摘要
为了简化桥梁结构颤振时域分析、提高计算效率,以结构自激力脉冲响应函数表达式为基础,基于ANSYS软件的重启动技术,提出了桥梁结构颤振时域计算的重启动迭代方法.分别对具有理想平板截面的简支梁和半漂浮体系斜拉桥灌河大桥进行颤振时域分析来验证该方法的有效性.结果表明:重启动迭代计算方法所获得的结构颤振临界响应与理论解吻合良好,且计算结果对于时间步长的选取没有依赖性,该方法能够真实反应所有参与模态的振动响应,可应用于实桥的颤振时域分析中.
In order to simplify the time-domain flutter analysis of bridge structures and improve the computational efficiency,a restart iteration method is proposed based on the impulse function expression of self-excited force by using the restart technology of ANSYS. The effectiveness of the proposed method is proved by time-domain analysis of a simply supported beam with ideal flat section and a semi-floating cable-stayed bridge—Guanhe Bridge. The results showthat the critical flutter response of bridge structures obtained by the proposed method agrees well with the theoretical solution.And the calculation results are independent of the time step. The restart iteration method can consider all vibration modes of structures,thus it can be applied to the flutter analysis of the bridge structure in the time domain.
出处
《东南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2016年第1期133-139,共7页
Journal of Southeast University：Natural Science Edition
基金
国家自然科学基金资助项目(51178101
51208104
51378112)
江苏省自然科学基金资助项目(BK2012344)
关键词
桥梁结构
颤振时域分析
自激力脉冲响应函数
重启动迭代
bridge structure
time-domain flutter analysis
self-excited impulse response function
restart iteration
