A Correlation Study on the Spectrum Decomposition Method

by David T. Tang, Westinghouse Electric Corp, Equipment Qualification &, Testing, Pittsburgh, PA, USA,
David E. Scherf, Westinghouse Electric Corp, Equipment Qualification &, Testing, Pittsburgh, PA, USA,
James Parello, Westinghouse Electric Corp, Equipment Qualification &, Testing, Pittsburgh, PA, USA,
Paul T. Smith, Westinghouse Electric Corp, Equipment Qualification &, Testing, Pittsburgh, PA, USA,



Document Type: Proceeding Paper

Part of: Structural Engineering in Nuclear Facilities

Abstract: The major elements of the Spectrum Decomposition Method (SDM) are reviewed together with its automated process for generation of in-equipment response spectra (IERS). The floor required response spectrum and the equipment dynamic properties of the predominant modes of vibration serve as the input data to the method. The data correlation is performed to compare the SDM generated in-equipment response spectra with those obtained previously from time history analyses and shaking table testing qualification programs. Good correlation results are demonstrated for five typical equipment configurations which cover various capability features of the method. The correlation study confirms the adequacy of the Spectrum Decomposition Method for use in seismic qualification programs. The potential application of the method is also discussed in light of the estimated equipment dynamic properties.

Subject Headings: Dynamic properties | Decomposition | Correlation | Response spectra | Equipment and machinery | Dynamic structural analysis | Data analysis | Structural dynamics

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