Abstract:

Yarn bundle vibration noise is one of the noise sources of tufted carpet loom. In order to identify the noise of the yarn bundle and realize the noise control of the carpet production environment, the transverse dynamic vibration characteristics of the yarn bundle of carpet loom were studied. Burger four-element constitutive model was applied to establish transverse vibration equation of axial motion of viscoelastic yarn bundle. Galerkin method was used to discretize the partial differential equations of lateral vibration, and then the Runge-Kutta method was used to solve this equation numerically. By setting different jacquard wheel speeds, respectively, the vibration equation was solved to acquir different transverse vibration frequency of yarn bundle. Under the same conditions as the simulation solution, the transverse vibration characteristics of the yarn bundle were measured by laser vibration meter. The simulation results are matched with the experimental ones in frequency multiplication while the latter is low. The results show that the vibration equation is suitable for studying the transverse dynamic vibration characteristics of the yarn bundle, and the simulation signal is the fundamental frequency signal of the yarn bundle vibration. At the same time, the transverse dynamic vibration characteristics of the yarn bundle are low frequency vibration.

Key words: yarn bundle, Burger model, axial motion, vibration charactristics