Analysis of Dynamic Properties of Aqueduct-Water Coupling Systems with Rubber Bearings

Abstract

Dynamic properties of Aqueduct-water coupling systems with rubber bearings were studied in this paper by considering the actual nonlinear influence of rubber bearings. In order to reflect the actual rubber bearings, Mooney-Rivlin model was applied to simulate the rubber material property and the steal panel was considered as two dimension solid model. The nonlinear contact was considered between rubber and steal panel. Fluid potential method was used to simulate the water in aqueduct by considering the fluid-structure coupling interaction. Once the finite element model of aqueduct-water coupling system with rubber bearings was developed, the frequency and the mode shapes were calculated for different depths of water. Compared with the dynamic properties of aqueduct-water coupling system without rubber bearings, the results show that the rubber bearings were effective in reducing the frequency of aqueduct structure, and the fluid-structure coupling system was shown the vibrational modes of aqueduct structure without the mode shape of water. This indicates that the mode shape of the fluid-structure coupling system was changed due to the nonlinear property of rubber bearings. KEYWORD: aqueduct; rubber bearings; fluid-structure coupling; dynamic property