Response Prediction and Experimental Validation of Vibration Noise in the Conveyor Trough of a Combine Harvester

Jianpeng Jing, Guangen Yan, Zhong Tang (), Shuren Chen, Runzhi Liang, Yuxuan Chen and Xiaoying He
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Jianpeng Jing: College of Agricultural Engineering, Jiangsu University, Zhenjiang 212013, China
Guangen Yan: Xinjiang Production and Construction Corps Fourth Division Chuangjin Agricultural Development Group Co., Kokdala 835219, China
Zhong Tang: College of Agricultural Engineering, Jiangsu University, Zhenjiang 212013, China
Shuren Chen: College of Agricultural Engineering, Jiangsu University, Zhenjiang 212013, China
Runzhi Liang: College of Agricultural Engineering, Jiangsu University, Zhenjiang 212013, China
Yuxuan Chen: College of Agricultural Engineering, Jiangsu University, Zhenjiang 212013, China
Xiaoying He: College of Agricultural Engineering, Jiangsu University, Zhenjiang 212013, China

Agriculture, 2025, vol. 15, issue 10, 1-24

Abstract: The noise generated by combine harvesters during operation has drawn growing attention, particularly that of the conveying trough shell, whose noise generation mechanism remains unclear. This study investigated the vibration radiation noise characteristics of conveying troughs by analyzing a chain system with 83 links using numerical simulation and experimental validation. A dynamic model of the conveyor chain system was developed, and the time domain reaction force at the bearing support was used as excitation for the trough shell’s finite element model. Modal and harmonic response analyses were performed to obtain the vibration response, which served as an acoustic boundary input for the LMS Virtual Lab. The indirect boundary element method was used to compute the radiated noise, achieving coupled modeling of chain system vibration and trough shell noise. Simulation results revealed that the maximum radiated noise occurred at approximately 112 Hz, closely matching experimental data. Comparative analysis of transmitted noise at 500 Hz and 700 Hz showed acoustic power levels of 98.4 dB and 109.52 dB, respectively. Results indicate that transmitted noise dominates over structural radiation in energy contribution, highlighting it as the primary noise path. This work offers a validated prediction model and supports noise control design for combine harvester conveying troughs.

Keywords: agricultural machinery; vibration; noise; experiment; conveyor trough; conveyor trough shell; radiated noise (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2025
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