Research on the comfort degradation mechanism of high-speed railway passengers:a field study using dynamic interface pressure  

作　　者：Yong Peng Dayan Sun Chaojie Fan Zhifa Wu Shengen Yi Yuexiang Peng Yingjun Liu 

机构地区：[1]Key Laboratory of Traffic Safety on Track of Ministry of Education,School of Traffic&Transportation Engineering,Central South University,Changsha 410075,Hunan,China [2]Joint International Research Laboratory of Key Technology for Rail Traffic Safety,Central South University,Changsha 410075,Hunan,China [3]Research Laboratory of Hepatobiliary Diseases General Surgical Department,The Second Xiangya Hospital,Central South University,Changsha 410011,Hunan,China [4]Hunan Industry Polytechnic,Changsha 410208,Hunan,China [5]Locomotive Department,China Railway Guangzhou Group Co.,Ltd.,Guangzhou 510088,Guangdong,China.

出　　处：《Transportation Safety and Environment》2022年第4期51-63,共13页交通安全与环境（英文）

基　　金：the National Natural Science Foundation of China(Grant No.52075553);the Hunan Science Foundation for Distinguished Young Scholars of China(Grant No.2021JJ10059);the School Enterprise Cooperation Program of Central South University(Grant No.2021XQLH011).

摘　　要：Discomfort caused by long-term sitting decreases the passenger experience and may lead to musculoskeletal diseases, and this hasbecome one of the main problems for passengers of high-speed railways. However, the comfort degradation mechanism during longtermsitting in high-speed railways is still unknown. This study aimed to reveal passengers’ sitting comfort degradation mechanismin high-speed railways. By carrying out long-term sitting tests on high-speed trains running on the Shanghai-Kunming line, the dynamicinterface pressure and subjective comfort including overall and regional comfort of seven participants were obtained.Machinelearning models and statistical analysis methods were combined for data analysis to reveal the effect of regional comfort and thecontribution of sitting duration during the process of sitting comfort degradation. The results show that overall comfort is most significantlyinfluenced by the comfort of the shoulders, waist and buttocks. The seats play different roles before and after 20 minutesduring long-term sitting and there is a lag between the fatigue occurring and being offset. Therefore, the structure of seats affectsoverall comfort by affecting important regional comfort, and a long-term sitting test is necessary for accurate seat assessment. Thecomfort degradation mechanism can be used to define standards for long-term sitting comfort or provide guidance for seat evaluation,and the design and evaluation plan mentioned in this article for second-class seats can be applied to other cases with limitedaccommodating space.

关 键 词：High-speed railways pressure distribution seat comfort machine learning sitting fatigue 

分 类 号：U266[机械工程—车辆工程]