数字农科院2.0

ANALYSIS OF VIBRATION CHARACTERISTICS AND STRUCTURAL OPTIMIZATION OF THE CHASSIS FRAME OF CRAWLER-TYPE COMBINE HARVESTER [履带式联合收割机底盘机架振动特性分析与结构优化]

文献类型： 外文期刊

作者： Zihao Zhao;Chengqian Jin;Guangyue Zhang;Youliang Ni;Zhenjie Qian

作者机构：

关键词： chassis;static analysis;vibration characteristics;vibration velocity

期刊名称： INMATEH - Agricultural Engineering

ISSN： 2068-4215

年卷期： 2025 年 75 卷 1 期

页码：

收录情况： EI（2025版） ; ; ESCI（2025版）

摘要： To investigate the vibration characteristics of the Thinker Agricultural Machinery 4LZ-2.0 crawler-type combine harvester under operational conditions, vibration tests were conducted on the chassis frame at three different engine speeds: 2700 r/min, 1500 r/min, and 800 r/min. A static analysis was initially performed to identify regions of significant stress and deformation on the chassis frame, which guided the placement of measurement points for collecting vibration acceleration data. Subsequent processing of the acceleration data in the frequency domain revealed the variation in vibration velocity at each measurement point on the chassis frame. It was found that as the engine speed increased, the excitation frequencies from the vibrating screen and cutting platform appeared as dominant resonance frequencies at nine out of twelve measurement points on the chassis frame. By referencing the international standard ISO 20816, it was determined that most of these measurement points fell into Class D, indicating a high level of vibration severity. To mitigate the vibration of the chassis frame, two measures were implemented: enhancing the structural rigidity of the frame and reducing the area of the center of mass trajectory of the vibrating screen. Following these modifications, retesting showed that the average vibration intensity at the three maximum vibration measurement points of the chassis in the high engine speed condition successfully decreased by 34.57% compared to the original structure.

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