To investigate the applicability of the added-mass method and the fluid-structure interaction interface(FSI)method for analyzing the dynamic characteristics of radial gates,firstly,by establishing a finite element model of radial gate,the reasonable value of fluid length in FSI method was studied by convergence analysis,ensuring the calculation accuracy of natural frequency of fluid-radial gate system.Secondly,the simulation results of the fluid-structure interaction effect of the radial gate using the added-mass method and FSI method are compared from the perspective of the head height and stiffness of the radial gate,and the applicability of the simplified added-mass method was discussed.Finally,the influence of fluid-structure interaction effect on the dynamic characteristics of radial gate was discussed based on the numerical results of finite element calculations.The results show as follows:1)the unboundedness of the fluid can be simulated by the length of twice the water head in the FSI method;2)In the case of lower water head and greater stiffness,using the added-mass method to simulate the fluid-structure interaction effect can improve calculation efficiency while ensuring calculation accuracy.As the water head increases,the accuracy decreases.At this point,the natural vibration frequency of the radial gate significantly decreases,and the main deformation is transferred from the support arm to the panel.It is necessary to use the FSI method instead of the added-mass method to ensure calculation accuracy.
关键词
弧形闸门/流固耦合/附加质量法/FSI法/自振频率
Key words
radial gate/fluid-structure interaction/added-mass method/FSI method/natural vibration frequency
维普
万方数据