机 构: 重庆市清华中学 400054
• 出 处: 中学物理教学参考
• 发表日期: 2005年07期
• 关键词: 高中物理教材 旧教材 受迫振动 《物理》 现行教材 位移共振 速度共振 人教版 振动系统 牛顿第二定律

一、问题的提出不同版本的高中物理教材对“共振”的定义存在着差异.人教版高中《物理》第一册(必修)旧教材中“共振”的定义为“在受迫振动中,驱动力的频率跟物体的固有频率相等时,振幅最大,这种现象叫做共振”.而现行教材中的定义为“驱动力的频率接近物体的固有频率时,受迫振动的振幅增大,这种现象叫做共振”.以上两种定义的差异是明显的,前者认为共振是“振幅最大的状态”,后者则认为共振是“振幅增大的过

I. Problems raised There are differences in the definition of “resonance” in different versions of high school physics textbooks. The first book (required) of the PEP “Physics” is defined in the old textbook as “resonance”. When the frequency of the driving force is equal to the natural frequency of the object, the amplitude is maximum, and this phenomenon is called resonance.” In the current textbook, the definition is: “When the frequency of the driving force approaches the natural frequency of the object, the amplitude of the forced vibration increases. This phenomenon is called resonance.” The difference between the two definitions is obvious. The former thinks that resonance is “the state with the largest amplitude”, while the latter thinks that the resonance is “the amplitude has increased.