Mechanical characteristic analysis of rice seedlings under water wave stress
Keywords:
agricultural engineering, floating rice seedlings, water wave stress, computational fluid dynamics, Volume of FluidAbstract
Machine transplanting as an advanced technology in rice cultivation has been widely adopted. Nevertheless, under extreme wind conditions, transplanted rice seedlings can float and then die off due to external forces generated by wind and water waves. Studying the mechanical characteristics of these seedlings is essential for understanding the underlying mechanisms of rice seedling floating. In this study, the Volume of Fluid (VOF) method is applied to study the flow mechanisms of water waves around rice seedlings. It is found that the pressure differential between the windward and leeward wave sides of the rice seedlings changes during wave diffraction, resulting in unsteady drag forces. The drag force reaches its maximum value when the wave crest propagates to the rice seedlings. Under the condition where waves do not break, increasing wave height does not alter the fluctuation pattern of drag force but leads to a larger drag force amplitude. When the wave height increases sufficiently to cause wave breaking, additional loads are generated, resulting in a significant increase in drag amplitude and exciting new high-frequency disturbances. Increasing wavelength reduces the drag force amplitude but raises its fundamental fluctuation frequency and introduces new low-frequency pulsations. As the rice seedlings tilt, the altered flow mechanism has an uncertain effect on the variation in drag force amplitude and generates new excitations with other frequencies. It indicates that increased wave height, decreased wavelength, and rice seedling inclination may all elevate the risk of rice seedlings lodging. These results could provide valuable references for the prevention of floating rice seedlings.
Keywords: agricultural engineering, floating rice seedlings, water wave stress, computational fluid dynamics, Volume of Fluid
DOI: 10.25165/j.ijabe.20261903.10305
Citation: Li L H, Zhu C H, Chang F Z, Liu B X, Xu L C. Mechanical characteristic analysis of rice seedlings under water wave stress. Int J Agric & Biol Eng, 2026; 19(3): 70–79
References
[1] Jadid N, Octafiani V, Saputro T B, Purwani K I, Adiredjo A L, Roviq M, et al. A review of rice cultivation and cultivar development for high adaptability to global climate change. Journal of Crop Science and Biotechnology, 2025; 28（6）, 715–726
[2] Muthayya S, Sugimoto J D, Montgomery S, Maberly G F. An overview of global rice production, supply, trade, and consumption. Annals of the New York Academy of Sciences, 2015; 1324（1）: 7–14.
[3] Tang H, Jiang Y M, Xu C S, Zhou W Q, Wang Q, Wang Y J. Experimental study on the correlation between hill direct seeding rate and field seedling rate of typical rice varieties in cold areas. Int J Agric & Biol Eng, 2021; 14（5）: 63–71. DOI: 10.2516 5/j.ijabe.2021140 5.6020.
[4] Chen Z W, Gu J L, Yang X F. A novel rigid wheel for agricultural machinery applicable to paddy field with muddy soil. Journal of Terramechanics, 2020; 87: 21–27.
[5] Zhou M L, Yang Y C, Wei M X, Yin D Q. Method for generating non-circular gear with addendum modification and its application in transplanting mechanism. Int J Agric & Biol Eng, 2020; 13（6）: 68–75.
[6] Tan S Y, Ma X, Qi L, Li Z H. Fast and robust image sequence mosaicking of nursery plug tray images. Int J Agric & Biol Eng, 2018; 11（3）: 197–204. DOI: 10.25165/j.ijabe.201 81103.2919.
[7] Xiao J Q, Ma R J, Chen Y. Effects of test levels on creep and relaxation characteristic parameters of stem for rice seedlings grown in plastic cell tray. Int J Agric & Biol Eng, 2020; 13（4）: 19–28.
[8] Wang L, Sun L, Huang H M, Yu Y X, Yu G H. Design of clamping-pot-type planetary gear train transplanting mechanism for rice wide–narrow-row planting. Int J Agric & Biol Eng, 2021; 14（2）: 62–71.
