The Effects of Different Field Operations on the Vibration Levels in an Agricultural Tractor

摘要

A series of field tests were devised to examine the effect different field operations had on the amount of mechanical vibration present in the chassis of a Valtra 8050 agricultural tractor. The tests consisted of both field and transport tests: static test, dynamometer test, road test, ploughing test and a power harrow test. All the tests were conducted with the front suspension system active, as this was the expected normal mode of operation. This helped remove vibrations created from the tractor pitching whilst moving forwards. To ensure that the results were fair and that comparisons could be made, the same forward speed, and PTO speed were used, and the same area of land (Harper Adams Soil Hall – a soil covered area) was used so that all the tests could be repeated. The results showed that the increased vibrations present in the chassis were the result of implements being fitted to the rear of the tractor. It was also found that each type of field operation created characteristics which could be replicated in component form in other operations. This has allowed areas of mechanical vibration to be identified which could be of potential concern; the areas identified can now be examined further with additional testing to reduce the overall vibrations passed into the cab and ultimately the driver.