《那些古怪又让人忧心的问题》第79期:飞越减速带(1)
SPEED BUMP
飞越减速带
Q. How fast can you hit a speed bump whiledriving and live?
Q.最快能以多快的速度驾车冲过减速带并幸存下来?
A. SURPRISINGLY FAST.
A.非常非常快。
First, a disclaimer. After reading thisanswer, don't try to drive over speed bumps at high speeds. Here are somereasons:
首先,先说明下免责条款:在阅读完本文后,请不要驾车以高速通过减速带。原因如下:
You could hit and kill someone.
•你可能会害死别人。
It can destroy your tires, suspension, andpotentially your entire car.
•轮胎、悬挂甚至整辆车都会受到损害或损毁。
Have you read any of the other answers inthis book?
•你难道没读过这本书中的其他文章吗?
If that's not enough, here are some quotesfrom medical journals on spinal injury from speed bumps.
如果这还不够,那我引用几条医学期刊上因为减速带而造成的脊髓损伤的案例:
Examination of the thoracolumbar X-ray andcomputed tomography displayed compression fractures in four patients . . erior instrumentation was applied . . . All patients recovered well exceptfor the one with cervical fracture.
腰胸部X光以及计算机断层扫描结果显示四位患者有压缩性骨折……已进行后路椎体融合植入物固定手术……所有患者都恢复良好,除了一位颈椎骨折的患者。
L1 was the most frequently fracturedvertebra (23 /52, 44.2 percent).
一号腰椎骨(L1)是最常发生骨折的脊椎骨(23/52,44.2%)
Incorporation of the buttocks withrealistic properties diminished the first vertical natural frequency from ~12to 5.5 Hz, in agreement with the literature.
具有真实属性的臀部植入物能够将人体第一竖直自然频率从约12赫兹降到5.5赫兹,与文献相符。
(That last one isn't directly related tospeed bump injuries, but I wanted to include it anyway.)
(最后一条其实和减速带损伤并没有直接相关,但我还是想把它包括进来。)
Regular little speed bumps probably won'tkill you
普通的小型减速带不太会使你丧命
Speed bumps are designed to make drivers slow g over a typical speed bump at 5 miles per hour results in a gentlebounce,1 while hitting one at 20 delivers a sizable jolt. It's natural to assumethat hitting a speed bump at 60 would deliver a proportionally larger jolt, butit probably wouldn't.
设计减速带的目的就是要让驾驶员把车速降下来。以每小时5英里(约每小时8千米)1的速度通过一个普通的减速带只会造成很轻微的弹跳,而以每小时20英里(约32千米)的速度通过减速带就会造成相当大的颠簸。也许你会由此认为以每小时60英里(100千米)的速度通过减速带也会按比例造成更大的颠簸,但其实并不是那样。
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