Biodynamic Responses of Seated Human Exposed to Vertical Vibrations in Running High-speed Rail Vehicle
In the high-level mechanical society, everyone is suffering the impact of vibration in the daily life. As travel increases people are becoming more concerned with vibration and seeking a more comfortable environment. Researches on the effects of vibration to seated human have indicated that side effects can be very harmful and in some cases lead to permanent injuries. Some researchers have constructed the lumped-parameter human models which consist of lumped masses , springs and dashpots. But those researches focus on the auto industry. In the rail industry , riding comfort is evaluated as a major character of vehicle dynamics. And the acceleration of car-body is a major target in the evaluation criterion of riding comfort , which include the acceleration value and frequency of car body vibration and time. There need more accurate and suitable models to be analyzed for studying biodynamic response in running high -speed rail vehicles. Paper apply Muksians model in the auto industry to construct non-linear dynamic models which consist of lumped-parameter human models in the rail industry for researching biodynamic re -sponse of seated human in running rail vehicles by simulating. The results show that lumped -parameters of human models, such as frequency of disturbance , location of passenger (s) , vehicle velocity, and mechanical properties of seat ,have different effects on biodynamic response of seated human ex -posed to vertical vibration. The results show that position located at 2. 2m away from the center of carboy along x-axis for a passenger can attach the least vibration exposure. In addition,an increase in velocity tends to reduce the riding comfort of a given vehicle when exposed to a sinusoidal dis -turbance maintained long time in the roadline. Furthermore, riding comfort can be increased with an increase in the damping coefficient of the seat up to about 1600N· s/m and remain almost identical thereafter. However, stiffness in the seat has the reverse effect.
Hai ZHANG Chengguo WANG Qian XIAO
Mechanical and Electrical school, East China Jiaotong University , No.808 Shuanggang east road ,Nanc Railway Science & Technology Research & Development Center , China Academy of Railway Science ,No.2
国际会议
5th International Symposium on Environmental Vibration(第五届环境振动国际研讨会)
成都
英文
85-94
2011-10-20（万方平台首次上网日期，不代表论文的发表时间）