Simple harmonic motion is also called harmonic motion. A mass point or other mechanical system that oscillates harmonically is called a harmonic oscillator. In classical mechanics, if the position coordinate of a mass point that oscillates harmonically is x and the momentum is p, its energy E is the sum of kinetic energy and potential energy, E=p 2 /(2m)+(1/2)kx 2 When the amplitude of simple harmonic motion is large, the potential energy of the oscillator contains terms that are equal to or greater than the cube of the displacement x. In this case, the oscillator is called an anharmonic oscillator. [Yoshiro Kainuma] Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend |
単振動は調和振動ともよばれる。調和振動をする質点や、その他の力学系は調和振動子とよばれる。古典力学では、調和振動をする質点の位置座標をx、運動量をpとすると、そのエネルギーEは、運動エネルギーと位置のエネルギーの和として 単振動の振幅が大きい場合には、振動子の位置エネルギーには、変位xの三乗以上の項が加わる。この場合の振動子は非調和振動子とよばれる。 [飼沼芳郎] 出典 小学館 日本大百科全書(ニッポニカ)日本大百科全書(ニッポニカ)について 情報 | 凡例 |
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