摘要
研究精细时程积分法在悬索桥颤振稳定性分析中的应用。首先 ,将结构和气流整个作为一个系统 ,组集系统关于模态广义坐标的状态空间方程。然后 ,应用精细时程积分法计算状态向量的时程响应 ,根据状态向量时程响应的对数衰减率判断系统的颤振稳定性。最后 ,以英国塞文悬索桥为数值算例 ,验证了本文方法的正确性。
The application of the precise time-integration method in the flutter stability analysis of suspension bridges is studied. Firstly, the bridge structure is combined with wind as a whole system, and the system's state-space equation about the generalized coordinates of modes is assembled. Then, the time-history of the state-space vector is computed by the precise time-integration method. According to the logarithmic decrement of the time-history of the state-space vector, the stability of the system is estimate. Finally, the British Severn Bridge is analyzed to confirm the method.
出处
《计算力学学报》
CAS
CSCD
北大核心
2001年第3期316-320,共5页
Chinese Journal of Computational Mechanics
基金
国家自然科学基金资助项目 (5 95 780 0 1 )
关键词
悬索桥
颤振稳定性
精细时程积分法
suspension bridges
flutter stability
precise time-integration method
