摘要
为探讨双向张弦梁结构的自振模态特性,采用Block Lanczos法结合有限元算例,对双向张弦梁结构进行了计算分析。研究了双向张弦梁结构的自振频率分布特性以及下弦拉索初始预应力、矢跨比、垂跨比和等效节点质量等参数对自振特性的影响。研究结果表明,双向张弦梁结构自振频率分布较为稀疏,影响其自振特性的主要参数是结构等效节点质量参数。
In order to investigate the natural vibration modal characteristics of bi-beam string structures,the Block Lanczos method and finite element examples are used to analyze bi-beam string structures.This paper studies the natural frequency distribution characteristics of the structure and effects of initial prestress of the lower chord cable,rise-span ratio,sag-span ratio and equivalent node mass on the natural vibration characteristics.The results show that vibration modes of a bi-beam string structure are sparsely,structure mass is the most important factor influencing the natural vibration properties of a bi-beam string structure.
作者
徐蒙越
张莉
XU Mengyue;ZHANG Li(Civil Engineering Department of Shanghai University,Shanghai 200444,China)
出处
《结构工程师》
2021年第1期9-14,共6页
Structural Engineers
基金
上海大学创新基金资助项目(10011811001)。
