Research Of Several Vibration Problems About Turbine Power Plant

In recent years, as the growing expansion of power industry, the construction projects of power plants across our country have developed rapidly, furthermore, it’s a trend that the capacity of turbo generator set becomes large and super large. However, with the construction of large power plants, a lot of problems about the power plant structure design appeared, especially the vibration problems about turbine power plant. Due to the complicated vibration problems with many vibration sources in turbine plant, these problems are researched from two aspects, one is to ensure the turbine generator set operate normally, the other is to reduce or eliminate the impact on surrounding buildings.On one hand, in order to ensure the turbine generator set operate normally, the dynamic property of a turbo generator frame foundation is studied, including its self-vibration characteristics and forced vibration response, based on the existing research results, corresponding design code and the ANSYS finite element analysis technology. Meanwhile, through analysis of the dynamic property and calculation, the optimization method based on APDL of turbo generator frame foundation is discussed.On the other hand, combined with the structure design of GIS distribution room in HuaNeng ChangXing power plant, the analogy analysis method has been adopted and the turbine plant of YueQing power plant second phase has been chosen as a test site. Measuring-points arrangement and vibration measurement are done according to preliminary design scheme. Through the corresponding analysis of test data and the combination of quantitative and qualitative research about vibration in turbine plant, instruction about surrounding building design and instrument arrangements is provided. Besides, some vibration reduction or isolation methods are also proposed.