Reduction of Radiating Sound from CFRP Laminated Plates with Orthotropy

  • Nobuyuki OkuboEmail author
  • Yuki Izumi
  • Takeshi Toi
  • Hideyuki Muramatsu
  • Yuji Naito
Part of the Conference Proceedings of the Society for Experimental Mechanics Series book series (CPSEMS)


CFRP is being positively introduced because of its light weight with sufficient stiffness for example in vehicle body but from acoustic aspect more investigations are needed. In order to grasp the vibration and acoustic feature of flat and curved CFRP laminated plates with orthotropy, the difference from isotropic material such as steel is clarified using experimental modal analysis. As a result CFRP is found to possess a dominant radiating sound mode shape at specific frequency. Then based on the FE model of the CFRP plate, a small CFRP patch with optimum anisotropy is designed to attach for effective reduction of the sound and finally its performance is verified in experiment.


Radiating sound CFRP laminated plate Fiber direction Orthotropic Anisotropy 


  1. 1.
    Fukuda H et al (1989) Mechanics of composite material. Kokinshoten, Tokyo, 233pGoogle Scholar
  2. 2.
    Scott JFM et al (1992) Vibration of an elastic strip with varying curvature. Philos Trans R Soc Lond Ser A Math Phys Eng Sci 339(1655): 587–625CrossRefzbMATHGoogle Scholar
  3. 3.
    Kaneda S et al (2001) Reduction of radiating sound power by optimal design of curvature of vibrating plate. J BEM 18:13–18Google Scholar
  4. 4.
    Nakajima J et al (2010) Reduction of booming noise due to panel radiation. JSAE (54–10):14–16Google Scholar
  5. 5.
    JIS K 7164: Test for tensile propertyGoogle Scholar

Copyright information

© The Society for Experimental Mechanics, Inc. 2015

Authors and Affiliations

  • Nobuyuki Okubo
    • 1
    Email author
  • Yuki Izumi
    • 1
  • Takeshi Toi
    • 1
  • Hideyuki Muramatsu
    • 2
  • Yuji Naito
    • 3
  1. 1.Chuo UniversityBunkyo-kuJapan
  2. 2.Toyota Technical Development Co.TokyoJapan
  3. 3.Toyota Technocraft Co., Ltd.TokyoJapan

Personalised recommendations