平面钢闸门流固耦合分析与优化设计

Fluid-solid Coupling Analysis of the Panel Steel Gate and its Structural Optimization

针对潜孔平面钢闸门在启闭过程中,受水流脉动压力荷载作用可能引起强烈振动而容易发生破坏的问题,以某引水工程取水口工作闸门为例,运用有限元软件,采用流固耦合法,对平面钢闸门进行了流固耦合分析,得到闸门的自振频率;通过对闸门进行水动力学模型试验分析,得到作用在闸门底缘上的脉动压力能量主要集中在20Hz以内,并以此预测出闸门有产生共振的风险。为防止闸门在运行中产生共振,对闸门进行优化设计。结果表明,通过提高闸门的自振频率,使闸门的自振频率远离脉动水流高能区,能够有效预防闸门产生共振的风险。

In the opening and closing process of the sluice gate of the submersible plane,a strong vibration could appear which is caused by the pressure load of the stream pulsating.In order to solve the problem,take a water intake gate of water diversion project as an example,the finite element software and fluid solid coupling method are adopted to analyze the fluid structure interaction of the plane steel gate and the natural frequency of the gate.Based on the hydrodynamic model test analysis of the gate,the pulsating pressure energy on the gate body is mainly within 20 Hz,which means there are resonance risks in the panel steel gate.In order to prevent the gate from resonating during its operation,the design of the gate is also optimized.The results show that by improving gate＇s natural frequency and making the gate＇s natural frequency far away from the high energy area of the pulsating flow can effectively prevent the resonance risk generated by the gate.