Modeling and Simulation of a Moving Yarn Segment: Based on the Absolute Nodal Coordinate Formulation

Self Cite

This paper continues the previous study and presents a dynamic modeling approach for a high-speed winding system. To meet the requirements of high-speed winding, a twin-rotor coupling structure is adopted in the winding system. It is a complex spindle system, due to its high speed, heavy load, frequency-dependent coupling parameters, and time-varying rotational speed. In this paper, an approach to establishing a finite element model of the winding system is proposed to predict its dynamic behavior characteristics during the winding process. First, the spindle and contact roller models of the discrete single component are developed based on Timoshenko beam theory. Bending, transverse shear effects, and gyroscopic moment are considered in the models. The contact stiffness between the contact roller and the packages to be wound on the spindle is simplified by a nonlinear spring. The contact stiffness is identified by dynamics analysis in ANSYS® 17.0. Next, a fully dynamic model of the winding system, which consists of the spindle subsystem, the contact roller, and the flexible coupling elements, is established. Third, the Newmark method is used to develop the program to solve the dynamic equations in MATLAB® 2013b. Finally, the effects of the supporting system and contact state on the winding system's dynamic response are investigated. The results indicate the model of the winding system presented in this paper is suitable for predicting dynamic performance during the winding process.

Section: The Structure and Parameters Of The Filament Packagementioning

confidence: 99%

A dynamic modeling approach for a high-speed winding system with twin-rotor coupling

Hou

Wang

Feng

et al. 2020

Self Cite

“…proposed a finite element model for detailed simulation of the dynamics of yarn segments. 24 Liu et al. used finite element modeling to simulate the internal stress of the yarn due to yarn tension and winding speed.…”

mentioning

confidence: 99%

Simulation-based setting suggestions for yarn winding units to reduce color variation in knitted fabric

Schmeißer

Bell

Gramsch

et al. 2023

The finishing of yarns by bobbin dyeing is of key importance in the value chain of home and apparel textiles. In the bobbin dyeing process, yarn bobbins are placed on dye spindles and passed through with dye liquor. If the winding process parameters are selected unfavorably, the density of the winding package is inhomogeneous. The inhomogeneous density distribution leads to an inhomogeneous flow of dye liquid through the package and, hence, to dyeing defects. In order to minimize dyeing defects and to reduce set-up times, we present a simulation-based parameter recommendation for cross-winding machines in this paper. We use a kinematic model of the winding process combined with an empirical model for the package diameter to optimize the package density distribution. We introduce a criterion to avoid patterning defects and adapt winding settings. For bobbins with Nm 34 Co yarn, the homogeneity of the density was improved and the color deviation was reduced by up to 50% due to these simulation-based setting suggestions.

“…Wang et al 13 presented a new flexible multi-body system approach for modeling textile systems, including the filament and the draft rollers, using the ANCF, simulated a polyester filament bundle with oil and water and obtained its dynamic behavior. Wang et al 14 and Li et al 15 established the filament element model by using the ANCF, considering the action of air resistance and the dynamic viscoelasticity of the filament bundle, and studied its motion trajectories through experiment and simulation, respectively.…”

mentioning

confidence: 99%

“…The trajectory of a moving filament in space is the result of the comprehensive effect of the external factors, as well as its inherent properties. At present, most of the research on the dynamic behavior of the moving filament mainly focuses on the trajectories, [14][15][16] velocity and acceleration, as well as the tension control 17,18 and so on, with less attention paid to the research of the winding process presently.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Dynamic behavior analysis of the winding system during filament reversing pushed by the traverse mechanism

Wang

Chen³

et al. 2022

The filament bundle is a kind of fiber assembly with an ultrahigh length–diameter ratio. For textiles, the filament is an intermediate product in the textile production process. For ease of storage, transportation and subsequent processing, the filament is wound to form a disc-shaped package with a certain size. During winding, the high-speed moving filament is placed precisely on the cylindrical surface of the package with the spiral shape by the traverse mechanism. Unfortunately, uneven tension of the filament during reversing is caused by the action of the traverse mechanism, which directly affects the quality of the filament package. In this article, the approach of modeling and simulating the filament winding system was proposed, of which the element model of the filament was established by the absolute node coordinate formulation, considering its viscoelasticity, as well as the effect of gravity. The contact model between the filament and the rotary vane, as well as the contact roller, was established by the Hertz law. The equations of motion for the system were derived by the Lagrange equations, and the algorithm for solving the differential-algebraic equations was further derived. Then, the dynamic behavior of the winding system during reversing was simulated and analyzed, and the results show that the moving filament is in non-contact with the rotary vane at the moment of reversing, and the small fluctuation in contact force between the rotary vane and the filament causes the large fluctuation in the filament tension. Finally, the validity is tested through an experiment.