摘要
对人-椅界面体压分布指标、计算方法及其表征进行阐述,将体压分布指标分为基本指标、静态指标和动态指标3类。其中静态指标包括座椅压力分布SPD%、圆型压力梯度GC以及线型压力梯度GT,动态指标包括动态座椅压力分布DSPD%、压力变化率均方根Pcrms以及区域压力变化率aPcrms。通过不同曲面造型及不同硬度坐垫的体压分布实验研究,结果表明:GC、GT以及SPD%与座椅舒适度成线性关系,GC与GT值越小,坐骨结节处越舒适,SPD%值越小则座椅整体舒适度评价越高;曲面下凹适中的坐垫比平坦的坐垫较舒适;最大压力Pm以及SPD%可以明显的表征坐垫材料的软硬度,硬坐垫的Pm、SPD%值较大,但是当被试体重过大,超过一定的阈值后,SPD%表征材料软硬度的能力失效。
The parameter,calculation method and characterization of body-seat interface pressure distribution are expounded. The body pressure distribution parameter is divided into basic parameter,static parameter and dynamic parameter. Static parameter includes seat pressure distribution（ SPD%）,circular pressure gradient（ G^C） and transverse pressure gradient（ G^T）. Dynamic parameter includes dynamic seat pressure distribution（ DSPD%）,pressure change rate root-mean-square（ Pcrms） and area pressure change rate（ aPcrms）. By testing on the different surface molding and different hardness of seat foam,the result shows that there is a liner relation between G^C,G^T,SPD% and seat comfort. The smaller value GCor GTis,the more comfortable of ischial tuberosity area occupant feels. The smaller value SPD% is,the more comfortable of overall buttocks occupant feels. The moderate concave surface molding is more comfort than flat surface molding. The maximum pressure（ Pm） and SPD% can characterize the hardness of seat foam obviously. Hard seat foam has higher Pmand SPD% value. But SPD% can＇t reflect the hardness of seat foam if the weight of occupant is too large.
出处
《机械科学与技术》
CSCD
北大核心
2014年第9期1298-1303,共6页
Mechanical Science and Technology for Aerospace Engineering
基金
"十一五"国家科技支撑计划项目(2009 BAG12A01-F02
2009BAG12A01-E05-2)资助
关键词
座椅舒适度
体压分布指标
坐垫曲面
坐垫软硬度
body pressure distribution parameter
calculations
experiments
pressure distribution
pressure sensors
schematic diagrams
seat comfort
seat foam hardness
seat surface molding
