正放四角锥网架屋盖的固有振动分析  

Natural Vibration Analysis of Pyramid Space Grid Roof Structures

作　　者：马令勇[1] 白那 刘文洋[1] 

机构地区：[1]大庆石油学院,大庆163318 [2]大庆乙烯石化设计院

出　　处：《东北林业大学学报》2005年第4期59-61,共3页Journal of Northeast Forestry University

摘　　要：为了深入认识正放四角锥网架屋盖的固有振动特性,对拟夹层板法和有限元方法求得的第一阶竖向频率进行了比较,验证了拟夹层板法求解的精度.采用拟夹层板法对跨度30～60 m的正放四角锥网架在4种屋面荷载作用下的固有振动进行分析,并通过ANSYS软件模态分析观察网架振型,基于分析与观察结果给出了正放类网架屋盖的固有振动规律.In order to further understand the natural vibration property of pyramid space g rid roof structures, first-order frequencies obtained by analogy sandwich method (ASM) and finite element method (FEM) were compared. The results showed that AS M was of high accuracy. Then ASM was used to analyze pyramid space grid roo f structures whose span is 30～60m under 4 kinds of roof load, and mode sh apes were also be presented by ANSYS software. Finally, some rules of free vibra tion for pyramid space grid roof structures were given.

关 键 词：网架 固有振动 拟夹层板法 有限元 

分 类 号：TU356[建筑科学—结构工程]