摘要
通过对准定常气动力模型[1]进行双变量泰勒展开,导出与自激力等价的12阶单元气动阻尼矩阵和气动刚度矩阵,自激力以单元气动阻尼矩阵和单元气动刚度矩阵的形式在ANSYS中以Matrix27矩阵输入,提出一套在ANSYS中实现大跨度桥梁抖振分析的简便方法。通过对一座大跨度斜拉桥进行抖振时域分析,计算结果表明本文方法的计算结果与该模型的精确结果几乎完全一致,充分说明了本文方法的正确性和实用性。
By applying two-variable Taylor expansion to the quasi-steady aerodynamic force model^([1]), the 12-order element aerodynamic damping matrix and aerodynamic stiffness matrix (equivalent) to the self-excited force order are derived. The self-excited forces are input in ANSYS in form of the element aerodynamic damping matrix and aerodynamic stiffness matrix through Matrix 27. A simplified method is then established for long-span bridge buffeting analysis that can be easily implemented in a finite element program like ANSYS. Through time-domain analysis of buffeting on a long-span cable-stayed bridge, the calculation results obtained from the proposed method in this paper are almost coincident with the precise results from the original model, which amply prove that the method is correct and practical.
出处
《桥梁建设》
EI
CSCD
北大核心
2004年第1期9-12,共4页
Bridge Construction
基金
广东省自然科学基金资助项目(980634)
关键词
长跨桥
抖振分析
时域法
有限元法
long-span bridge
buffeting analysis
time-domain method
finite element method
