Soil-cutting simulation and parameter optimization of handheld tiller's rotary blade by Smoothed Particle Hydrodynamics modelling and Taguchi method

Li, Shoutai; Chen, Xiaobing; Chen, Wei; Zhu, Shiping; Yun-wu, LI; Yang, Ling; Xie, Shaojun; Yang, Mei

doi:10.1016/j.jclepro.2017.12.228

Cited by 34 publications

(15 citation statements)

References 15 publications

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“…To study movement of soil particle B after leaving the surface of the soil guide, we shall use the theory of flight of a body thrown at angle γ to the horizon (Figure 2). Disregarding air resistance, let us write the equation of movement of soil particle B as follows [13][14][15]: where v ୭ − is the initial flight speed of soil particle B at a specific moment in time t = 0, m/s; γ − and v ୭ is the angle of inclination of speed to the horizon, degrees. Initial flight speed v ୭ of soil particle B at a moment in time is determined t = 0 using the expression:…”

Section: Methods and Methodsmentioning

confidence: 99%

Determining the speed of soil particles during the covering of set onion with a disk-type working element featuring a soil guide

et al. 2021

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In Russia, the major share of vegetable products is produced during the period of March to August. This is due to the inadequate volumes of vegetables fit for long-term storage, and the use of technologies of early production of vegetable cultures. Apart from the above, vegetable farming is highly dependent on imported seed stock. In view of the above, import phaseout and improvement of competitiveness of vegetable cultures in Russia should focus on the development of technologies of production of storable products, as well as on methods of early harvesting of vegetables (during the period of May to July). With regards to the production of bulb vegetables, this problem may be solved by expanding industrial cultivation of onions from set onions, as well as planting of both seeds and seedlings during the autumn season. In particular, techniques of production of set onion, bulb onion from seedlings, and of blackseed onion have poor scientific and methodological background. This deficiency results in a gap between domestic and international process and engineering aspects. This calls for the development and introduction of machines designed for production of onion from seedlings that would be in line with the modern level of development of farm machinery industry for vegetable production.

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Section: Methods and Methodsmentioning

confidence: 99%

Determining the speed of soil particles during the covering of set onion with a disk-type working element featuring a soil guide

et al. 2021

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“…Soil is a three-phase porous mixture composed of solid particles, liquid water, and air [1][2][3]. Studying the interaction between soil and tillage tools significantly affects the tillage resistance and work quality of agricultural machinery and is, thus, evaluated in designing and optimizing tillage machines [4][5][6]. However, the tillage process is very complicated due to the complexity of soil physical composition [7], dynamic factors of tillage machinery [8], and adhesion and fragmentation of soil particles [9].…”

Section: Introductionmentioning

confidence: 99%

Effects of moisture content and tillage methods on creep properties of paddy soil

et al. 2021

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The rheological properties parameters of paddy soil affect the interaction between the tillage tools and soil, thus influencing the operation quality and power consumption. In order to study the effects of tillage methods and moisture content on the rheological properties parameters of paddy soil in the middle and lower reaches of the Yangtze River, uniaxial compression creep tests of paddy soils with four moisture contents under no tillage (moisture contents: 26.71%, 24.52%, 23.26%, 21.28%) and plough tillage (moisture contents: 26.77%, 25.55%, 23.40%, 20.56%) were carried out using a TMS-PRO texture analyzer. The creep properties curves obtained from the tests, and the rheological constitutive equation of paddy soil under compression was established by Burgers viscoelastic model. Respectively, the quantitative change rules of creep properties of paddy soil with different moisture contents under different tillage methods and the correlation between these parameters were explored. The results showed that the moisture content under the three-year plough tillage and no tillage methods had significant influence on the rheological properties parameters of paddy soil (P < 0.05). The instantaneous elastic modulus, delay elastic modulus, and viscosity coefficient of the two paddy soils (no tillage and plough tillage soils) decreased with the increase of moisture content. However, the variation rules of relaxation time and delay viscosity coefficient with moisture content differed between these two paddy soils. Specifically, the strain rate of the two paddy soils decreased as moisture content decreased, where the total strain combines elastic strain, viscous strain, and viscoelastic strain. The initial strain rate and steady strain rate of the plough tillage paddy soils were lower than that of the no tillage paddy soils. The established creep model equation could be used to obtain viscoelastic rheological parameters of paddy soil in a wide range. The fitting equations between rheological parameters and moisture content were introduced into Burgers model, and the coupling equations between creep deformation and moisture content and time were derived, which could be used to predict the creep properties and deformation behavior of paddy soil in a certain range of no tillage and ploughed field. Overall, this study has a certain theoretical significance for the development and improvement of paddy soil rheology theory, and can also provide theoretical basis and technical support for the research of agricultural machinery design optimization, field water, soil conservation, soil tillage and compaction related simulation analysis in the middle and lower reaches of the Yangtze River.

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“…Soil cutting process was simulated by SPH and the Taguchi method to optimize the rotary blade. The bending point, alpha angle, and bending angle were considered as control factors, and power consumption was the evaluation index [10].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Performance of a Combined Tillage Implement with Plough and Rotary Tiller by Experiment and DEM Simulation

Heng

Zheng

et al. 2021

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In order to improve the performance of tillage tool for straw incorporation in silty clay loam, a combined tillage implement with plough and rotary tiller was designed. Its performance on straw incorporation and power consumption was investigated, and the combined tillage types (CTSR and CTDR) were compared with traditional tillage types including a sole plough type (SP and DP), a sole rotary tiller (RT), and a two-pass tillage type (SP+RT and DP+RT) in a rice field experiment. The effect of the forward speed and rotary speed for RT and CTSR were studied by DEM simulation. The ratio of straw coverage by CTSR and CTDR increased nearly 20% compared with RT, and the stability coefficient of tillage depth and CV of the surface evenness after tillage also improved in the field experiment. The total power of CTSR and CTDR was less than that of RT and two-pass tillage types by measurement. DEM simulation indicated that the total power of CTSR increased with the increase of the forward speed and rotary speed, and the reduction of the rotary power for the combined tillage implement can be obtained at a relatively high rotary speed. The combined tillage implement improved the performance on straw incorporation and had an advantage on power consumption at some operational conditions.

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Soil-cutting simulation and parameter optimization of handheld tiller's rotary blade by Smoothed Particle Hydrodynamics modelling and Taguchi method

Cited by 34 publications

References 15 publications

Determining the speed of soil particles during the covering of set onion with a disk-type working element featuring a soil guide

Determining the speed of soil particles during the covering of set onion with a disk-type working element featuring a soil guide

Effects of moisture content and tillage methods on creep properties of paddy soil

Evaluation of the Performance of a Combined Tillage Implement with Plough and Rotary Tiller by Experiment and DEM Simulation

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