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Yang W.,Guangxi University | Yang J.,Guangxi University | Yang J.,Guangxi Key Laboratory of Manufacturing System and Advanced Manufacturing Technology | Ruan H.,Guangxi University | And 2 more authors.
Applied Mechanics and Materials | Year: 2013

The seeder of rice bud-seed for field seedling raising is a new seedling equipment for field seedling raising, which is a complicated vibration system with multi-freedom. And the effect of the vibration parameters and interactions on the vibration velocity at different locations of the moving rail of two electromagnetic vibration metering devices which are installed side by side is large, and the passing rate of seeding is affected. In this paper, the virtual prototype of seeder of rice bud-seed for field seedling raising is established by ANSYS and ADAMS. The virtual prototype is developed to carry out dynamics simulation by using four-factor quadratic regression orthogonal rotary combination design. Mathematical models of influencing factors of vibration and variation coefficient of vibration velocity, and the factors and average velocity of seeding are established. The factors are optimized. And optimal combination of vibration influencing factors and the variation coefficient of vibration velocity interval with 95% reliability are achieved. The result shows that optimal combination of factors is achieved under the condition that the excitation force amplitude is 39.8N, vibration frequency is 32.7Hz, the velocity is 58.5mm/s, stiffness of vibration isolating rubber pad is 1167N/mm. The corresponding variation coefficient of the vibration velocity is 6.287%, and the average seeding velocity is 18mm/s. The variation coefficient of the vibration velocity interval with 95% reliability is from 2.909% to 9.665%. © (2013) Trans Tech Publications, Switzerland. Source


Zhou S.,Guangxi University | Yang W.,Guangxi University | Yang J.,Guangxi University | Liang Z.,Guangxi Research Institute of Agricultural Machinery | Mo J.,Guangxi Research Institute of Agricultural Machinery
Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery | Year: 2011

By using explicit dynamic simulation software ANSYS/LS-DYNA, the sugarcane-cutter system dynamics simulation model was established. The precision of the simulation model was verified by physical experiment. By using four-factor of second order general rotation composite design and the sugarcane-cutter system dynamics simulation model, the dynamics simulation of one-blade cutting sugarcane was carried out. The mathematical model of the influencing factors, cutting forces and shear stresses was established. The influence law of the factors and their interaction were analyzed, and the respective optimization of the factors was gained. The optimal cutting force interval with 95% reliability was obtained. The results showed that when knife-edge angle of blade is 17.5°, cutting angle of blade is 27.73°, obliquity of disc cutter is 28° and cutting velocity is 16 m/s, the optimal cutting force interval with 95% reliability is from 235.82 N to 297.98 N. Source


Yang W.,Guangxi University | Yang J.,Guangxi University | Liu Z.,Guangxi University | Liang Z.,Guangxi Research Institute of Agricultural Machinery | Mo J.,Guangxi Research Institute of Agricultural Machinery
Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering | Year: 2011

Sugarcane-cutter system dynamics simulation model was established and suitable material parameter model of sugarcane was obtained by using explicit dynamic simulation software ANSYS/LS-DYNA and inverse method. The precision of the simulation model was verified by physical experiment. Based on the establishment of soil-sugarcane-cutter system dynamics simulation model, dynamics simulation experiments were carried out and correlative mathematic models were built. The effects of soil soft-hard state on sugarcane maximum cutting force and broken biennial root was investigated. The results showed that the soil soft-hard state had more effective on sugarcane axial shear stress than that on sugarcane maximum cutting force. The maximum cutting force of two-blade cutting sugarcane is smaller than that of one-blade. The maximum force for cutting under the ground was larger than that for cutting over the ground, but the average axial shear stress for one-blade cutting under the ground was 43.3% less than that for cutting over the ground. Moreover, the average axial shear stress for two-blade cutting under the ground was 49% less than that for cutting over the ground. Cutting sugarcane under the ground could effectively reduce the rate of broken biennial root. Source

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