Showing 3 results for M.M. Saadatpour
M.e. Eslimi, M.m. Saadatpour, M. Vafaeian,
Volume 13, Issue 1 (7-1993)
Abstract
M. R. Behbahanifard, M.m. Saadatpour,
Volume 15, Issue 1 (7-1994)
Abstract
A frequency domain dynamic analysis is needed to obtain the response of structures constructed on a system of base isolators on flexible soil when subjected to earthquake ground motion. In such systems, the lateral stiffness of the base isolators is so small, compared to the structural stiffness, that in an earthquake attack the fundamental vibration mode dominates the response. With this in mind, a simple equivalent model is introduced for the assembled structure and its flexible isolators. Next, this simple model is modified to include the effect of soil flexibility. This final model is believed to be appropriate for the frequency domain analysis of the whole system. Frequency independent dynamic characteristics of the model are determined and several response spectra pairs are prepared for both the exact and developed models. The results are in good agreement while the computational efforts for the simplified model is less.
S. Hatami, M. Azhari, and M.m. Saadatpour,
Volume 26, Issue 1 (7-2007)
Abstract
Based on classical plate theory, standard and spectral finite element methods are extended for vibration and dynamic stability of axially moving thin plates subjected to in-plane forces. The formulation of the standard method earned through Hamilton’s principle is independent of element type. But for solving numerical examples, an isoparametric quadrilateral element is developed using Lagrange interpolation functions. The spectral method is, in fact, the solution of motion equation for an axially moving plate. Although this method has some limitations concerning boundary condition of plate and in-plane forces, it leads to an exact solution of free vibration and stability of plates travelling on parallel rollers. The method can be used as a benchmark of accuracy of other numerical methods.
