SIMULATION FOR TRACTOR CABIN VIBROACOUSTIC OPTIMIZATION

In recent years, tractor operators have indicated a preference to drive more comfortable tractors. The high noise and vibration levels to which drivers of agricultural tractors often are exposed for long periods have a significant role in driver fatigue and also may lead to substantial hearing impairment and other health problems.

Therefore, it is essential for an optimal cabin design to have time- and cost-effective analysis tools for the assessment of the noise and vibration characteristics of various design alternatives at both the early design stages and the prototype testing phase. Engine excitation is transferred through the cabin suspension to the body and then resonates with the body structural mode. According to analysis of the body panel contribution, the biggest contributor to booming is the floor. If the floor is modified, the stiffness at the interface is increased and the coupling between the floor mode and engine excitation frequency is avoided-and interior booming is significantly reduced.