根据梁式构件在大型模拟地震振动台上的实验资料 ,求得 3种不同比尺的石膏纯悬臂梁及加质量块悬臂梁结构的材料前四阶的振型动态弹性模量 (简称动弹模 )和非振型动弹模 .实验结果表明 :振型动弹模随振动阶次的增加而增加 ;非振型动弹模的变化主要发生在从低频 (低于一阶固有频率 )到一阶固有频率这一范围 ,且随频率增加而增加 .几何比尺 (Cl≤ 10 )对像石膏这样的线弹性材料的动弹模变化规律影响不大 According to the experimental data of beam members on large analog seismic shaking table, the dynamic moduli of the first four modes of the gypsum pure cantilever beam plus the mass cantilever beams with three different scales were obtained. ) And non-mode-type dynamic ammunition.The experimental results show that the mode-mode dynamic ammunition increases with the increase of the vibration order, and the change of the non-mode-type dynamic ammunition mainly occurs from the low frequency (from the first natural frequency) to the first natural frequency This range increases with increasing frequency.Geometry scale (Cl≤10) has little effect on the laws of dynamic elastic deformation of linear elastic materials such as gypsum