摘要
针对大跨度桁架悬索桥全桥气弹模型风洞试验问题,提出了一种新的模型设计方法。首先通过多种建模方法建立有限元模型进行动力特性比较。采用单脊梁骨架模型方法模拟桁架加劲梁刚度,合理简化桁架加劲梁外形近似模拟桁架气动力。分析桥塔、主缆、吊杆等模型设计中的各种影响因素。最后对模型进行动力特性试验验证,试验结果与理论分析接近一致。
The complicated configuration of suspension bridge with the truss stiffened girder is difficult to imitate in the wind tunnel tests of full - scale aeroelastic model of bridge. A new model design method is put forward. The dynamic characteristics of the finite element method models built by various modeling method are compared. Next the design method which replaces the truss stiffened girder with a single beam through equivalent rigidity and simplifies the appearance of the truss stiffened girder properly is used. Then various influencing factor in the design of model such as a bridge tower, main cable and the hanger rod are analyzed. The dynamic behavior test is carried out, and the testing result and theoretical analysis coincides nearly.
出处
《南昌大学学报（理科版）》
CAS
北大核心
2008年第5期505-510,共6页
Journal of Nanchang University(Natural Science)
关键词
大跨度桥梁
风洞试验
动力特性
全桥气弹模型
模态测试
long span bridge
wind tunnel test
dynamic behavior
full -scale aeroelastic mode of bridge
modal test
作者简介
王运金（1965-），男，高级工程师
