公交事件

在童年的五光十色的道路上,曾经有过多少有趣的事呀!现在我就向大家曝光一件我童年时的趣事——公交事件。我那年刚满5岁,姨妈带我从解放路口坐上了公交车。那时的我,活泼好动,姨妈好不容易把我请上公交车,一把把我按到座位上。我如坐针毡,屁股一挨到椅子,就一下子弹了起来,满车里跑。     

小轿车与自行车侧撞的运动分析

当机动车与自行车碰撞时,因自行车质量较小,故不能利用动量守恒定律对车辆碰撞的进行事故鉴定。一般先是根据小轿车在与自行车碰撞的前后留下了清晰的刹车印迹,直接利用刹车印公式就可计算事故前小轿车行驶的速度;其次,还可以根据自行车碰撞后刮擦地面的运动,计算出小轿车碰撞时的车速后再计算小轿车行驶速度;还可以利用骑车人平抛运动规律,计算出人体抛出的速度,它也就是小轿车在与人体碰撞时的车速,据此再计算小轿车行驶速度。最后根据三种方法计算出的速度值可以互相比较,从中估计车速的最合理取值。     

面对小偷

我曾经给儿子讲过一件真实的事情。在拥挤的公交车上,一个小孩发现一个小偷在偷一位乘客的钱包,他立刻大声告诉了那位乘客。小偷行窃没成功,在下车时,笑着摸了摸孩子的脸蛋,说,这孩子长得真漂亮。小偷下车后,孩子的母亲猛然发现孩子的脸上在流血。那个可恶的小偷,出于报复心理,在下车前,用夹在指间的刀片划     

装睡

正周末我带着10岁的儿子去公园玩,坐公交车时,车上特拥挤,儿子只好坐在我的大腿上。我眯着眼睡觉,半路上儿子叫醒我,原来是我身边站着一位刚上车的70多岁的老人,他正颤巍巍地缩在车厢一角。儿子把我叫醒,是叫我让座给老人。我不想拂了儿子的好意,就说:"大爷,您坐我这儿吧!"老人很客气地说了声:"谢谢。"下车后我问儿子:"为什么要叫醒我给老人让座?车上那么多年轻人都没有主动让座的吗?"儿子说,老人刚上车,乘客们马上齐刷刷地闭眼"睡"了,根本没人想过让座这回事儿。儿子还说,他还观察到,老人到站下车后,他们又都"醒"了,且有说有笑!     

Numerical Simulations of the Performance of Steel Guardrails Under Vehicle Impact

Road side barriers are constructed to protect passengers and contain vehicles when a vehicle crashes into a barrier. In general, full-scale crash testing needs to be carried out if a geometrically and structurally equivalent barrier has not previously been proven to meet the requirements of containing the vehicle and dissipating sufficient impact energy for passenger protection. As full-scale crash testing is very expensive, the number of data that can be measured in a test is usually limited, and it may not always be possible to obtain good quality measurements in such a test, a reliable and efficient numerical simulation of crash testing is therefore very useful. This paper presents finite element simulations of a 3-rail steel road traffic barrier under vehicle impact. The performance levels defined in Australian Standards AS5100 Clause 10.5 for these barriers are checked. The numerical simulations show that the barrier is able to meet low performance levels. However, the maximum deceleration is higher than the acceptable limit for passenger protection. If present, a kerb launches the vehicles into the barrier, allowing for the possibility of overriding the barrier under certain circumstances, but it redirects the vehicle and reduces the incident angle, which reduces impact force on the barrier. Further investigation into all common kerb profiles on roads should be carried out, as only one kerb profile is investigated in this study.     

挤公交

来了!来了!终于等到803公交车了。众人开始你推我挤。啊?车里这么多人!虽然公交车还没有停下来,正缓缓驶进车站,但已经能瞧见车内是相当拥挤,而我身旁还有一大群正在往车上挤的乘客。我犹豫了,上不上呢?上吧,这么多人,下车时大概都被挤成面条那么细了吧?不上,说不定后面的车更     

公交,让我欢喜让我忧

我记得有一次早上赶公共汽车,到站台的时候,汽车已经启动了。于是我只好边追边喊:"师傅,等等我!师傅,等等我呀!"这时一乘客从车窗探出头来冲我说了一句:"八戒你就别追啦!"今天坐公交车,遇到一个女侠在拥挤的车上放声高歌,旁若无人,一路从国语唱到粤语再唱到rap。唱得好也     

乘车遇险时

<正>发生起火,快撤离。若无法从车门撤离,可打碎车窗玻璃逃生。车辆碰撞,首先保护头胸。车辆翻滚,设法固定自身。车辆行驶,不跳车。