摘要
应用ANSYS大型有限元程序对本溪市体育馆钢屋盖进行有限元分析,得出该体育馆在静力荷载下的位移和内力,并进行了模态分析,采用子空间迭代法得出了体育馆的前20阶结构固有频率和前6阶振型.分析了该结构的动力特性,避免其在使用中因共振或疲劳破坏等因素造成不必要的损失,为进一步研究此类结构的受力特性提供了参考.通过对本溪市体育馆空间桁架的计算结果分析发现,空间大跨结构采用空间桁架也完全可以取得满意的效果,空间桁架的合理布置,可以使得各种杆件受力合理,充分发挥材料的性能.
Finite element analysis of Steel roof of Benxi Gymnasium was made using ANSYS program. The displacements and internal forces of the struture under static load were obtained. A modal analysis using subspace iteration method was performed to get the preceding 20 natural frequencies and the preceding 6 vibration patterns. The dynamic properties of the steel roof were obtained to avoide the unnecessary losses due to resonance or fatigue damage. The computation provides a reference for study of the mechanical properties of similar projects. From the calculation results of BenXi Gymnasium, it can be seen that the behavior of si^ace truss is good. The internal force of members and performance of materials can be opti- mized by reasonable arrangement.
出处
《空间结构》
CSCD
北大核心
2009年第2期82-85,共4页
Spatial Structures
基金
中国教育部春晖计划资助项目(2007)
关键词
空间结构
钢管桁架
有限元
模态分析
spatial structure
steel pipe truss
finite element
modal analysis
