C**T
发帖数: 5379 | 1 能否给我这个没文化的科普一下，为啥美帝的校车这么安全？悍马就不用提了，不值一
提，跟18轮对撞都不在话下，除了司机挂了，小孩一个都没死。是校车的crumple zone
设计的好呢，还是校车的铁皮用料高级呢，还是别的什么的？ |
i****x
发帖数: 17565 | 2 不是大师，但是重量肯定是最重要的。一个校车跟一辆yaris 40迈对头相撞，等于校车
20迈撞墙，yaris 60迈撞墙。 |
i****x
发帖数: 17565 | 3 另外我不确定校车有那么厉害，大多数恐怕都是传闻。校车比起一般的大巴，应该也没
有什么神奇之处。 |
r***e
发帖数: 10135 | 4 校车跟卡车底盘是一样的，有加固大梁的
【在 i****x 的大作中提到】
: 另外我不确定校车有那么厉害，大多数恐怕都是传闻。校车比起一般的大巴，应该也没
: 有什么神奇之处。
|
i****x
发帖数: 17565 | |
i****x
发帖数: 17565 | 6 我查了一下，校车安全标准还是70年代定的。
1977 safety standards
The focus on structural integrity spurred new requirements in the U.S.
Federal Motor Vehicle Safety Standards for school buses, most of which
became applicable for school buses on April 1, 1977. These standards are
still in effect today.
Standard No. 217 - Bus Emergency Exits and Window Retention and Release (
Effective September 1, 1973)
This established requirements for bus window retention and release to reduce
the likelihood of passenger ejection in crashes, and for emergency exits to
facilitate passenger exit in emergencies. It also requires that each school
bus have an interlock system to prevent the engine starting if an emergency
door is locked, and an alarm that sounds if an emergency door is not fully
closed while the engine is running.
Standard No. 220 - School Bus Rollover Protection (Effective April 1, 1977)
This established performance requirements for school bus rollover protection
, to reduce deaths and injuries from failure of a school bus body structure
to withstand forces encountered in rollover crashes.
Standard No. 221 - School Bus Body Joint Strength (Effective April 1, 1977)
This established requirements for the strength of the body panel joints in
school bus bodies, to reduce deaths and injuries resulting from structural
collapse of school bus bodies during crashes.
Standard No. 222 - School Bus Passenger Seating and Crash Protection (
Effective April 1, 1977)
This established occupant protection requirements for school bus passenger
seating and restraining barriers, to reduce deaths and injuries from the
impact of school bus occupants against structures within the vehicle during
crashes and sudden driving maneuvers.
Standard No. 301 - Fuel System Integrity - School Buses (Effective April 1,
1977)
This specified requirements for the integrity of motor vehicle fuel systems,
to reduce the likelihood of fuel spillage and resultant fires during and
after crashes.
These new federal standards brought significant change to the design,
engineering, and construction of school buses and a substantial improvement
in safety performance. Further improvement has resulted from continuing
efforts by the U.S. National Highway Traffic Safety Administration (NHTSA)
and Transport Canada, as well as by the bus industry and various safety
advocates.
【在 r***e 的大作中提到】
: 校车跟卡车底盘是一样的，有加固大梁的
|
T**********2
发帖数: 2198 | 7 School Bus本身的行车速度有限，不会像现代的豪华Coach那样在高速上90mph的cruise
，这个是外部非车辆因素
在低速碰撞中，校车的坚硬程度和侧面那些黑色的加固钢板可以摧毁绝大多数民用车。
reduce
to
【在 i****x 的大作中提到】
: 我查了一下，校车安全标准还是70年代定的。
: 1977 safety standards
: The focus on structural integrity spurred new requirements in the U.S.
: Federal Motor Vehicle Safety Standards for school buses, most of which
: became applicable for school buses on April 1, 1977. These standards are
: still in effect today.
: Standard No. 217 - Bus Emergency Exits and Window Retention and Release (
: Effective September 1, 1973)
: This established requirements for bus window retention and release to reduce
: the likelihood of passenger ejection in crashes, and for emergency exits to
|
A***n
发帖数: 8859 | 8 道理对，数字不准。校巴撞yaris，无论什么速度，都比20mph撞墙好些。
【在 i****x 的大作中提到】
: 不是大师，但是重量肯定是最重要的。一个校车跟一辆yaris 40迈对头相撞，等于校车
: 20迈撞墙，yaris 60迈撞墙。
|
l********7
发帖数: 1077 | 9 都是60mile，但是yaris撞的是墙，校车撞的是一个易拉罐
【在 i****x 的大作中提到】
: 不是大师，但是重量肯定是最重要的。一个校车跟一辆yaris 40迈对头相撞，等于校车
: 20迈撞墙，yaris 60迈撞墙。
|
l********7
发帖数: 1077 | 10 首先校车本身就是辆卡车，还有个frame很大很粗的cabin，大卡车要想迎面把整个
cabin从头撞溃到乘客区。是不可能的，最多把驾驶员撞死。即使是卡车，也最多驾驶
舱被撞毁，如果卡车后面驮着一个铁笼，里面的乘客也不会有事。
如果用吸能理论来分析，从校车车头到乘客区的这段几米距离，都是吸能区域比轿车长
了10多倍，要想把它压扁的所需的力，也大了十几到几十倍，吸能能力是轿车几百倍
其次校车底盘高，撞小车就和轧松鼠一样。更可怕的是，悍马的发动机前仓根本没机会
溃散，驾驶仓就和校车尾部大梁接吻了
zone
【在 C**T 的大作中提到】
: 能否给我这个没文化的科普一下，为啥美帝的校车这么安全？悍马就不用提了，不值一
: 提，跟18轮对撞都不在话下，除了司机挂了，小孩一个都没死。是校车的crumple zone
: 设计的好呢，还是校车的铁皮用料高级呢，还是别的什么的？
|
