多层厂房楼盖竖向振动分析

Analysis on the Vertical Vibration of Multi story Factory Building

采用有限元方法对多层厂房楼盖的竖向振动特点进行了分析 .以算例为基础 ,绘出了几种情况下的振幅 -扰频曲线 .通过对竖向振动和水平振动的振幅 -扰频曲线的对比分析 ,阐述了竖向振动的独特规律 ,得出了诸如竖向振动基频共振不一定是最大共振。

In this paper,the finite element method is applied to analyse the vertical vibration of thin plate in multi story factory building.The special property of vertical vibration is studied.Some curves about the relation between the greatest displacement and frequence of interfere force are drawn through instances calculated.The same or different matters between the curves of vertical vibration and those of horizontal vibation are also analysed for explaining the characteristic of vertical vibration.Moreover,a few new conclusions on vertical vibration are presented.The greatest vibration,e.g.,does not appear definitely when the frequence of interfere force approaches the lest frequence of structure,vertical vibration is greater than horizontal vibration in a wide rang of interfere force and so on.