欢迎访问林业科学,今天是

林业科学 ›› 2018, Vol. 54 ›› Issue (6): 119-124.doi: 10.11707/j.1001-7488.20180614

• 论文与研究报告 • 上一篇    下一篇

3D打印仿生木材吸声结构的吸声性能

董明锐, 孙伟圣, 薛倩雯, 曹惠敏, 王文斌, 林贤铣   

  1. 浙江农林大学工程学院 杭州 311300
  • 收稿日期:2018-01-22 修回日期:2018-03-04 出版日期:2018-06-25 发布日期:2018-07-02
  • 基金资助:
    国家重点研发计划“珍贵树种地板增值加工技术集成与示范研究”(2017YFD0601105)。

Sound Absorption Properties of 3D Printed Bionic Wood Sound Absorption Structure

Dong Mingrui, Sun Weisheng, Xue Qianwen, Cao Huimin, Wang Wenbin, Lin Xianxian   

  1. College of Engineering, Zhejiang Agriculture and Forestry University Hangzhou 311300
  • Received:2018-01-22 Revised:2018-03-04 Online:2018-06-25 Published:2018-07-02

摘要: [目的]基于木材内部导管和纹孔等天然多孔构造,设计仿生木材复孔吸声结构,分析影响其吸声性能的结构因素,为开发仿生木材吸声材料奠定理论基础。[方法]应用Rhinoceros三维软件建模,利用3D打印技术制备仿生木材吸声结构,采用阻抗管传递函数法研究穿孔率、主孔直径和侧孔深度对仿生木材吸声机构共振频率和吸声系数的影响。[结果]1)在中低频,随着穿孔率增大,3D打印仿生木材吸声结构的共振频率向高频方向移动,吸声系数峰值降低;在高频,随着穿孔率增大,共振频率向低频方向移动,吸声系数峰值升高;2)在中低频,随着主孔直径增大,3D打印仿生木材吸声结构的共振频率基本不变,吸声系数峰值降低;在高频,随着主孔直径增大,共振频率略向高频方向移动,吸声系数基本不变;3)随着侧孔深度增加,3D打印仿生木材吸声结构的共振频率先增大后减小,吸声系数变化不明显;4)3D打印仿生木材吸声结构具有2个显著的共振频率,分别为300和3 500 Hz。[结论]穿孔率、主孔直径和侧孔深度对3D打印仿生木材吸声结构的吸声性能均有较大影响。3D打印仿生木材吸声结构在低频300 Hz和高频3 500 Hz具有良好的吸声性能,吸声频带宽度增加,与传统木质吸声材料既有相似之处也有明显差异。

关键词: 木材, 仿生, 吸声, 3D打印, 穿孔板

Abstract: [Objective] In order to provide theoretical basis for the development of bionic wood sound absorption materials, the sound absorption structure of the bionic wood is designed according to the wood structure. Then, tests on various structural factors of the absorption structure are carried out in this study.[Method] The model of bionic wood sound absorption structure is built by Rhinoceros 3D software. The resonant sound absorption structure is prepared by 3D printed technology.[Result] 1) At low frequency,with the increase of perforation rate,the resonant frequency of 3D printed bionic wood sound absorption structure moves to high frequency,the peak value of sound absorption coefficient decrease; at high frequency,the resonant frequency moves to low frequency,the peak value of sound absorption coefficient increases. 2) At low frequency, with the increase of the diameter of the main pore,the resonant frequency of 3D printed bionic wood sound absorption structure is basically unchanged,the peak value of sound absorption coefficient decrease; at high frequency,the resonant frequency moves to high frequency,the sound absorption coefficient basically unchanged. 3) With the depth of accessory pore increase, the resonant frequency of 3D printed bionic wood sound absorption structure increases firstly and then decreases,but the sound absorption coefficient basically unchanged.4) There are two significant resonant frequencies in 3D printed bionic wood sound absorption structure,300 Hz and 3 500 Hz,respectively.[Conclusion] Perforation rate,diameter of the main pore and depth of the accessory pore present great influence on the sound absorption properties of 3D printed bionic wood sound absorption structure. 3D printed bionic wood sound absorption structure exhibit good sound absorption performance in low frequency 300 Hz and high frequency 3 500 Hz, which has similarities and differences with traditional wood absorbing materials.

Key words: wood, bionic, sound absorption, 3D printing, perforated plates

中图分类号: