DYNAMIC ANALYSIS OF BRANCH SHAKING MACHINES VIA MULTI-DOF MODELING
Öz
In this study, the dynamic behavior of different types of branch shaking machines equipped with slider–crank mechanisms were investigated through a comparative approach. The systems were considered within a common kinematic framework and represented using a reduced single-axis model with three degrees of freedom along the dominant direction of motion. This modeling approach enabled a consistent comparison of different configurations while maintaining the essential dynamic characteristics of the system. Within this framework, the angular motion transmitted through the flexible shaft was converted into linear oscillatory motion via the slider–crank mechanism, and system interactions were represented using equivalent mass–spring–damper–friction elements. Different equipment configurations were evaluated based on whether the engine was externally mounted or integrated, as well as the positioning of the slider–crank mechanism relative to the operator or the branch. Simulation results were analyzed in terms of reaction forces transmitted to the user and displacement responses. The findings indicate that flexible shaft systems provide lower force transmission and improved user comfort, whereas configurations with the mechanism closer to the operator produce higher vibration amplitudes. Overall, the reduced modeling approach proved to be an effective tool for the rapid and comparative evaluation of alternative designs.
Anahtar Kelimeler
Vibration–based harvesting, Branch shaking machines, Slider–crank mechanism, Multi-DOF modeling, Dynamic analysis
Kaynakça
- Adewusi, S., Rakheja, S., & Marcotte, P. (2012). Biomechanical models of the human hand-arm to simulate distributed biodynamic responses for different postures. International Journal of Industrial Ergonomics, 42(2), 249-260. https://doi.org/10.1016/j.ergon.2012.01.005
- Ausserer, J. K., Polanka, M. D., Baranski, J. A., Grinstead, K. D., & Litke, P. J. (2017). Measurement of loss pathways in small, two-stroke internal-combustion engines. SAE International Journal of Engines, 10(2), 128-143. https://doi.org/10.4271/2017-01-9276
- Beňo, P., Marienčík, J., Turis, J., Kozak, D., & Konjatić, P. (2016). The friction factor dependence on the load and revolutions in sliding bearings without relubrication. Tehnički vjesnik, 23(4), 997-1001. https://doi.org/10.17559/TV-20140908114234
- Castro-Garcia, S., Blanco-Roldán, G. L., Gil-Ribes, J. A., & Agüera-Vega, J. (2008). Dynamic analysis of olive trees in intensive orchards under forced vibration. Trees, 22(6), 795-802. https://doi.org/10.1007/s00468-008-0240-9
- Cetinkaya, C., Polat, R., & Ozalp, A. F. (2022). Investigation of the vibration effect of using single or double eccentric mass in the trunk shakers used in fruit harvesting. Engineering Science and Technology, an International Journal, 35, 101228. https://doi.org/10.1016/j.jestch.2022.101228
- Chen, Y., Qin, C., Zhou, H., Xu, Z., Xu, A., & Li, H. (2024). Damping characteristics of a novel bellows viscous damper. Sensors, 24(19), 6265. https://doi.org/10.3390/s24196265
- Das, S. (2021). Modeling for hybrid and electric vehicles using simscape. Morgan & Claypool Publishers. https://doi.org/10.1007/978-3-031-01508-3_2
- De Langre, E. (2019). Plant vibrations at all scales: a review. Journal of Experimental Botany, 70(14), 3521-3531. https://doi.org/10.1093/jxb/erz209
- Deng, B., Wang, X., Wang, K., Song, H., Gao, S., Tu, Y., & Zhang, X. (2025). Analysis of energy transfer characteristics in multi-level branches of Lycium barbarum L. under vibration excitation. Computers and Electronics in Agriculture, 239, 110992. https://doi.org/10.1016/j.compag.2025.110992
- Dobry, M. W., & Hermann, T. (2015). Differences in energy flow in three directions in Human-Tool biomechanical systems based on spatial human physical models specified in the ISO 10068: 2012 standard. Journal of Theoretical and Applied Mechanics, 53(4), 789-798. https://doi.org/10.15632/jtam-pl.53.4.789