基于三轴加速度的公交乘坐振动舒适性研究

Study on Vibration Comfort of Bus Ride Based on Triaxial Acceleration

为探究影响公交乘坐振动舒适性的行驶环境因素,以坐姿乘客躯干三轴加速度计权值对振动舒适性进行分级度量,发现实验线路舒适性处于不舒适与非常不舒适两个水平.采用二项logistic回归模型研究发现:①交叉口区间存在站点时,计权均值增加5%,站点区间存在交叉口时,计权均值增加2%,但是二者导致的“量变”未带来舒适性水平的“质变”;②相比专用道条件,无专用道时计权均值增加34.9%,舒适性达到非常不舒适的概率是专用道条件下的27.8~45.5倍;③对于混行车道,单向车道数每增加一条,计权均值增加6.5%,舒适性达到非常不舒适的平均概率增加3.5倍.

In order to explore the driving environment factors that affect the vibration comfort of bus ride,the vibration comfort was measured by the weight of three-axis accelerometer of the trunk of sitting passengers,and it is found that the comfort of the experimental line is at two levels:uncomfortable and very uncomfortable.Using binomial logistic regression model,it is found that:①When there are stations in the intersection,the weighted average increases by 5%;when there is an intersection between stations,the weighted average increases by 2%,but the“quantitative change”caused by the two does not bring about the“qualitative change”of comfort level.②Compared with the condition of special lanes,the average weighting value increases by 34.9%when there is no special lane,and the probability that the comfort is very uncomfortable is 27.8~45.5 times that under the condition of special lanes.③For mixed lanes,when the number of one-way lanes increases,the weighted average increases by 6.5%,and the average probability that the comfort is very uncomfortable increases by 3.5 times.