Buckling and Nonlinear Vibrations Analysis of Conoidal Shells
Renata Machado Soares1; Paulo Batista Gonçalves2
1 Federal University of Goiás; 2 Pontifical Catholic University of Rio de Janeiro
doi:10.20906/CPS/COB-2015-0993
Resumo
Slender shell structures described by ruled surfaces have been frequently used in civil engineering and among these slender shells, conoidal shells are frequently favored as roofing units to cover large column-free areas due to the ease of fabrication, aesthetic value and structural efficiency. This work studies the nonlinear buckling behavior and the linear and nonlinear free vibration response of a conoidal shell, using commercial finite element software ABAQUS. The problem is geometrically nonlinear due to the shell strong geometric nonlinearity, especially in the case of shallow shell used in practical applications. The results show the influence of the geometry on the nonlinear response, buckling loads, linear natural frequencies, vibration modes and nonlinear frequency-amplitude relation.
Palavras-chave: Conoidal shells; nonlinear vibration analysis; ruled surfaces; buckling behavior