偏心荷载作用下弧形闸门支臂的动力稳定性研究

Research on the Dynamic Stablity of Arms in the Radial Gate Under Eccentric Loading

弧形闸门的动力失稳往往是由于支臂在动力荷载作用下丧失动力稳定的,支臂的动力稳定与否控制着整个水闸的泄洪安全.本文从弹性稳定理论角度出发,介绍了支臂动力稳定的分析方法,建立了支臂动力稳定分析的计算模型,求解了支臂在偏心荷载作用下的动力不稳定区域,以嘉陵江新政工程弧形闸门为工程实例讨论荷载偏心对支臂动力不稳定区域的影响.结果表明,荷载偏心增大了支臂的动力不稳定区域,不利于支臂的动力稳定.

The dynamic - instability of radial gate was always due to the instability of arm under dynamic load- ing action, the security of gate spillway was dominated by the dynamic stability of arms. This paper introduced the dynamic - stability analysis methods of the arm by using the theory of elastic stability, established the dynamic - stability calculating model of the arm, ascertained the dynamic - instability district of the arm and discussed the influences of the dynamic - instability under eccentric loading based on the radial gate of the Xinzheng project on the Jialing River. Based on the analyzing results, the eccentric loading increased the dynamic - instability district of the arm and would be adverse to its dynamic -stability.