복합적층 원뿔형 쉘의 자유진동에 관한 기하학적 형상의 영향

Effects of Geometrical Shape on the Free Vibration of Laminated Composite Conical Shells

  • 손병직 (서울시립대학교 토목공학과) ;
  • 지효선 (대원과학대학 토목공학과) ;
  • 장석윤 (서울시립대학교 토목공학과)
  • 투고 : 2002.04.19
  • 발행 : 2002.08.27

초록

쉘 구조물은 지붕 구조물, 굴뚝 구조물, 압력구조물, 선박구조물, 항공구조물 등에 널리 사용되는 구조물이다. 본 논문은 전단변형 효과를 고려한 비등방성 복합성층 원뿔형 쉘의 자유진동에 관하여 연구하였다. 복합재료는 2개 또는 이상의 재료들로 구성되어 구조적인 효율성을 증진시키도록 구성된 재료이다. 이러한 복합재료로 구성된 구조물의 거동은 매우 복잡하기 때문에 해석해를 구하기가 거의 불가능하다. 따라서 본 연구에서는 이러한 복합재료로 구성된 원뿔형 쉘의 자유진동을 해결하는데 유한차분법을 사용하였다. 중심각, 정점각 및 다른 기하학적 파라미터의 진동에 대한 효과를 연구하였고, 진동모드 형상을 예시함으로서 진동모드에 관한 물리적 및 공학적인 이해를 증진시키고자 하였다.

Shell structures have become critical in the design of pressure vessels, submarine hulls, ship hulls, airplane structures, concrete roofs, containers for liquids, and many other structures. This study presented the feature of the free vibration of anisotropic laminated conical shells according to transverse shear deformation effects. Composite materials are composed of two or more different materials in order to produce desirable properties for structural strength. Since their behavior is very complex, it is almost impossible to solve the analytical solutions. This effects of subtended and vertex angles and other geometric parameters on vibration were investigated in a comprehensive parametric study. Selected vibration mode shapes were illustrated, to enable the physical understanding of vibration of laminated composite conical shells.

키워드

참고문헌

  1. 한국강구조학회 논문집 v.12 no.4 자유경계를 갖는 비등방성 원뿔형 쉘의 해석 손병직;백한솔;장석윤
  2. Sixth Pacific Structural Steel Conference Continued Volume Buckling Analysis of Anisotropic Laminated Circular Conical Shells Son Byung Jik;Paik Han Sol;Chang Suk Yoon
  3. NASA Technical Report An Improved First-approximation Theory for Thin Shells Sanders
  4. Journal of Applied Mechanics v.12 The Effect of Transverse Shear Deformation on The Bending of Elastec Plates Reissner, E.
  5. Mechanics of Laminated Composite Plates J. N. Reddy
  6. International Journal of Mechanical Sciences v.43 Differential quadrature solution for the free vibration analysis of laminated conical shells with variable stiffness Chih-Ping Wu;Chia-Ying Lee
  7. Journal of sound and Vibration v.224 no.2 Free Vibration Analysis of Truncated Conical Shells by the Differential Quadrature Method Yongljang Wang;Renhuai Liu;Xinwei Wang
  8. Journal of sound and Vibration v.219 no.5 Effects of Subtended and Vertex Angles on the Free Vibration of Open Conical shell Panels : A Conical Coordinate Approach C. W. Lim;S. Kitipornchai
  9. Journal of Applied Mechanics v.66 Free Vibration of Axially Loaded Laminated Conical shells L. Tong
  10. Journal of Vibration and Acoustics v.118 Effect of Axial Load on Free Vibration of Orthotropic Truncated Conical shells L. Tong
  11. Journal of Sound and Vibration v.74 no.3 Free Vibration Analysis of Circular Cylindrical Shells H. Chung
  12. Computers & Structures v.28 no.6 Free Vibrations of Multilayered Thick Composite Shells R. Ramesh Kumer;Y. V. K. Sadasiva Rao
  13. Applied Mechanics v.43 no.4 Assessment of Computational Models for Multi layered Composite Shells Noor. A. K.;Burton. W. S.
  14. Journal of Sound & Vibration v.226 no.4 Vibration of Thick Cylindrical Shells on the Basis of Three-Dimensional Theory of Elasticity C. T. Loy;K. Y. Lam
  15. 대한토목학회 논문집 v.21 no.5-A 기하학적 형상 변화에 따른 복합적층 원통형 쉘의 자유진동 및 모드특성 유용민;박근우;이상열;장석윤