| The kinetic parameter identification of the rubber belt is the basic problem of belt conveyor about the dynamic design and energy-saving operation control.Taking the ordinary rubber belt with the steel rope core as the research object,the dynamic characteristics and the deformation resistance force of the belt are studied in the paper by combining the theoretical modeling,the virtual simulation and the experiment validation.The contents of the paper are as the follows:Based on the differential geometry theory and the space coordinate transformation theory,the parameter equation of the central line of the steel rope is derived.Taking the ordinary rubber belt with the steel rope core as the example and the conveyor belt St1600 as the reference of the structure parameter,the meso models of the double-spiral steel rope,the rubber cover and the conveyor belt are established by employing Pro/E software,which provides the base of the next research on the dynamics characteristics and the deformation resistance force.Due to the complexity of the physical characteristics of the rubber belt with the steel rope core,the strain responses between the wire and wire,the rope and rope,and the rubber cover itself under the sinusoidal load are simulated by employing Solid164 unit,Mooney-Rivlin unit and Bilinear Isotropic unit of LS-DYNA software,and the stiffness characteristics and the damping characteristics of the rubber belt are derived based on the simulation result.The stress responses of the rubber belt with steel rope core under 0 ?,10 ?,20 ?,30 ?and 40 ? are analyzed by employing the dynamic loading stress experiment.Based on the constitutive model of the belt standard solid,the identification equations of the stiffness and damping for the belt three-element standard solid are derived by the Fourier series fitting method for the viscoelastic material,and the fitting equations with the temperature variation for the stiffness and damping of belt are established,and the variation performances with the temperature for the kinetic parameters of belt are analyzed.Due to the complexity of the spatial structure and the force condition of the steel core,the equivalent elastic modulus equation of the double-spiral steel rope is predicted based on the differential geometry theory and the statics.Taking the double-spiral steel rope as the research object,the equivalent elastic modulus is computed,and the comparison between the computation result and the practical measured elastic modulus achieved by the tension experiment using universal tension machine,which provides the theory base for the model simplification of the rubber belt with the steel rope core.Based on the sufficient study of the principles of the pressing resistance force and the bending resistance force,the testing system composed of the pressing roller,the supporting roller and the traction guiding plate and the virtual model composed of the conveyor belt,the supporting roller and the pressing roller are established by using Pro/E software.Based on the analysis of the equivalent elastic modulus of the steel rope,the research on the pressing resistance force and the bending resistance force is carried out by employing ANSYS software.Based on the above study,the method taking the steel wire net as the framework of the rubber conveyor belt is presented by the paper,and the meso 3D parametric model of the belt is established,which provides a new method for the development of the new rubber conveyor belt and solving the longitudinal rip of the conveyor belt. |
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