相关实验视频
Updated: Jul 27, 2026

07:08
Modified Drop Tower Impact Tests for American Football Helmets
Published on: February 19, 2017
10.9K
前部NCAP碰撞测试与后座乘客
1ProBiomechanics LLC, Bloomfield Hills, Michigan.
Traffic injury prevention
|February 26, 2024
概括
早期的正面碰撞测试显示,后座座椅对儿童的安全装置不足. 1979年,国家公路交通安全管理局 (NHTSA) 的撞车测试中,腰带导致儿童玩具的头部受到严重冲击,突出显著的安全风险.
科学领域:
- 在汽车正面碰撞中保护乘客.
- 儿童玩具动力学和车辆安全测试中的伤害评估.
背景情况:
- 1979年国家汽车评估计划 (NCAP) 的正面碰撞测试评估了前座乘客和后座儿童乘客的安全套系统.
- 这些早期的测试使用了前排座位的腰带和前排座位的肩带,以及后排座位的6岁儿童玩偶的腰带.
研究的目的:
- 为了分析前排乘客和后排儿童在35英里/小时前屏障碰撞测试中的控制性能.
- 为了比较乘客和儿童的玩具反应,以了解早期车辆安全评估中的受伤风险.
主要方法:
- 从NHTSA数据库 (#1-#100) 审查了15个前壁冲击测试,重点是以35英里/小时的速度进行的测试.
- 用于前座乘客的混合II型 (第572部分) 人形 (带肩带) 和后座座位的Alderson VIP 6岁儿童人形 (带带).
- 分析了车辆动态,乘客动力学,并比较了模拟器的反应,包括头部损伤标准 (HIC) 和胸部加速.
主要成果:
- 在35英里/小时的测试中,前排乘客显示出高平均HIC (驾驶员:1099,乘客:1179) 和胸部加速,13辆车中的7辆车在两个位置都没有满足FMVSS 208伤害标准.
- 后部儿童玩偶的反应明显恶化,平均HIC为2711 (2.47x司机,2.30x乘客) 和高胸加速 (62.8g).
- 儿童玩偶表现出刀,潜水和严重的头部撞击与内部部件;所有车辆都没有达到后部儿童伤害标准.
结论:
- 1979年的NCAP测试表明,后方儿童乘客使用腰带的控制能力不足,导致严重的头部冲击和潜水.
- 尽管NHTSA建议改进后座安全带系统,但NHTSA没有公开披露这些不良的后座安全带结果.
- 随后的NCAP测试将近25年没有包括后座儿童乘客,这表明在评估后座安全方面存在差距.
相关概念视频
Collisions in Multiple Dimensions: Problem Solving
In multiple dimensions, the conservation of momentum applies in each direction independently. Hence, to solve collisions in multiple dimensions, we should write down the momentum conservation in each direction separately. To help understand collisions in multiple dimensions, consider an example.
A small car of mass 1,200 kg traveling east at 60 km/h collides at an intersection with a truck of mass 3,000 kg traveling due north at 40 km/h. The two vehicles are locked together. What is the...
A small car of mass 1,200 kg traveling east at 60 km/h collides at an intersection with a truck of mass 3,000 kg traveling due north at 40 km/h. The two vehicles are locked together. What is the...
Friction: Problem Solving
Friction is an essential force that influences the motion of objects in daily life. Depending on the situation, it can be either beneficial or problematic. Consider a bus with a mass of three megagrams and its center of mass at a specific point, moving along a banked road at a constant speed. The coefficient of static friction between the tires and the road is 0.5. Find the maximum angle of the banked road at which the bus would not slip or tip.
Initially, a visual representation of the...
Initially, a visual representation of the...
Normal and Tangetial Components: Problem Solving
Consider a man with a mass of 70 kg seated in a chair connected to a pin support through a member BC. If the man maintains an upright position, the task is to determine the horizontal and vertical reactions of the chair on the man when the member makes a 45° angle with the horizontal. At this moment, the man has a speed of 5 m/s, increasing at a rate of 1 m/s².

