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Resistance

Resistance

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Speed related<br />

Square of speed related<br />

Flange resistance : comes<br />

from hunting action<br />

swaying, oscillation<br />

• 與 車 廂 底 盤 輪 軸 距 離<br />

成 反 比 。<br />

• 不 易 量 測 , 通 常 以<br />

Train resistance 減 去<br />

Journal friction 和 Air<br />

resistance。<br />

Air resistance : 在 無 風 狀 況 下<br />

之 空 氣 阻 力<br />

• 與 車 速 平 方 成 正 比 , 與 車 廂 斷 面<br />

積 成 正 比 = CAV 2 (CAV 2 /wn)<br />

C : experimental coefficient<br />

A : cross section<br />

V : train speed<br />

w : weight per axle<br />

n : number of axles<br />

Running (Train) <strong>Resistance</strong> Models<br />

2<br />

20 KV<br />

R uM<br />

0.6<br />

0.01V<br />

<br />

w wn

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