[9] Thomas E V. Development of a mechanism for transplanting rice seedlings. Mechanism and Machine Theory, 2002; 37（4）: 395–410. DOI: 10.1016/S 0094-114X（01）00071-4.
[10] Jia X, Li Y L, Song J N, Liu C L, Cao X L, Chen L C, Cheng L P. Effects of different machine transplanting methods on the physiological and yield characteristics of late rice in China. Int J Agric & Biol Eng, 2023; 16（6）: 37–47. DOI: 10.25165/j.ijabe.202 31606.7764.
[11] Shamshiri R R, Ibrahim B, Balasundram S K, Taheri S, Weltzien C. Evaluating system of rice intensification using a modified transplanter: A smart farming solution toward sustainability of paddy fields in Malaysia. Int J Agric & Biol Eng, 2019; 12（2）: 54–67.
[12] Agusta H, Santosa E, Dulbari, Dulbariguntoro D Z S. Continuous heavy rainfall and wind velocity during flowering affect rice production. Journal of Agricultural Science, 2022; 44（2）: 290–302. DOI: 10.17503/agrivita.v 44i2.2539.
[13] Dulbari D, Santosa E, Koesmaryono Y, Sulistyono E, Guntoro D. Local adaptation to extreme weather and its implication on sustainable rice production in Lampung, Indonesia. AGRIVITA Journal of Agricultural Science, 2020; 43（1）: 125–136.
[14] Zhao Y, Liu Z P, Xin L, Zhou M L, Wang J. Optimization design and experiment of transplanting mechanism of rice pot seedling on film. Transactions of the CSAM, 2018; 49（4）. DOI: 10.6041/j.issn.1000-1298.2018.04.010.
[15] Tian Y Y, Gong H, Feng X, Cai Y H, Zeng Z W, Qi L. Development of a model to predict the throwing trajectory of a rice seedling. Computers and Electronics in Agriculture, 2023; 211: 108025. DOI: 10.1016/j.compag.2 023.108025.
[16] Yin J J, Wan Z L, Zhou M L, Wu L N, Zhang Y. Optimized design and experiment of the three-arm transplanting mechanism for rice potted seedlings. Int J Agric & Biol Eng, 2021; 14（5）: 56–62.
[17] Xu L C, Liu Z X, Li X J, Zhao M, Zhao Y J, Zhou T. Dynamic mode characteristics of flow instabilities in a centrifugal compressor impeller. Aerospace Science and Technology, 2023; 142: 108707. DOI: 10.1016/j.a st.2023.108707.
[18] Zhao M, Xu L C, Li X J, Zhao Y J, Liu Z X. Dynamic stall of pitching tubercled wings in vortical wake flowfield. Physics of Fluids, 2023; 35（1）: DOI: 015122. 10.1063/5.0134109.
[19] Hu X D, Li H F, Wu H, Long B, Liu Z J, Wei X, Li J Y. Modeling the kinematic response of rice under near-ground wind fields using the finite element method. Agronomy, 2023; 13: 1178. DOI: 10.3390/agronomy 13041178.
[20] Ni M, Wang H J, Ding Y J, Yang L. Research of rice lodging in farmland wind field based on CFD. 2019 International Conference on Computer Network, Electronic and Automation （ICCNEA）, 2019: 57–61. DOI: 10.1109/ICCNE A.2019.00021.
[21] Mo W H, Irschik K, Oumeraci H, Liu P L F. A 3D numerical model for computing non-breaking wave forces on slender piles. Journal of Engineering Mathematics, 2007; 58: 19–30. DOI: 10.1007/s10665-0 06-9094-6.
[22] Li L H, Qin W H, Xu L C, Zhu C H, Liu B X. Mechanical characteristics of rice seedlings under wind stress. Int J Agric & Biol Eng, 2025; 18（6）: 33–40. DOI: 10.25165/j.ijabe.20 251806.9907
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