Browse Publications Technical Papers 2019-01-1479
2019-06-05

Noise and Vibration Prediction and Validation for Off-Highway Vehicle Cab using Hybrid FE-SEA Methodology 2019-01-1479

Operator noise is an important aspect for noise and vibration of off-highway vehicles and operator cab is critical for operator comfort. The noise level inside the cab is influenced by structural and acoustic transfer path. In this paper, we used hybrid FE-SEA approach to consider both structural and acoustic transfer path as FEM and SEA methods individually faces limitations in high and low frequencies respectively. A hybrid FE-SEA cab model was built and is used to predict the structural and acoustic transfer functions. The analysis model was built with the systematic approach with validation at each step with the laboratory test results. Structural excitations were applied at cab mount locations and accelerations across various locations on the cab are predicted and validated. For the acoustic transfer function, the cab was excited with the volume velocity source inside the cab and sound power output of various panels were calculated and compared to the test results. Good agreement is observed between the simulation and the test results.

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