The age of the tractor and the type of driving surface as a vibration factors on an agricultural tractor

U radu su izneseni rezultati istraživanja i usporedba mjerenja proizvedene razine traktorskih vibracija s obzirom na starost traktora i vrstu vozne podloge, a kao čimbenika koji utječu na trup rukovatelja u skladu s propisanim normama HRN ISO 2631-1 i HRN ISO 2631-4. Mjerenja su obavljena 2015., 2016. i 2017. godine na traktoru Landini Powerfarm 100 na pristupnim cestama i proizvodnim površinama Poljoprivredne i veterinarske škole u Osijeku. Mjerenja su provedena uređajem MMF VM30. Rezultati prikazuju usporedbu mjerenja iz kojih je vidljivo da uslijed povećanja radnih sati traktora dolazi i do djelomičnog povećanja razine vibracija koje utječu na trup rukovatelja na svim mjernim voznim podlogama (asfalt, trava i makadam). Najviša razina vibracija 2015. godine izmjerena je na travi, dok je u 2016. godini najviša razina vibracija izmjerena na makadamu, a u 2017. godine najviša izmjerena vrijednost također je bila na makadamu. Na asfaltnoj podlozi u svim godinama mjerenja izmjerena je najniža razina vibracija. Izmjerene vrijednosti nisu prelazile dopuštenu vrijednost od 1,15 m/s2The thesis presents the results of the research and comparison of measurements of the produced level of tractor vibration with considering of the age of the tractor as factors affecting the hull of the operator in relation to tractor hours in 2015, 2016 and 2017 in accordance with the prescribed standards HRN ISO 2631-1 and HRN ISO 2631-4. Measurements 2015, 2016 and in 2017, they were performed on the Landini Powerfarm 100 tractor on the access roads and production surfaces of the Agriculturaland Veterinary School in Osijek. Measurements were made with an MMF VM30. The results show a comparison of measurements over three years, which shows that the increase in tractor operating hours results in a partial increase in vibration levels affecting the operator's hull on all measuring surfaces (asphalt, grass and macadam). The highest vibration level in 2015 was measured on grass, while in 2016 the highest vibration level was measured on macadam, and in 2017 the highest measured value was also on macadam. On the asphalt surface, the lowest vibration level was measured in all years of measurement. The measured values did not exceed the permitted value of 1.15 m/s2