Characterization of Longitudinal Road Unevenness in the Light of the International PIARC - EVEN Experiment 1998

The basic model of road pavement unevenness (homogeneous random function with Gaussian distribution function and simple power spectral density function) is generalized to cover real states of roads under traffic conditions, such as: independent characterization of long and short wavelengths unevenness, and consideration of non-homogeneity including appearance of individual large imperfections. The method of estimating relevant parameters is based on the interaction coupling between the traveling vehicle and the road. To justify the need for these generalizations, summarizing results are given of the International PIARC - EVEN experiment conducted in 1998 in three world regions (Arizona, USA, Hokkaido, Japan, and Netherlands / Germany). Total 47 road sections of different technological execution and different unevenness levels were tested using DYNVIA device.     

耦合式单轴转向架

介绍1种新型的径向设计方案——耦合式单轴转向架。该转向架在各种半径的曲线线路上具有非常理想的通过性能,而且在改善曲线通过性能的同时,可提高车辆的直线运行稳定性。通过试验确认了该转向架具有良好的动力学性能。