魏道高,胡美玲,马倩,区颖刚.含轴裂纹甘蔗切割器系统非线性动力学特性分析[J].农业机械学报,2013,44(Supp2):80-85.
Wei Daogao,Hu Meiling,Ma Qian,Ou Yinggang.Nonlinear Dynamic Characteristics of Sugarcane Cutter System with Cracked Shaft[J].Transactions of the Chinese Society for Agricultural Machinery,2013,44(Supp2):80-85.
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含轴裂纹甘蔗切割器系统非线性动力学特性分析   [下载全文]
Nonlinear Dynamic Characteristics of Sugarcane Cutter System with Cracked Shaft   [Download Pdf][in English]
  
DOI:10.6041/j.issn.1000-1298.2013.S2.016
中文关键词:  甘蔗 切割器 斜裂纹 非线性切割力
基金项目:华南农业大学南方农业机械与装备关键技术重点实验室开放基金资助项目(KF200707)和国家自然科学基金资助项目(51050002)
作者单位
魏道高 合肥工业大学机械与汽车工程学院 
胡美玲 合肥工业大学机械与汽车工程学院 
马倩 合肥工业大学机械与汽车工程学院 
区颖刚 华南农业大学南方农业机械与装备关键技术重点实验室 
中文摘要:将切割器简化成铅垂悬臂转子-支承系统,将斜裂纹设置在轴与盘身连接处附近,考虑裂纹与切割力2种非线性因素建立了该系统的3自由度动力学方程。基于该模型,选用开斜裂纹刚度计算模型,对含斜裂纹的甘蔗切割器动力特性进行数值计算与分析。结果表明,系统在含裂纹与无裂纹时相比刀盘轴心轨迹及其频率成分有显著不同;刀盘轴转速为800 r/min时,随裂纹深度增加,轴心轨迹形状变化较大,对应的进动幅值呈递增趋势。
Wei Daogao  Hu Meiling  Ma Qian  Ou Yinggang
School of Mechanical and Automotive Engineering, Hefei University of Technology;School of Mechanical and Automotive Engineering, Hefei University of Technology;School of Mechanical and Automotive Engineering, Hefei University of Technology;Key Laboratory of Key Technology on Agricultural Machine and Equipment, Ministry of Education, South China Agricultural University
Key Words:Sugarcane CutterSlant crack Nonlinear cutting force
Abstract:The cutter was simplified to a vertical over-hung rotor-bearing system. The slant crack was set near the junction of shaft and disk, only considering two nonlinear factors: the slant crack and the nonlinear cutting force. 3-DOF dynamic equations of the system were founded. Based on this model, a stiffness calculation model of opening slant crack was chosen and the dynamic characteristics of slant cracked cutter were investigated by numerical simulation. The results showed that, when the system was under the action of crack, the orbit of the shaft center and frequency components of the cutter were significantly different from that without the crack. When n was 800 r/min, as the crack depth increased, the shapes of orbit of the shaft center varied comparatively great and the corresponding displacement amplitudes tended to increase.

Transactions of the Chinese Society for Agriculture Machinery (CSAM), in charged of China Association for Science and Technology (CAST), sponsored by CSAM and Chinese Academy of Agricultural Mechanization Science(CAAMS), started publication in 1957. It is the earliest interdisciplinary journal in Chinese which combines agricultural and engineering. It always closely grasps the development direction of agriculture engineering disciplines and the published papers represent the highest academic level of agriculture engineering in China. Currently, nearly 8,000 papers have been already published. There are around 3,000 papers contributed to the journal each year, but only around 600 of them will be accepted. Transactions of CSAM focuses on a wide range of agricultural machinery, irrigation, electronics, robotics, agro-products engineering, biological energy, agricultural structures and environment and more. Subjects in Transactions of the CSAM have been embodied by many internationally well-known index systems, such as: EI Compendex, CA, CSA, etc.

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