Measurement and Simulation Analysis of Noise and Vibration in a Combine Harvester Cab Based on Pivot Noise Transfer Function and Vibroacoustic Coupling Method

This resource gives guidance on how to study low‑frequency noise and vibration in the cabins of agricultural machines, especially the combine harvester cab. The paper uses a hybrid method that mixes experimental validation with a finite‑element (FEM) vibro‑acoustic coupling analysis. A coupled FEM model is built to show how the cab’s solid structure interacts with its internal air cavity, and the excitation paths are clearly defined. The analysis looks at how structural and acoustic modes work together to affect noise transmission. A main result is a large transmission peak around 18 Hz at a critical pivot point (Point D) when the excitation comes from certain directions, showing strong directional sensitivity.

Experimental validation showed that the difference between simulated and measured responses, including the pivot noise transfer functions (NTFs), stayed within 15%. M.Tech students can use this framework as a solid reference for structural‑acoustic modeling, transfer‑path analysis, and validation in heavy‑machine design. We help students build their simulation models, set boundary conditions, and create comparative validation frameworks using the published parameters.

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