3D printing manufacturing method of vibration isolation shoe midsole based on absolute zero-stiffness structure

Abstract

A 3D printing manufacturing method for a vibration isolation shoe insole based on an absolute zero-stiffness structure comprises the steps that firstly, the bearing level of the shoe insole is determined, the shoe insole is of a hollowed-out lattice structure, and the arrangement mode of lattice units is planned; an initial configuration is set for the lattice unit, so that the upper rigid arm, the lower rigid arm and the main rigid arm are combined into an up-and-down symmetrical hexagonal structure; secondly, evaluating the equivalent stiffness of the lattice unit by adopting finite element simulation, and automatically searching the geometric dimension of a lattice unit characteristic element by adopting a machine learning algorithm and taking the equivalent stiffness of the lattice unit which is absolutely equal to zero as a target function, so as to determine a lattice unit configuration which meets the condition; determining an optimal zero-stiffness lattice unit in combination with a design simplicity principle; arraying the optimal zero-stiffness lattice units according to the lattice structure of the shoe insole to obtain a lattice array, and performing arrangement according to a shoe insole model; and finally, the shoe insole sample piece is subjected to 3D printing. According to the invention, the integrated and light-weight rapid forming of a complex shoe insole structure is realized.

Description

technical field [0001] The invention belongs to the technical field of midsoles of vibration-isolation shoes, and in particular relates to a 3D printing method for mid-soles of vibration-isolation shoes based on an absolute zero stiffness structure. Background technique [0002] The organs of the human body are sensitive to low-frequency mechanical vibrations, so the problem of low-frequency failure of the vibration isolation system is completely solved, and the midsole design with full-frequency vibration isolation effects is realized, whether it is in basic science, rehabilitation medicine, or human daily life, etc. fields are of great research significance. In recent years, artificially constructed superstructures with unconventional physical properties have attracted the attention of researchers. Through rational design of internal microstructures, novel properties that are extremely rare in nature can be realized. Cross-fusion machine learning algorithms, modular desig...

AI Technical Summary

Problems solved by technology

The vibration isolation performance of these shoe midsoles often has two disadvantages: first, in order to make the shoe midsole have the vibration isolation effect in the maximum range (minimize the initial frequency of vibration isolation), it is necessary to reduce the equivalent stiffness of the system as much as possible, Or improve its equivalent quality, and the reduction of equivalent stiffness will often lead to a decrease in the bearing capacity of the sole. The contradiction between the two makes the existing shoe midsole structure less effective in the low frequency band, or weak in bearing capacity; secondly, Existing vibration isolation structures are often designed based on experience, lacking effective theoretical guidance, it is difficult to determine a structure with the best vibration isolation effect among the vast number of design schemes

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