VIBRATION ANALYSIS OF TRACTOR IN DIFFERENT AGRICULTURAL OPERATIONS
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Date
2019
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Publisher
Orissa University of Agriculture and Technology, Bhubaneswar
Abstract
Farm mechanization plays a vital role in improving the production and productivity of the agricultural sector. Tractors are versatile vehicles mainly used for both off road and on road condition. They are used for both primary and secondary tillage operations and as a means transportation due to which tractors were operated in undulated terrain condition for which tractor operators are exposed to high level of Whole body vibration (WBV) and Hand arm vibration (HAV). These vibrations when transmitted to the operator may cause various musculoskeletal disorders. The tractors available in College of Agricultural Engineering and Technology, OUAT, Bhubaneswar were selected for vibration measurement. Among all the tractors, four tractors were selected based on their hours of use and rated power. Hence, a study was conducted to evaluate the effect of tractor use hour, operator weight, speed and depth of operation on whole body vibration and hand arm vibration. The physiological response of the tractor operators were also recorded after and before the operation. The overall vibration value for MB plough, cultivator, rotavator, kutcha road and tar road was observed to be 1.41 m/s2, 1.53 m/s2, 1.62 m/s2 ,1.01 m/s2 ,0.85 m/s2 for WBV and 2.87 m/s2 , 2.97 m/s2,3.26 m/s2,2.71 m/s2, 2.53 m/s2 HAV respectively. The tractor having more number of hour use was found to be more vibration value. While collecting the WBV data of three operators, it was observed that the operator of 75 kg has less vibration value than 65 kg and 85 kg operator. Vibration value (both WBV and HAV) was observed to be directly related to the speed of operation. However, increase in depth of operation was found to have reducing effect on WBV and HAV. The heart rate and oxygen consumption rate were found to be increased with increase in body weight and it was recorded to be 143 beats/min, 1.21 l/min respectively for 85 kg operator.
Description
Th-5628
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