FINITE ELEMENT ANALYSIS OF 3D-PORTAL FRAMES STRUCTURAL DYNAMICS APPROACH

Abstract

Now a days the majority of structures are constructed in the model of frame. The framed structures are used for buildings nuclear power plants, seashore structures, turbo generators etc. A framed structure resists the action of applied loads by bending action of members of the frame. The present study aims at the behavior of turbo generator frame under static and dynamic loads. The foundation for framed structures is most suitable for turbo machines. turbo generator, steam turbine and gas turbine. The finite element method of analysis has been shown to be a powerful tool for the solution of various problems in continuum mechanics. Among its many uses are •its application to 3-D portal frame problems for computing deformation and stresses. A commercially available software package ANSYS 5.4 has been used primarily to take advantage of inbuilt preprocessor and post processor. .It is the large scale of general purpose package for numerically solving a wide variety of engineering problems. One of them is solving the problems for static and dynamic structural analysis. For the purpose of study Banharapalli (Orissa) turbo generator has been considered. Static and dynamic analysis is carried out for the given turbo generator frame. The static and dynamic analysis has been carried out for the given turbo generator frame. Calculation of maximum amplitude vibration for a steady state condition often the main item of interest in an engineering dynamics problem. Amplitudes for the given dynamic loads have been carried out and the results shows that these values are within the permissible limits.