ModelY與ID6對撞測試 - 汽車
By Jacob
at 2021-09-27T09:52
at 2021-09-27T09:52
Table of Contents
※ 引述《DYE (請不要發我水球 收不到)》之銘言:
: https://m.bilibili.com/video/BV11b4y1y7rx
: https://m.bilibili.com/video/BV16Q4y1z7Kq
: 中國的自媒體似乎撞出癮了
: 可能是群眾愛看有較高的點擊率
: 這種對撞也是一翻兩瞪眼
: 但是解讀結果可能因為原作者團隊有立場偏向
: 造成某種程度的偏頗
: 大家還是看看就好
: ----
: Sent from BePTT on my HTC 2Q55300
Model Y curb weight: 1997~2010 kg
ID.6 curb weight: 2280 kg
1. 作用力等於反作用力,因碰撞時間相同故衝量也相當
2. 碰撞後原車動能絕大部分由車體結構吸收
這次中國車評的兩車對撞結果
對Model Y而言,比64kph撞牆的條件還要嚴苛
對ID.6 而言,比64kph撞牆的條件還要寬鬆
而尺寸&重量越大的乘用車,設計上緩衝潰縮區可吸收的能量越大
比較好的是拿ID.4(2069kg)和Model Y(1997~2010kg)
這也是NHTSA或NCAP強調的,撞測成績同量級才有比較意義
https://i.imgur.com/hNDnZuS.jpg
之前的文章
┌─────────────────────────────────────┐
│ 文章代碼(AID): #1TJt0Mn7 (car) [ptt.cc] Re: [新聞]Tesla安全聲明槓上NHTSA │
│ 文章網址: https://www.ptt.cc/bbs/car/M.1565487126.A.C47.html │
│ 這一篇文章值 85 Ptt幣 │
└─────────────────────────────────────┘
物理學沒學好沒關係,但不要亂誤導他人.....
推 hanchueh : ID6比Y重280公斤 本來就該受到比較少的衝擊09/26 17:54
推 hanchueh : 錯了 反作用力不一樣大09/26 18:17
推 hanchueh : 大車撞小車本來就是小車受到更多的衝擊09/26 18:25
推 hanchueh : 應該說 A給B 跟 B給A 的力是一樣09/26 18:28
→ hanchueh : 但是質量越大的會受到越小的位移改變09/26 18:28
→ hanchueh : 你在地球上跳一下 地球不會動 因為它質量超大09/26 18:29
→ hanchueh : ID6質量比 Model Y 大18% 所以相同結構強度09/26 18:30
→ hanchueh : Model Y會有多18%的位移扭曲變形是合理的09/26 18:30
推 hanchueh : 所以你的意思是 Model Y 吸能更強?09/26 18:36
→ hanchueh : 因為片中說 Model Y 變形更多09/26 18:36
推 hanchueh : 力是一樣 但質量比較小的會受到更大的加速度09/26 21:48
1. 兩車作用力相當
2. 位移是運動學,變形是材料力學,請不要混淆兩者
3. 變形量和重量無關,和材料E值與幾何形狀兩者有關
4. 變形大也不代表吸收能量大,除非同材料同幾何形狀
5. 撞測條件下材料會到塑性區域,變形量差幾%的數字沒啥意義
6. 負載條件是"力"或是"功率譜密度"(power spectral density, PSD)
不會拿加速度當條件
--
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