Research On The Earthquake Resistance Performance Of Air Cooledcondenser Platform Inflenced By Condenser's Properties

Air cooled condenser platform structure is a kind of new structural system, which is appeared with air cooled techniques. At present, direct air-cooling process has been using in part of the power plant ,but it is mainly designed by foreign companies. In order to promote the domestically process of the new structural system, studies on the property of this new structure have already conducted in our country. Direct air-cooled condenser is the main process equipment; it has a big mass and greater stiffness, which would have impact the structural dynamic property and the earthquake resistance performance. As continuation of the existing researches, this paper is focused on the structural dynamic property and earthquake resistance performance influenced by the air-cooled condenser, the major tasks as following:(1) Modal analysis and the earthquake resistance performance analysis in two situations that the condenser as a part of structure and as the equipment load;(2) Study on earthquake resistance performance of air cooled condenser platform under different condenser's properties;(3) Determination of condenser stiffness distribution coefficient and mass-load distribution coefficient.We established the finite element model using SAP2000, a finite element analysis software. Condenser's characteristic parameter mainly has two.One is stiffness distribution coefficientα_k which reflects the stiffness characteristic parameter.The other is mess-load distribution coefficient a_m which reflects the mass coefficient parameter.This article anglysis the air cooled platform basic self oscillation cycle change curve under different a_k and a_m. In contrast to the formerly research results ,we can determined that in which kind of situation the structure is closer to the real structural dynamic property, then determines the condenser characteristic parameter finally.