WANG Mingjun,TANG Tingxuan,HE Jun.Numerical Simulation and Analysis of Seismic Performance of High Voltage Transformer⁃bushing Systems[J].Journal of Disaster Prevention and Mitigation Engineering,2023,43(03):526-534.
WANG Mingjun,TANG Tingxuan,HE Jun.Numerical Simulation and Analysis of Seismic Performance of High Voltage Transformer⁃bushing Systems[J].Journal of Disaster Prevention and Mitigation Engineering,2023,43(03):526-534.DOI:
Numerical Simulation and Analysis of Seismic Performance of High Voltage Transformer⁃bushing Systems
To establish a numerical simulation method for seismic performance of high-voltage transformer-bushing systems and to design a preliminary plan for ground vibration simulation shaking tests, this paper develops a finite element analysis method for analyzing seismic performance of the OSSZ11-240000/220 transformer using the ABAQUS software, whereby their natural vibration characteristics and seismic response of key parts of the transformer-bushing system under consideration are simulated. Based on the simulation results, the influence of the stiffness of the transformer tank’s top plate on the seismic performance of the bushing, the dynamic amplification factor of the bushing root, and the characteristics of the bushing seismic response are analyzed. The results show that:(1) the lower stiffness of the transformer tank’s top plate will reduce the natural frequency of the bushing and amplify its seismic response, and the dynamic coupling between multiple bushings on the top plate of the tank will alter their seismic responses; (2) the dynamic amplification factor of the high-voltage bushing root reaches up to 5.14, which is much higher than the recommended value of the specification; (3) the comparison of modal and dynamic analysis results between the scaled model and the original model confirms the validity of the scaled model. The proposed finite element method can be used for the numerical simulation analysis of the seismic performance of high-voltage transformer-bushing systems, and the formulation of a preliminary plan for shaking table test of ground vibration simulation for these systems.
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