摘要
本文用杆系结构动力有限元法分析了我国定型设计中具有斜桥门架的三座铁路简支桁架桥的空间自振特性,并在分析计算结果的基础上就自振频率的近似计算及用有限元法分析时计算模型的选取等问题作了讨论。
The paper analyses the free vibration characteristics of three typical simply supported railway truss bridges as space-frame structures by finite element method. In this paper the approximate formulas for computing the natural frequencies of these bridges are presented and the corresponding mode shapes are discussed.
出处
《西南交通大学学报》
EI
CSCD
北大核心
1989年第4期17-22,共6页
Journal of Southwest Jiaotong University
关键词
木行架桥
有限元法
自振频率
振型
truss bridges
finite element method
natural frequencies
mode shapes
