Journal of Textile Research ›› 2021, Vol. 42 ›› Issue (10): 75-83.doi: 10.13475/j.fzxb.20210107009

• Textile Engineering • Previous Articles     Next Articles

Sound insulation properties of honeycomb sandwich structure composite for high-speed train floors

HU Qiaole1, BIAN Guofeng2, QIU Yiping2,3, WEI Yi2,4, XU Zhenzhen1()   

  1. 1. School of Textile and Garment, Anhui Polytechnic University, Wuhu, Anhui 241000
    2. College of Textiles,Donghua University, Shanghai 201620, China
    3. College of Textiles and Apparel, Quanzhou Normal University, Quanzhou, Fujian 362000, China
    4. Center for Civil Aviation Composites, Donghua University, Shanghai 201620, China
  • Received:2021-01-27 Revised:2021-06-27 Online:2021-10-15 Published:2021-10-29
  • Contact: XU Zhenzhen E-mail:xuzhenzhen@ahpu.edu.cn

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Abstract:

In order to meet the lightweight and sound insulation requirements of bullet trains and automobiles, honeycomb sandwich composite structure made from various fibers were created. The influence of honeycomb core specifications (density and side length), panel materials (carbon fiber, glass fiber, polyphenylene sulfide (PPS)) and glass microbeads modification on sound insulation performance was analyzed by hot pressing method and four-sensor impedance tube method. The results show that the sound insulation performance is improved with the increase of the density of the honeycomb core, but the side length of the honeycomb core has little effect on the sound insulation. In the region of 100-2500 Hz, the honeycomb sandwich panel with PPS as inner layer, carbon fiber as outer layer and glass beads content of 5% shows the best sound insulation, with an average improvement of 5-8 dB. Compared with the standard aluminum honeycomb sandwich panel used for the current 350 km/h motor vehicle, the aramid honeycomb panel not only exhibits similar sound insulation performance, but also can achieve about 30% weight reduction. It was concluded that the aramid honeycomb sandwich panel has the application potential for replacing the standard aluminum honeycomb as a new generation of sound insulation floor for bullet trains.

Key words: aramid honeycomb sandwich, prepreg, glass bead, sound insulation property, rail vehicle floor

CLC Number: 

  • TB332

Tab.1

Parameters of face sheet materials"

材料 织物组织 面密度/(g·m-2) 树脂含量/% 厚度/mm 剪切强度/MPa 弯曲强度/MPa 弯曲模量/GPa
C 斜纹 200 50 0.33 — 850 45
G 缎纹 300 40 0.35 49 507 130
P 非织造布 255 65 0.78 — 130 4

Tab.2

Parameters of aramid honeycomb core material"

编号 蜂窝类别
(ACT1-A-B)		 厚度/
mm		 密度/
(kg·m-3)		 压缩强度/
MPa		 剪切强度/MPa 剪切模量/MPa
纵向 横向 纵向 横向
1# ACT1-4.8-48 20±0.15 48±0.15 3.1 1.1 0.6 42.4 26.8
2# ACT1-3.2-48 20±0.15 48±0.15 2.3 1.2 0.6 51.0 23.6
3# ACT1-3.2-72 20±0.15 72±0.15 5.6 2.8 1.7 79.3 44.0

Fig.1

Schematic diagram of honeycomb panels preparation. (a) Lay-up process of face sheet and honeycomb core material;(b) Honeycomb panels preparation;(c) Sound insulation test sample"

Tab.3

Parameters of aramid honeycomb sandwich composite with different honeycomb core length and density"

蜂窝夹芯
板名称		 蜂窝
类别		 面板厚
度/mm		 蜂窝芯厚
度/mm		 蜂窝夹芯
板质量/g
C/C-1 0.71 20.83 12.7
G/G-1 ACT1-4.8-48 0.69 21.10 15.2
P-1 0.85 21.13 13.2
C/C-2 0.73 20.84 12.3
G/G-2 ACT1-3.2-48 0.73 21.06 14.3
P-2 0.82 20.96 12.4
C/C-3 0.72 21.10 18.6
G/G-3 ACT1-3.2-72 0.71 21.05 15.1
P-3 0.81 21.36 16.1

Tab.4

Parameters of 3# honeycomb panels with different face sheet materials"

蜂窝夹芯板
结构(m/n)		 面板厚
度/mm		 蜂窝芯
厚度/mm		 蜂窝夹芯
板质量/g
C/C-3 0.71 21.05 15.1
G/G-3 0.72 21.10 18.6
P-3 0.81 21.36 16.1
C/P 1.12 21.67 16.8
P/C 1.14 21.64 16.9
G/P 1.12 21.85 20.4
P/G 1.15 21.96 20.8

Fig.2

Theory of sound insulation of honeycomb sandwich panel and test device. (a) Sound insulation theory of honeycomb panels; (b) Schematic diagram of sound insulation test for honeycomb panels"

Fig.3

Effect of honeycomb core length on sound insulation property. (a) Carbon fiber;(b) Gass fiber;(c) PPS"

Fig.4

Effect of honeycomb density on sound insulation property. (a) Carbon fiber; (b) Glass fiber; (c) PPS"

Tab.5

Effect of different parameters on sound insulation property of honeycomb panel"

类别 平均隔声量/dB 蜂窝芯边长影响/dB 蜂窝芯密度影响/dB 面板材料影响/dB
C/C-1 42.0 ??C/C-1 - C/C-2??=0.3 ??C/C-3 - C/C-1??=0.5 ??C/C-1 - G/G-1??=0
C/C-2 41.7 ??C/C-2 - G/G-2??=0.2
C/C-3 42.5 ??C/C-3 - G/G-3??=0.8
G/G-1 42.0 ??G/G-1 - G/G-2??=0.5 ??G/G-3 - G/G-1??=1.3 ?? G/G-1 - P-1??=0.1
G/G-2 41.5 ?? G/G-2 - P-2??=0.7
G/G-3 43.3 ?? G/G-3 - P-3??=0.4
P-1 42.1 ??P-1 - P-2??=0.1 ??P-3 - P-1??=1.6 ?? P-1 - C/C-1??=0.1
P-2 42.2 ?? P-2 - C/C-2??=0.5
P-3 43.7 ?? P-3 - C/C-3??=1.2
均值 — 0.3 1.13 0.44

Fig.5

Effect of face sheet materials on sound insulation property. (a)Face sheet with one type of material, face sheet with mixed materials;(b) PPS at outer layer; (c) PPS at inner layer"

Fig.6

Effect of modified mix face sheet materials on sound insulation performance. (a) Comparison between unmodified panel and standard sample; (b) Different content of glass microbeads; (c) Comparison of optimal honeycomb panel (C/P-5%) with standard sample"

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