大客车事故,往往导致车身解体,伤亡惨重。这样的悲剧一再上演,让人们不得不重新审视大客车被动安全防护性能:车辆重心偏高、侧倾角较小,容易发生侧翻;没有全承载式的钢架结构,车厢一撞就散;没有安全带,甚至有了也不用,乘客很容易被甩出去……尽管如此,这依然符合我国现行大客车车辆安全性能要求。大 Bus accident, often leading to the collapse of the body, heavy casualties. Such a tragedy staged again and again, so that people have to re-examine the bus passive safety and protection performance: the vehicle center of gravity is high, smaller roll angle, prone to rollover; not fully loaded steel structure, the train hit a crash; no Seat belts, and even do not have to, passengers can easily be thrown out ... However, this is still consistent with China’s current bus vehicle safety performance requirements. Big