Development of a new method for assessing condition of forest road surface

U radu se analizira nova metoda za procjenu stanja površinskog sloja šumskih cesta mjerenjem vibracija. Istraživanje je provedeno na dijelu šumske ceste tijekom vožnje vozila opremljenog mjernim uređajem kojim se mjere vibracije u sve tri osi, položaj i brzina vozila te vrijeme. Ispitivanja su provedena u oba smjera vožnje na dijelu ceste s različitim frekvencijama mjerenja, tlakovima u gumama i brzinama vožnje. Na temelju rezultata mjerenja stanja površinskog sloja šumske ceste preporučuje se frekvencija snimanja od 10 Hz, brzina vozila od 20 km/h te tlak u gumama od 2 bara.A new method for assessing condition of forest road surface layers by vibration measurements is analysed in the paper. The research was conducted on a forest road segment while driving a vehicle equipped with a measuring device for determining vibrations in all three axes, vehicle position, vehicle speed, and time. Tests were performed in both driving directions of the forest road segment using different measuring frequencies, tyre inflation pressures, and driving speeds. The recording frequency of 10 Hz, vehicle speed of 20 km/h, and tyre inflation pressure of 2 bars, can be recommended based on the forest road surface measurement results