张卫国,权龙,程珩,杨敬.真实载荷驱动下挖掘机工作装置疲劳寿命研究[J].农业机械学报,2011,42(5):35-38,105.
Zhang Weiguo,Quan Long,Cheng Hang,Yang Jing.Fatigue Analysis on Working Device of Excavator Driven by Practical Load[J].Transactions of the Chinese Society for Agricultural Machinery,2011,42(5):35-38,105.
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真实载荷驱动下挖掘机工作装置疲劳寿命研究   [下载全文]
Fatigue Analysis on Working Device of Excavator Driven by Practical Load   [Download Pdf][in English]
  
DOI:10.3969/j.issn.1000-1298.[year].[issue].[sequence]
中文关键词:  挖掘机  工作装置  真实载荷  动力学仿真  疲劳分析
基金项目:国家自然科学基金资助项目(950775156)和浙江大学流体及控制国家重点实验室开放基金资助项目(GIKF-2008006)
作者单位
张卫国 太原理工大学 
权龙 太原理工大学 
程珩 太原理工大学 
杨敬 太原理工大学 
中文摘要:由于挖掘机挖掘作业过程中真实载荷非常复杂,提出采用试验与动力学仿真相结合的方法进行分析,以实验室现有6t小型挖掘机为研究对象,用压力传感器和位移传感器测试挖掘过程中各液压缸压力随位移的变化情况,然后把各液压缸的位移变化过程作为驱动,用ADMAS软件对挖掘过程进行动力学仿真,获得挖掘过程中工作装置各铰销点的工作载荷,再应用MSC.Fatigue软件对工作装置进行疲劳分析,获得工作装置大臂和斗杆的寿命云图,分析表明,大臂和斗杆的应力集中区域疲劳寿命最短,最小寿命计算值为13年,研究结果为工作装置结构设计提供了理论依据。
Zhang Weiguo  Quan Long  Cheng Hang  Yang Jing
Taiyuan University of Technology;Taiyuan University of Technology;Taiyuan University of Technology;Taiyuan University of Technology
Key Words:Excavator, Working device, Practical load, Dynamics simulation, Fatigue analysis
Abstract:As the practical load is very complicated during the digging process of excavator, an analysis method of combining experiment with the dynamics simulation was suggested. With laboratory 6 t mini excavator as the research object, pressure sensors and displacement sensors were used to measure the changing of pressures by hydraulic cylinders displacement during digging. With each cylinder displacement curve as the driving element, ADMAS software was used to simulate the dynamics performance of digging process. The working loads of articulated points of the working device were obtained through simulation. The life contours of boom and arm were obtained by the fatigue analysis of the working device with software MSC. Fatigue. It showed that the fatigue life was the shortest in the stress concentration area of boom and arm, and the calculating value was 13 years. The research results can provide theory basis for the structural design of working device.

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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