MODAL ANALYSIS OF A THERMAL POWER PLANT COOLING TOWER M-MODIFIED

Abstract

Regular Draft Hyperbolic Cooling towers are the describing land signs of power station. They contribute both to a productive vitality yield and to a cautious equalization with our surroundings. These structures are most productive measures for cooling of warm power plants by minimizing the need of water and staying away from warm contamination of water bodies. The present project manages the investigation of static and element examination of hyperbolic cooling towers (i.e. self-weight, seismic burden, wind load). Two existing cooling towers are looked over Bellary warm Power station (BTPS) as contextual analysis. The limit conditions considered are Top end free and Bottom end is settled. The Material properties of the cooling towers are youthful modulus 31GPa, Poisson Ratio 0.15 and thickness of RCC 25 kN/m3. Static investigation has been done utilizing 8 node SHELL 93 component and 4 nodes SHELL 63.The behavioral changes because of anxiety convergence of cooling tower is broke down utilizing ANSYS 10 (SHELL 93) component with shifting its tallness and thickness. The goal is to get the ideal stature, with low stretch focus. Seismic and wind examination has been completed for two existing cooling tower utilizing (FEA), SHELL 93 component. The Seismic burdens are completed for 0.5g, 0.6g, 0.7g, ground increasing speed as per IS 1893(part I)- 2002 and IS 1893(part IV)-2005 by modular and Response Spectrum strategy. Wind loads on these cooling towers have been figured as weight by utilizing outline wind weight co productive given in IS 11504-1985 code and outline wind weight at distinctive levels according to IS 875 (Part 3)- 1987 code. Eigen clasping investigation has been done for both existing cooling towers. Greatest Deflection, Maximum Principal Stress and strain, Maximum Von Mises stress, strains are acquired. The variety in max primary anxiety v/s thickness, greatest avoidance v/s thickness is plotted graphically.

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