Research On The Sugarcane-Soil System Simulation Model

At present, the domestic and foreign research on the cutting system of sugarcane harvest machinery mainly concentrates on the cutting damage, cutting energy,affecting factors on the rate of broken biennial root, optimization design of cutter and cutting kinematics simulation of sugarcane.There is no any report about the simulation model research of sugarcane-soil system,but it has important significances an practical calues to establish the simulation model of sugarcane-soil system for cutting dynamics simulation research and instructing the indoor test of sugarcane cutting simulation .In the paper, taking the Taiwan sugarcane 22# and the paddy soils as the object of study, the density, stalk yield stress of sugarcane, the elastic modulus of sugarcane core and sugarcane periderm are obtained by using the physical testing method.Through the field vibration test and using vibration attenuation method,the vibration acceleration curve of sugarcane and the sugarcane - soil system is obtained ,and the correlation analysis between them is carried out . The simulation model of sugarcane-soil system is established with the finite element analysis software ANSYS/LS-DYNA, and based on the Original physical parameter, reverse simulation tests are repeated by amending its physical parameter with Orthogonal experimentation and systematic parameter reverse technique to obain the simulation vibration acceleration curve.And then, contrast analysis of acceleration curve is carried out between the simulation and the experimental results to obain the parameters in the simulation test which approaches with the actual sugarcane physical property parameters.According to the System parameters provided by the simulation model, the sponge rubber plate and the spongy rubber brings are used to simulate the enclasping effects of hard soil and soft soil on the sugarcane, and then a device is designed and the physical verification is carried out.The results show that: the average density of sugarcane periderm is 1067kg/m~3, the average of elastic modulus is 194.07MPa, the average of sugarcane core is 41.75Mpa, the breaking stress average of sugarcane stem is 15.34Mpa; The sugarcane and soil stuff are plasticity following model.The parameters for the density of sugarcane is 1067 kg/m~3, the elastic modulus is 1.00 E8Pa, the poisson's ratio is 0.4, the yield stress is 1.50 E7Pa, the tangent modulus is 1.80 E5Pa, the strain rate (c) is 100, the strain rate (p) is 10, and damping is 2; The corresponding parameters of the soft soil is 1910 kg/m~3, 1.00E6 Pa, 0.4, 8.00E5 Pa, 1.00E5 Pa, 41, 6, 0.8, 2.2 respectively; and the corresponding parameters of the hard soil is 1850 kg/m~3, 1.50E6 Pa, 0.35, 8.50E4 Pa, 1.20E5 Pa, 38, 5, 0.7, 2 respectively; the simulation model of sugarcane and sugarcane-soil system are credibility which could be applied in dynamics simulation study of sugarcane cutting and the indoor simulated cutting test of sugarcane; the sponge rubber materials could be used as materials for simulating the enclasping effects of soil on sugarcane, and the tension devices could be used in the indoor simulated cutting test of sugarcane.