| Pointed at vibration of high-speed winder chuck shaft,it was abated by optimizing characteristic parameter, The mechanism dynamic properties was major obtained by Modal analysis, the maximum rotation rate is12000r/min for chuck shaft, because of working frequency range is extremely wide, that is easy to cause resonance. at first, For the whole system of domestic high-speed winder in theory, the use of mathematical modeling, the mass distribution, stiffness distribution and damping distribution were respectively represented for mass matrix, stiffness matrix and damping matrix, then, depending on the geometry shape of the structure, boundary conditions and material properties, differential equations of the vibration system was resolved to the equation eigenvalue, the natural frequencies of the high speed winder could be obtained, each feature value was corresponding to a set of feature vectors, that was vibration model of high-speed winder structure, using Pro/e to establish a three-dimensional model, it was conducted modal analysis in theory for high speed winder grooved roller, pressure wire roller and the chuck shaft by imported Ansysworkbench finite element analysis software. It could obtain system natural frequency and corresponding to the vibration mode in the restraint state and the free state, the displacement value of chuck shaft deformation, comparison the free state the natural frequency to the restraint state, obtained accurate chuck shaft natural frequency. it could obtain the force deformation nephogram of the chuck shaft in the full load by Static analysis of chuck shaft full volume case, determine the maximum position of high-speed winder chuck shaft elastic deformation.Experimental modal analysis is multi-input and single-output experimental modal analysis method, the stimulate signal is impulse, it gets the response signal with acceleration transducer., the first four modal frequency was analyzed by DH5920dynamic test and modal analysis system for the static chuck shaft system in the free state and constraints. Free state will put the chuck shaft on plastic foam, so that it had as many degrees of freedom, it could be easier to obtain more accurate experimental modal frequencies by using the hammer to shock a chuck shaft, it obtained experimental modal frequencies by using the same modal test methods in Rack constraints, The modal frequencies in the two states were compared, it could be obtained an accurate experimental modal frequency based on experience, the groove roller caused the acceleration signal of the rack was Tested by the real-time spectrum analysis of the signal under different working number of revolutions, obtained the vibration amplitude of the different multiplier frequencies in the resonance speed of the grooved roller, the maximum amplitude frequency corresponding to the rotational speed of the chuck shaft was key point to damage and influence winding quality. analysis of experimental test data, after frequency response function analysis, identification of modal parameters, it could be got dynamic parameters of the domestic high-speed winder chuck shaft. We could use these parameters to be optimized to the dynamics of the system, changed the structural characteristics of the system, thereby preventing the winder to generate forced vibration.This text also analyses the weak link of the chuck shaft system impacting the machining quality. It has importance significance to advance chuck shaft dynamic characteristics. Then this text compared the natural frequency of the experimental modal analysis and theory analysis. From this, we provided a reliable basis for improving chuck shaft structural, opened up application in other industries. |
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