Dynamic analysis for the thresher of a combined harvester subjected to stalk winding
Source abstract
Abstract
In this paper, the whirl characteristics and instability of the thresher in a combined harvester subjected to stalk winding are investigated. Using the spinning Timoshenko beam assumptions, the governing equations of motion for the thresher-stalk system are obtained via Hamilton’s principle. Considering the elastic end supports, the exact and approximated dimensionless whirl frequency equations are derived. On the basis of the obtained formulas, both whirl characteristics and stability of the thresher-stalk system are investigated numerically, and the validation of the present analysis is conducted by comparing with the results available in the literature. In addition, the effects of mode number, mass ratio, eccentric distance, shear deformation, and slenderness ratio on the critical spinning speed, stability, and instability boundary are deeply discussed. The results show that the whirl characteristics and stability of the thresher-stalk system are strongly dependent on the stalks wound around the thresher.
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Research context
OpenAlex topics: Vibration and Dynamic Analysis · Structural Analysis and Optimization · Mechanical stress and fatigue analysis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Engineering, Anhui Agricultural University 1 , Hefei 230036, China
Anhui Province Engineering Laboratory of Intelligent Agricultural Machinery and Equipment 2 , Hefei 230036, China
Institute of Applied Mechanics, College of Science, Northeastern University 3 , Shenyang 110004, People’s Republic of China
Funding
National Natural Science Foundation of China · University Natural Science Research Project of Anhui Province · Natural Science Foundation of Anhui Province · Anhui Agricultural University
References (32)
Show source-provided references
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