Research on Virtual Test of Shaker Transformer Structure under Basic Excitation
In order to solve the strength problem of the transformer structure caused by the basic excitation of the shaker,the dynamic characteristics of the two types of trans-former structures are studied with the virtual test technology and vibration theory.Based on the virtual test model under the basic excitation condition,the mode analysis theory is applied to analyze the mode shape and natural frequency of the transformer struc-ture,and its weak links are obtained.Using the modal superposition method and tran-sient dynamics theory,combined with the Rayleigh damping model,the stress and de-formation contours of the two types of the transformer structure under sine signal excita-tion and half-sine wave impact are obtained.The results show that the lateral direction of the transformer structure of the two configurations is the weakest direction of the structure.The shortening of the unilateral length of the long-side base by 25 mm has a significant effect on the base frequency and the deformation at the resonance point un-der the sine signal excitation,but has little effect on the high frequency,mode shape,the stress at the resonance point under sine signal excitation and the dynamic strength under the impact of the half-sine wave.The high value of the impact overload has a significant impact on the dynamic characteristics of the two configurations under the im-pact of the half-sine wave.The research results can provide a theoretical basis for the optimal design of the transformer structure.
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