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Wednesday, July 10 • 11:50 - 12:10
TURBO–GENERATOR FOUNDATION DYNAMIC STIFFNES ANALYSIS

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The objective of this paper is the dynamic analysis of power plant turbo–generator foundation structure (TGFS) of electrical industry operation. Main purpose of performed study in 2017 was to check dynamic stiffness TGFS after fifty years TG (100 MW) performance and to design renovation and strengthening of TGSF. The dynamic analysis of TGFS of two parts: (i) analytical approach with initial numerical FEM1 analysis and (ii) experimental analysis of existing foundation structure via its experimental dynamic response due to vibration mechanical exciter and impulse apparatus LFWD (Light Falling Weight Device). Results of the experimental tests (ET) in situ then enabled to design of the existing foundation structure strengthening for the future TG performance and then update initial foundation structural model for final numerical analysis. According to the TGFS experimental analysis results and numerical calculation results was created updated FEM2 foundation structural model for calculation of the predicting dynamic response of the strengthening foundation structure (FS). The objectives of the final numerical calculation results were: calculation of vibration natural frequencies and corresponding modes (free vibration analysis, eigen analysis); dynamic amplitude calculation due to turbine operation and critical regimes to check that the same are within the acceptable relevant code limits (e.g. ISO 1940–1); dynamic response due to seismic acting and dynamic stresses amplitude calculation to check the stresses induced in the different structural element like beams, columns and slabs (pseudo–static analysis). After the finishing of TGFS strengthening works there are planed final experimental tests to determine of turbo–generator foundation structure real dynamic stiffness via comparison of measured real structure dynamic response parameters values to final numerical calculation results.


Wednesday July 10, 2019 11:50 - 12:10 EDT
Outremont 4
  T06 Industr. and occup. Noise & vib., SS04 Adv in machin noise & vibr cntrl

Attendees (3)