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针对大型平面钢闸门的流激振动问题,制作了大型平面钢闸门的水工模型,通过水力学试验研究了闸门脉动压力特性;并制作弹性相似模型,采用试验模态分析法研究闸门的结构动特性、运用三维有限元数值模拟手段计算闸门的自振特性。对比发现,闸门自振频率的计算值与试验值非常接近,振型完全一致,通过数值计算可考察流固耦合效应对闸门动特性的影响。基于水力学试验采用动力时程方法计算了闸门流激振动响应,评价了闸门的抗振安全,可为闸门结构的优化设计提供依据。
Aiming at the problem of flow shock in large-scale planar steel gate, the hydraulic model of large-scale planar steel gate was made. The hydraulic characteristics of the gate were studied by hydraulic test. And the elastic similarity model was made, and the structural modal analysis Characteristics, the use of three-dimensional finite element numerical simulation method to calculate the natural vibration characteristics of the gate. The calculated results show that the calculated natural frequency of the gate is very close to the experimental value and the mode shapes are exactly the same. The influence of the fluid-structure interaction on the dynamic characteristics of the gate can be investigated by numerical calculation. Based on the hydrodynamic test, the dynamic response of the gate was calculated by dynamic time-history method to evaluate the anti-vibration safety of the gate, which can provide the basis for the optimal design of the gate structure.