Giacomin J
Department of Mechanical Engineering, The University of Sheffield, UK.
Appl Ergon. 2000 Apr;31(2):207-15. doi: 10.1016/s0003-6870(99)00034-4.
A growing issue in the area of vehicular ride comfort is that of child safety seats. Postural, thermal and vibrational comfort considerations are finding their way into child seat design. This paper makes some observations regarding the current state of child safety seat design, then goes on to present the results of vibration tests performed over two road surfaces using two child seats and two children. The vibration levels measured at the interfaces between the children and their seats were found to be higher than the vibration levels between the driver and the driver's seat. Calculated power spectral densities and acceleration transmissibility functions showed that the vibration transmission characteristics of the coupled system consisting of the automobile seat, child seat and child were different from those of the driver/seat system. Whereas, automobile seats normally reduce vibrational disturbances at most frequencies, the child seats tested amplified vibration at most frequencies up to 60 Hz.
车辆乘坐舒适性领域中一个日益突出的问题是儿童安全座椅。姿势、热舒适性和振动舒适性方面的考量正逐渐融入儿童座椅设计中。本文对儿童安全座椅设计的现状进行了一些观察，接着呈现了使用两个儿童座椅和两名儿童在两种路面上进行振动测试的结果。结果发现，在儿童与其座椅之间的界面处测得的振动水平高于驾驶员与驾驶员座椅之间的振动水平。计算得到的功率谱密度和加速度传递函数表明，由汽车座椅、儿童座椅和儿童组成的耦合系统的振动传递特性与驾驶员/座椅系统不同。通常情况下，汽车座椅在大多数频率下会降低振动干扰，而测试的儿童座椅在高达60Hz的大多数频率下会放大振动。
