今天花了6600大洋買了鈦鋁圈螺絲 - 汽車
By Oliver
at 2016-06-21T09:53
at 2016-06-21T09:53
Table of Contents
: 推 Fankthia: 簧下重量減少0.54kg,1:15計算,等於簧上重量減少8.1kg 06/21 09:14
借問一下,
簧下重量減少1kg = 簧上重量減少15kg
到底是怎麼算的啊?
輪子加速的單位是角加速度
在力矩不變的情況下
轉動慣量越小角加速度越快
問題是轉動慣量是所有轉動件對輪心距離平方乘上單位重量的積分
也就是說,
相同重量但不同形狀下,轉動慣量差異可能非常大
輪圈的質量分佈主要在距圓心最遠的外面那一圈
所以,討論"重量比"意義似乎不大
而且也不可能有1:15這種放諸四海皆準的數據可以套用...
此外,由於螺絲位於輪圈圓心處
對轉動慣量的影響必然比輪圈還要小...
我個人非常懷疑1:15這種數據是怎麼算出來的...
有強者可以推導一下嗎?
--
借問一下,
簧下重量減少1kg = 簧上重量減少15kg
到底是怎麼算的啊?
輪子加速的單位是角加速度
在力矩不變的情況下
轉動慣量越小角加速度越快
問題是轉動慣量是所有轉動件對輪心距離平方乘上單位重量的積分
也就是說,
相同重量但不同形狀下,轉動慣量差異可能非常大
輪圈的質量分佈主要在距圓心最遠的外面那一圈
所以,討論"重量比"意義似乎不大
而且也不可能有1:15這種放諸四海皆準的數據可以套用...
此外,由於螺絲位於輪圈圓心處
對轉動慣量的影響必然比輪圈還要小...
我個人非常懷疑1:15這種數據是怎麼算出來的...
有強者可以推導一下嗎?
--
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