摘要
基于人体坡道运动的动力学分析进行不同坡度的人员疏散试验,测定运动速度、步长等数据,定性分析行人输出功率的变化,得到行走速度、步长与坡度之间关系的经验公式。得出以下结论:随着坡度由5.6°上升至32.1°,运动耗能速率增大,而供能速率和输出功率逐渐降低,运动速度由5.03 m/s降低至0.74m/s。上坡运动中,坡度<25°时,无氧供能比例与人体输出功率不断降低,行走速度及步长下降较快;坡度>25°时,有氧供能的比例远大于无氧供能,人体输出功率趋于稳定,行走速度及步长下降趋于缓慢。下坡运动中,供能对速度影响较小,但行人会降低速度以防止摔倒,坡度越大,这种影响越明显。
Based on the kinetic analysis on personnel movement on slope, the evacuation experiments under different slope were car- ried out to test evacuation speed and step length. Qualitative analy- sis of the change of output power of the pedestrian on evacuation process was carried out, and the empirical formulas of the relation ship between the walking speed or step length and the slope were derived. The conclusions are as follows： when tbe slope rises from 5.6°to 32.1°degrees, the energy consumption rate increases, while the energy supply rate and output power decrease gradually, and the pedestrian speed decreases from 5.03 m/s to 0.74 m/s. During the uphill movement, when the slope is less than 25°, ox ygen free energy supply proportion and the output power of the hu man walking speed decreases, and the walking speed and step length decreases rapidly. When the slope is more than 25°, aerobic energy is far greater than the proportion of anaerobic energy sup- ply. The output power is stable, walking speed and step length de- crease slowly. During downhill movement, the influence of energy supply on speed is small, but pedestrians will reduce the speed to prevent themselves from falling. The greater the slope, more obvi- ous the effect.
出处
《消防科学与技术》
CAS
北大核心
2017年第11期1508-1511,共4页
Fire Science and Technology
关键词
人员疏散试验
坡度
行走速度
步长
输出功率
evacuation experiment
slope
movement speed
steplength
power output
