engleski

Produced levels mechanic vibration in operator cabin of agricultural tractor by various agrotechnical surfaces

Agricultural tractors have wide use on road and also off road, which is at exploitation and moving on the agrotehnical surfaces. Beside speed and uneven surface on which they are moving, very important factor that have an affect on exposure of operator by the high level of vibration that effect on whole body are the oldness of the technical system. Vibration generally present oscillatory moving of the body, and in the addiction of the trajectory form of moving body there are linear and angular oscillations. Human body perceives and absorbs vibration of 1 to 1000 Hz, and speed of vibration is distance which vibrated body passed in the unit of time and it is expressed in ms-1. Acceleration of vibration is change of speed of vibration in the unit of time, and it is ms-2. Purpose of the research is determination vibrations that have an affect on the operators whole body in relation to working hours of technical system in years 2015 and 2016, in accordance with prescribed standards HRN ISO 2631-1 and HRN ISO 2631-4. Measurement has been made 2015 and 2016 with tractor LANDINI POWERFARM 100 on access roads and production areas of Agricultural and Veterinary High School in Osijek. Vibrations that have an affect on whole body of operator were measured by device MMF VM30 with associated sensor. Results of research are pointing on increase level vibrations that have an affect on operators whole body on every measuring surfaces (asphalt, grass and macadam) with increasing working hours of tractor. Even though these research confirmed that on different agrotechnical surfaces the intensity of vibration is increasing in year 2016 in relation with previous one, the same will not be harmful on the health of the operator because they are not excessing the vibration limit that have an affect on whole body on the operator of 1, 15 ms-2 by the European directive requires 2002/44/EC.

agrotechnical surfaces ; agricultural tractor ; human whole body ; human vibrations

nije evidentirano