【摘要】 泵站的自振频率在低频部分将主要反应上部结构的动力特性,其后的部分主要反应下部大块体结构的动力特性。由于泵站上下两部分的刚度和质量相差比较悬殊,因此两部分的一阶自振频率相差很大,本文通过对某大型泵站有限元动力分析研究,提出采用上部结构和泵站泵房的动力特性分开计算,在进行反应谱法分析后再将两者的动力响应进行组合考虑的组合方法。即将整体计算分为计入上部结构和不计入上部结构两个部分,分别运用反应谱分析结构的动力响应,最后将两者的动力响应组合起来形成整体的动力响应。数值计算结果证明了该方法的合理性与可行性。更多还原

【Abstract】 Because the quality and stiff between pump room and chamber are greatly disparate,it is difficult to acquire the dynamic frequencies and natural vibrations through the regular methods.According to the dynamic analysis of a large scale pumping station,the coupled method is proposed to solve this problem,the whole structure is divided into block pump room and upper frame,the dynamic responses of these two parts are initially calculated,respectively,and they are finally assembled into final responses of the whole pump station.The numerical results show the rationality and feasibility of this method.更多还原