【摘要】 采用三维地震理论和振型分解反应谱法，对目前2种常用的网格形式的双层圆柱面网壳分析了几十个具体算例，找出它的动力特性变化规律和主要影响参数，用回归分析方法建立基频近似计算公式，提出了地震反应主方向判别原则更多还原

【Abstract】 In this paper, more than dozens of double - layer cylindrical latticed shells with two different network structures are analyzed by using three - dimensional space earthquake theory and methed of vibration moderesolution reaction spectrum. The variahon pattern of the bynamic characteristics and the principal influencing factors are determined. The regression analgtical method is used to establish the approximate computation formla for the basic frequencies, and the rule for determining the principal direction of seismic reaction is proposed.更多还原