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Acta Mechanica Solida Sinica

, Volume 23, Issue 4, pp 370–376 | Cite as

Green Quasifunction Method for Free Vibration of Simply-Supported Trapezoidal Shallow Spherical Shell on Winkler Foundation

  • Shanqing Li
  • Hong Yuan
Article

Abstract

The idea of Green quasifunction method is clarified in detail by considering a free vibration problem of simply-supported trapezoidal shallow spherical shell on Winkler foundation. A Green quasifunction is established by using the fundamental solution and boundary equation of the problem. This function satisfies the homogeneous boundary condition of the problem. The mode shape differential equation of the free vibration problem of simply-supported trapezoidal shallow spherical shell on Winkler foundation is reduced to two simultaneous Fredholm integral equations of the second kind by Green formula. There are multiple choices for the normalized boundary equation. Based on a chosen normalized boundary equation, the irregularity of the kernel of integral equations is avoided. Finally, natural frequency is obtained by the condition that there exists a nontrivial solution in the numerically discrete algebraic equations derived from the integral equations. Numerical results show high accuracy of the Green quasifunction method.

Key words

Green function integral equation shallow spherical shell free vibration Winkler foundation 

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Copyright information

© The Chinese Society of Theoretical and Applied Mechanics and Technology 2010

Authors and Affiliations

  1. 1.MOE Key Laboratory of Disaster Forecast and Control in Engineering, Institute of Applied MechanicsJinan UniversityGuangzhouChina

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