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A fabric simulation method based on yarn model

A simulation method and fabric technology, applied in the field of fabric simulation, can solve the problems of not considering the fabric structure, time-consuming, etc., and achieve the effect of having a sense of reality and improving the simulation speed.

Inactive Publication Date: 2019-03-08
BEIHANG UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

[0005] (1) The principle of the traditional fabric physical simulation method is simple, but to obtain detailed effects such as fabric folds, a fine grid is required, and physical simulation on a fine grid is time-consuming
[0006] (2) The model used in the traditional fabric physical simulation method is an approximate representation of the fabric, without considering the structure of the fabric

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • A fabric simulation method based on yarn model
  • A fabric simulation method based on yarn model
  • A fabric simulation method based on yarn model

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Embodiment Construction

[0054] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0055] Such as figure 1 As shown, the present invention obtains a more realistic fabric simulation effect on the basis of increasing the calculation speed. Its core content can be: in the fabric modeling stage, the fabric is firstly discretized into a node-based model representation, and the generalized mass matrix of the fabric is calculated; in the force analysis stage, the internal and external forces on the fabric are analyzed, and the kinematics Equation, in order to obtain the dynamic simulation effect; in the motion integration stage, the kinematic equation is integrally solved to obtain the corresponding motion state of the fabric at a certain moment; in the deformation constraint stage, the deformation of the fabric is constrained.

[0056] (1) Modeling the fabric to obtain a discrete structural model representation that can...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

The invention relates to a fabric simulation method based on a yarn model, and provides a discretization modeling method of woven fabric, and the expression of the internal force and the external force of the model fabric is given when the force analysis is carried out. In the aspect of model representation, the continuous yarn model is adopted, and its quality is continuously distributed on the yarn, which is more consistent with the real fabric. Aiming at the possible superelasticity problem in fabric simulation, the corresponding solution is given. By combining the deformation constraint with the motion equation, the deformation constraint can be solved in the process of motion integration without modifying the physical simulation model, and good simulation results can be obtained. Themethod comprises the following steps that (1) the discrete modeling is carried out on the fabric based on the structural characteristics of the fabric; (2) based on Lagrange kinetic equation, the internal and external forces acting on the fabric are analyzed; (3) Semi-implicit integration scheme is used to integrate fabric motion, and the purpose of dynamic simulation is realized; (4) the deformation of the fabric is restrained.

Description

technical field [0001] The invention relates to a fabric simulation method based on a yarn model, belonging to the technical field of fabric simulation. Background technique [0002] Fabrics are things that can be seen everywhere in daily life, such as towels, curtains, tablecloths, flags, clothing, etc. In the field of computer animation, fabric simulation is also one of many key technologies to enhance the reality of animation and improve people's visual experience. Although fabric simulation is a technology with broad application prospects, due to the difficulty of fabric deformation simulation, the current simulation methods cannot simulate fabric movement very accurately, but an approximate representation of fabric movement. The physical simulation method considers the physical characteristics of the fabric, and has unique advantages in describing the material and deformation of the fabric. [0003] In previous research work, commonly used simulation models include sp...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F2119/06G06F30/20
Inventor 王莉莉许阳刘鑫达梁兴仑
Owner BEIHANG UNIV
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