Journal of the Korean Society for Aeronautical & Space Sciences (한국항공우주학회지)

The Korean Society for Aeronautical and Space Sciences (한국항공우주학회)
권호 표지
DOI QR코드

DOI QR Code

Vibration Analysis of Pretwisted Composite Plates with Embedded Viscoelastic Core using Zig-Zag Triangular Finite Element

지그재그 삼각형 유한요소를 이용한 점탄성물질이 심어진 비틀린 복합재료판의 진동해석

  • 이덕규 (한국항공우주연구원 위성운영센터) ;
  • 조맹효 (서울대학교 기계항공공학부)
  • Published : 2003.02.01
Download PDF
⟨ Previous Next ⟩

Abstract

A three node triangular element with drilling rotations incorporating improved higher-order zig-zag theory(HZZT) is developed to analyze the vibration of pretwisted composite plates with embedded damping layer. Shear force matching conditions are enforced along the interfaces between the embedded damping patch and the border patch by matching the shear forces of the embedded damping patch to the shear forces of the adjacent border patch. The natural frequencies and modal loss factors are calculated for cantilevered pretwisted composite blade with damping core with the present triangular element, and compared to experiments and MSC/NASTRAN using a layered combination of plate and solid elements.

고차 지그재그이론을 이용하여 면내회전 자유도를 갖는 3절점 삼각형요소를 개발하여 점탄성물질이 심어진 비틀린 복합재료 판의 진동을 해석하였다. 평면상에서 점탄성물질과 가장자리에서 박리현상을 방지하기 위하여 사용된 경계물질사이의 경계면상에서 전단력 적합조건이 사용되었다. 본 연구에서 개발된 지그재그 삼각형요소를 이용하여 점탄성물질이 심어진 비틀린 외팔보 복합재료 판의 고유진동수와 감쇠계수를 계산하고 실험치 및 판과 고체요소를 혼합한 MSC/NASTRAN결과치와 비교하였다.

Keywords

References

  1. Saravanos, D. A. and Pereira, J. M., "Effects if Interply Damping Layers on the Dynamic Characteristics of Composite Plates." AIAA Journal, Vol. 30, 1992, pp. 2906-2913. https://doi.org/10.2514/3.11636
  2. Di Sciuva, M., "A Third-Order Triangular Multilayered Plate Finite Element with Continuous Interlaminar Stresses." International Journal for Numerical Methods in Engineering, Vol. 38, 1995, pp. 1-26. https://doi.org/10.1002/nme.1620380102
  3. Cho, M. and Parmerter, R. R., "Finite Element for Composite Plate Bending Based on Efficient Higher Order Theory." AIAA Journal, Vol. 32, 1994, pp. 2241-2248. https://doi.org/10.2514/3.12283
  4. Specht, B., "Modified Shape Functions for the Three-Node Plate Bending Element Passing the Patch Test." International Journal for Numerical Methods in Engineering, Vol. 26, 1988, pp. 705-715. https://doi.org/10.1002/nme.1620260313
  5. Lee, D. C. and Kosmatka, J. B., "Passively Damped Vibration of Composite Plates with Zig-Zag Elements." The 41st AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, April 3-6, Paper No. AIAA-2000-1473.
  6. Allman, D. J., "Evaluation of the Constant Strain Triangle with Drilling Rotations." International Journal for Numerical Methods in Engineering, Vol. 26, 1988, pp. 2645-2655. https://doi.org/10.1002/nme.1620261205
  7. Cook, R. D., Malkus, D. S. and Plesha, M. E., Concepts and Applications of Finite Element Analysis, 3rd Edition, John Wiley & Sons.