Presentation is loading. Please wait.

Presentation is loading. Please wait.

設計橋樑/結構與強度 材料: 20根吸管,1m膠帶 橋長: 25cm 除兩端之外不能用橋墩

Similar presentations


Presentation on theme: "設計橋樑/結構與強度 材料: 20根吸管,1m膠帶 橋長: 25cm 除兩端之外不能用橋墩"— Presentation transcript:

1 設計橋樑/結構與強度 材料: 20根吸管,1m膠帶 橋長: 25cm 除兩端之外不能用橋墩
材料: 20根吸管,1m膠帶 橋長: 25cm 除兩端之外不能用橋墩

2

3 3 振盪 尼米茲公路上的悲劇 1989 The Loma Prieta Earthquake, 7.1 on the Richter scale, causes the double-decked Nimitz Freeway (I-880) in Oakland, CA, to collapse, killing 67, and damages the Embarcadero Freeway, the San Francisco-Oakland Bay Bridge, and other roads in the Bay Area. The death toll is less than at first expected--although the earthquake occurred during evening rush hour, many residents had gone home early to watch the Oakland A's and the San Francisco Giants in the World Series.

4 3.1 簡協運動 Simple Harmonic Motion (SHM) Frequency (頻率) [hertz(Hz)] - f
Period (週期) - T Periodic/harmonic motion displacement

5 振幅、週期、相位、角頻率 角頻率 Amplitude, phase, and angular frequency

6 速度、加速度

7 3.2 SHM 中的作用力

8 例一 板子+二逆向轉軸 力平衡方程式

9 k = 0.40 L = 2.0cm 力矩平衡方程式

10 3.3 SHM 中的能量

11 圖示

12 3.4 An Angular SHM 扭擺

13 例二由扭擺求轉動慣量

14 由扭擺求週期

15 3.5 Pendulum 單擺 The Simple Pendulum

16 物理擺 單擺

17 測量g值

18 例三 圓盤物理擺求週期 h = R/2

19 例四 企鵝跳水 m = 12kg k = 1300N/m

20 3.6 SHM 和等速率圓周運動 SHM 是等速率圓周運動在其圓周直徑之投影

21 有阻滯 S H M Damped (阻尼) 阻滯力 微分方程式

22 指數衰減

23 3.7 強迫振盪與共振 自然頻率與外來驅動頻率 共振條件 共振例 Radio and TV tuning
3.7 強迫振盪與共振 自然頻率與外來驅動頻率 共振條件 共振例 Radio and TV tuning The collapse of the Nimitz freeway The Tacoma narrow bridge The bay of Fundy

24 共振圖示

25 共振圖示

26 例五 盪秋千

27 例六 The Tacoma narrow bridge
Howard Clifford

28 例七 The collapse of the Nimitz freeway

29 例八 全球最大的潮差 Bay of Fundy the average tide range is 12 metres and can reach 16 metres when the various factors affecting the tides are in phase Earth's mid-ocean tide reaches an average height of 0.51 meters

30 敬請期待 物理 V–波動

31 簡協運動的動畫

32 Simple Harmonic Motion

33 Harmonic Motion


Download ppt "設計橋樑/結構與強度 材料: 20根吸管,1m膠帶 橋長: 25cm 除兩端之外不能用橋墩"

Similar presentations


Ads by Google