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Technologies and technical equipment for agriculture and food industry

Volume

Volume 76 / No. 2 / 2025

Pages : 964-977

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RESEARCH ON OPTIMIZATION OF VIBRATION EAR PICKING PARAMETERS BASED ON CORN PLANT VIBRATION RESPONSE CHARACTERISTICS AND FINITE ELEMENT ANALYSIS

基于玉米植株振动响应特性与有限元分析的激振摘穗参数优化研究

DOI : https://doi.org/10.35633/inmateh-76-83

Authors

Pengxuan GUAN

Shandong University of Technology

Yipeng CUI

Shandong University of Technology

Jianning YIN

Shandong University of Technology

Zehao ZHA

Shandong University of Technology

Qiming YU

Shandong University of Technology

(*) Duanyang GENG

Shandong University of Technology

(*) Corresponding authors:

dygxt@sdut.edu.cn |

Duanyang GENG

Abstract

To reduce maize ear damage caused by ear-picking rollers during maize harvesting and to improve ear-picking efficiency, this study investigates the vibration response characteristics of maize plants and conducts comprehensive experimental research.Current research on vibration ear-picking predominantly conducts on the structural design and parameter optimization of ear-picking mechanisms, with comparatively limited attention given to the dynamic response patterns of maize plants under vibrational excitation. Therefore, it is essential to conduct an in-depth investigation into the mechanical behavior and vibration response characteristics of maize plants during the maize ear detachment process. In this study, the mechanical behavior of ear-bearing maize plants during the vibration ear-picking process was first analyzed, and a theoretical model was established. The optimal acceleration range for low-damage and high-efficiency ear-plant separation was identified, and the key parameters affecting ear-picking performance—namely amplitude, frequency, and clamping position—were determined. Based on the slope algorithm and response surface methodology, combined with finite element analysis, this study quantitatively evaluates the influence of various vibration parameters on the acceleration score Sz at the ear-bearing region. A predictive model was established using a Box-Behnken experimental design, identifying the optimal parameter combination as an amplitude of 8 mm, a frequency of 18 Hz, and a clamping position of 106 mm. This model enables the quantitative analysis of excitation forces acting on the ear during the ear-picking process and provides a theoretical foundation for optimizing the structure of the excitation waveform, thereby offering valuable guidance for the subsequent optimization and design of vibration ear-picking systems.

Abstract in Chinese

为了减少玉米收获过程摘穗辊对果穗的啃伤,提升摘穗效果,本研究以玉米植株的振动响应特性为切入点,开展了相关试验研究。当前关于激振摘穗的研究多聚焦于摘穗机构结构与参数优化,而对玉米植株在激振条件下的动力学响应规律关注较少,故需深入探讨玉米植株在果穗分离过程中的力学行为变化规则与振动响应特性。本研究首先分析了激振摘穗过程中带穗植株的力学行为变化规则,建立了理论模型,明确了果穗-植株分离低损高效分离的加速度范围,确定了影响摘穗效果的关键参数:振幅、频率和夹持位置。基于斜率算法与响应面法,结合有限元分析,量化分析了不同激振参数对结穗处加速度得分Sz的影响。根据Box-Behnken设计试验建立预测模型,确定最优参数组合为振幅8mm、频率18hz、夹持位置106mm。该模型能定量分析摘穗过程中果穗的激振力,用于优化激振波结构,为后续激振摘穗的优化设计提供理论指导。

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