Dynamic FEM analysis is valid for designing rotating machinery to reduce its vibration problem when we may ensure enough accuracy of the analysis. Surrogate multiple objective optimization method is one of the most effective methods for structural identification improving the FEM analysis model of a structure to adjust the natural frequency analysis results to the experimental results. In this study the structural identification method is applied to stator end-windings of a turbine generator to determine the Young's modulus of the principal components on the FE model minimizing the analysis errors of the natural frequencies of the 2-lobe and 4-lobe circular modes to the corresponding experimental results. The accurate FE model of the end-windings is obtained by this method.
In this study we investigate a dynamic damper to reduce electro − magnetic vibration of elec 重 ric rot 裂 ting machinery as turbine generator . ln a turbine generatoら the ro 重 ating electro − magnetic pult force of rotor induced by the rotor causes the sta 重 or core yibration consists of the oyal deformation rotating synchronously with the rotor . Two oval na 加 ral modes of the st蹠 or core are conj 閥 gate, so the mag 闘 i加 de of vibra 重 ion on the sur 伽 ce around the stator core is ide 繭 ticaL Using a mass damper to the sta 重or core , one of the responses of the ova [natural modes c 跚 be reduced , and we get the stationary deformation shape on the stator core fbr the electro −magne 重 ic force. We can e 伍 cient [ y reduce thetr 跚 smission ofthe electrD − magnetic vibration ω the base of the generator from the stator core by supporting the stator core 飢 the node points o 『the stationary oval
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