Virtual Particle Method for Calculating Deformation of Plastic Film

Abstract

The invention relates to a virtual particle method for calculating plastic film deformation, which is characterized in that the following steps are adopted: 1) establishing a particle and line unit model, and clarifying the function and connection of the mass point and line unit; 2) establishing a mathematical model for plastic film calculation, and determining the film Material parameters; 3) Combining the path unit and virtual reverse motion to obtain the calculation formula of the internal force of the end point of the line unit, and deriving the calculation formula of the external force of the film according to the line unit model, and obtaining the force state of the particle; 4) Combining Newton's second law , using the explicit central difference formula, write a calculation program to solve the displacement of the particle after being stressed; 5) Determine the deformation of the film according to the displacement of the particle and the initial shape, and then obtain the deformation of the plastic film after being stressed. The invention can obtain the deformation amount of the wind-selected plastic film in the sorting process, improve the precision of theoretical research and sorted plastic film, thereby laying a foundation for optimizing and improving the sorting machine of the plastic film.

Description

technical field [0001] The invention relates to the field of garbage sorting, in particular to a method for calculating deformation in plastic film sorting. Background technique [0002] In recent years, with the continuous advancement of my country's urbanization process, the output of domestic waste in cities has increased year by year. According to statistics, waste plastics account for about 10% of the total amount of waste in large and medium-sized cities. As a non-pollution and high-efficiency sorting method, wind separation has been paid more and more attention by people. In the existing theoretical research on the winnowing process, the waste plastic film is regarded as a rigid particle, and the deformation of the film in the sorting process is not considered, resulting in poor accuracy of the theoretical research, which leads to the difficulty of optimizing the sorting equipment and reduces the quality of the film. Sorting accuracy. [0003] Among the existing tec...

AI Technical Summary

Problems solved by technology

In the existing theoretical research on the winnowing process, the waste plastic film is regarded as a rigid particle, and the deformation of the film in the sorting process is not considered, resulting in poor accuracy of the theoretical research, which leads to the difficulty of optimizing the sorting equipment and reduces the quality of the film. Sorting accuracy

[0003] Among the existing technical methods, the main method that can be used to calculate the deformation of the film in the winnowing process is to use the fluid-solid coupling analysis method, and the fluid-solid coupling analysis method has the disadvantages of poor convergence and a large amount of calculation when solving the problem of film deformation. Therefore, it is necessary to invent a new analysis method for the calculation of film deformation in the wind separation process.

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