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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Rheonomous ： ウィキペディア英語版 Rheonomous A mechanical system is rheonomous if its equations of constraints contain the time as an explicit variable. Such constraints are called rheonomic constraints. The opposite of rheonomous is scleronomous.〔〔 ==Example: simple 2D pendulum== As shown at right, a simple pendulum is a system composed of a weight and a string. The string is attached at the top end to a pivot and at the bottom end to a weight. Being inextensible, the string has a constant length. Therefore this system is scleronomous; it obeys the scleronomic constraint : $\backslash sqrt\; -\; L=0\backslash ,\backslash !$, where $(x,\backslash \; y)\backslash ,\backslash !$ is the position of the weight and $L\backslash ,\backslash !$ the length of the string. The situation changes if the pivot point is moving, e.g. undergoing a simple harmonic motion :$x\_t=x\_0\backslash cos\backslash omega\; t\backslash ,\backslash !$, where $x\_0\backslash ,\backslash !$ is the amplitude, $\backslash omega\backslash ,\backslash !$ the angular frequency, and $t\backslash ,\backslash !$ time. Although the top end of the string is not fixed, the length of this inextensible string is still a constant. The distance between the top end and the weight must stay the same. Therefore this system is rheonomous; it obeys the rheonomic constraint :$\backslash sqrt\; -\; L=0\backslash ,\backslash !$. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Rheonomous」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.