Vibration Control of An Engine Hood on A Tractor

Engine is a main vibration source for a tractor. Under its excitation, the engine hood on a tractor may vibrate seriously, because the hood is connected rigidly to the tractor body or frame. As a result, some instruments and lights equipped on the hood may be damaged or can’t work well. In order to control the hood vibration, an engine hood on a wheeled tractor is investigated here. At first, the vibration transmission path was studied. Then the hood vibration was tested and analyzed with the technique of frequency analysis. And the natural vibration characteristics analysis on the hood was also conducted with the technique of experimental modal analysis. Based on the analysis results, some measures for reducing the vibration were applied. So the hood vibration was reduced obviously, and its vibration situation was improved noticeably.