【作者】 张文福； 刘迎春；

【Author】 ZHANG Wenfu, LIU Yingchun(DepanmenI of Civil Engineering, Daqing Pelroleum Institute. Daqing 163318, China)

【机构】 大庆石油学院土木建筑工程学院；

【摘要】 采用大型有限元分析软件ANSYS对劲性索结构进行了固有振动分析,并与采用能量变分法对劲性索结构固有振动分析得到的结果进行了比较,得到劲性索结构的自振特性;采用时程分析法进行竖向地震反应分析,计算输入3种地震波时结构竖向位移最大节点的位移时程曲线、内力最大的杆件内力时程曲线。结果表明,本文给出的计算劲性索结构频率的计算公式具有很高的精度,误差均在5%以内,利用ANSYS软件建立劲性索模型,进行地震反应分折是可行的。更多还原

【Abstract】 Natural vibration of stiff cable structures is analyzed base upon the large general structural analysis software ANSYS and the energy variational method, the results of two methods are compared, from which the characteristics of free-vibration are obtained. Moreover, vertical seismic response analysis of stiff cable structures is carried out via time-history method. Under three kinds of natural earthquake waves, the results of time-history curve of vertical maximal displacement as well as time-history curve of maximal initial force are presented. The results show the formulas of frequencies for stiff cable structures given by this paper are of high accuracy, and the differences of frequency are all within 5%. Furthermore, ANSYS can be applied to the seismic response analysis of stiff stable structures.更多还原