10×104m3浮顶储油罐的模态分析

摘要

With development of large-scale storage tanks, seismic research on large storage tanks has become more and more important. In this paper, in order to provide relative data for earthquake response analysis , ANSYS finite element software was used to simulate 10×104 m3 floating roof storage tank and modal analysis was carried out. Then vibration characteristics were gained and the first 30 order natural modal was extracted. Images analysis of large storage tank shows that the main vibration model is multiple circumferential wave.Tank's top position is easy to be damaged and strengthen circle should be set there.%随着储罐大型化发展的趋势,大型储罐的抗震研究工作变得越来越重要.为了给大型储罐的地震力响应分析提供可靠的数据,应用ANSYS大型有限元软件,对10× 104m3浮顶储油罐简化建模,从而进行模态分析.得出了其自振特性,并提取了其前30阶固有模态.从图象分析出大型储罐罐的主要振型为环向多波振型,且罐体上沿在振动时最易发生破坏,应在罐体顶部位置设置加强圈.