Roughness Analysis of Forest Roads and Ground Surface for Dynamic Simulation of Forestry Vehicles

摘要

To analyze ride quality and predict dynamic characteristics of forestry vehicles, the roughness of forest ground such as forest road, strip road, and forest floor was measured and analyzed. The power spectral density functions of roughness of forest g rounds for forestry vehicles were determined by use of an accelerometer mounted on a towed the fifth wheel of which the transfer function had previously been known The measured PSD (power spectral density) functions of forest grounds were compared with r oughness constant Kv. The results show that the measured PSD functions of forest ground were different by surface conditions. Therefore, the proposed measurement and analysis method is suitable to estimate or classify the forest ground for dynamic simula tion of forestry vehicles and will be utilized as a maintenance tool for forest road.