|کد مقاله||کد نشریه||سال انتشار||مقاله انگلیسی||ترجمه فارسی||نسخه تمام متن|
|5021074||1369688||2018||10 صفحه PDF||ندارد||دانلود رایگان|
â¢Parametric vibration of non-homogeneous (NH) laminated conical shells is analyzed.â¢Basic relations and equations are derived using the Donnell-Mushtari shell theory.â¢Mathieu-type differential equation is obtained by using Galerkin method.â¢The excitation frequencies are determined using Bolotin's method.
The excitation frequencies of parametric vibration of laminated non-homogeneous orthotropic conical shells (LNHOCSs) under axial load periodically varying with time, are determined using the classical shell theory (CST). The basic equations are found using the Donnell-Mushtari shell theory and reduce to the Mathieu-Hill type differential equation, in which the instability is examined by the Bolotin method. To validate of current results was made a comparison with the previous studies. The effects of stacking sequences, axial load factors, non-homogeneity, as well as the variation of geometric characteristics on the backward and forward excitation frequencies (BFEFs) of conical shells are studied in detail.
Journal: Composites Part B: Engineering - Volume 132, 1 January 2018, Pages 151-160