Tunable gradient curled sound barrier structure and method based on 3D printing

By using 3D printing technology and modified microporous nylon materials, a tunable gradient curling sound barrier structure was designed, which solved the problems of bulkiness and coincidence effect of traditional sound barriers. It achieves lightweight, wide-bandwidth, and efficient isolation of bi-peak noise, and is suitable for noise control in traffic scenarios such as highways and urban overpasses.

CN122280092APending Publication Date: 2026-06-26CHINA THREE GORGES UNIV
0 Cites 0 Cited by

Patent Information

Application Number
CN202610334416.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-03-18
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

Existing sound barrier technologies cannot achieve efficient isolation of both low-frequency and high-frequency dual-peak noise while maintaining extreme lightweight design, and they also struggle to address the issues of large-scale manufacturing and fit-up of complex internal cavity structures.

Method used

A 3D-printed tunable gradient roll-up sound barrier structure is adopted, combined with modified microporous nylon composite material and selective laser sintering process. A solid skeleton and internal gradient air channels are designed. A wide-bandwidth, dual-peak response is achieved through gradient distribution and acoustic-solid coupling effect. The microporous structure is used to enhance damping characteristics and eliminate resonance sound transmission phenomenon.

Benefits of technology

It achieves efficient sound absorption and insulation in the low-frequency range of 315-500Hz and the mid-high-frequency range of 800-1250Hz, reduces structural weight, avoids resonance transmission, and has engineering manufacturing feasibility and wide applicability.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The invention provides a tunable gradient curled sound barrier structure and method based on 3D printing, and relates to the technical field of environmental noise control, a sound barrier unit is prepared by adopting an integrated forming process, and the core of the sound barrier unit is that a folding curled topological skeleton in gradient distribution along the sound wave propagation direction is constructed inside; and the framework extends along the vertical height to form a three-dimensional entity. And the geometric dimension and spacing of the internal folding channel support parameterization adjustment so as to realize accurate matching of target noise spectrum features. In terms of manufacturing process and material, a selective laser sintering technology is adopted, and the modified microporous nylon composite material is used as a raw material for preparation. For a highway traffic noise scene, the structure effectively prolongs a sound wave propagation path and induces sound energy to dissipate by using a gradient change folding channel, so that efficient insertion loss of two energy concentration frequency bands of 315-500Hz and 800-1250Hz is realized; and meanwhile, micropores and high damping characteristics in the material are combined, so that the anastomosis effect is effectively inhibited.
Need to check novelty before this filing date? Find Prior Art