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Verifying Computations for Advanced Problems in Power Piping with in Situ Measurement

  • Zs. Révész
  • F. Ferroni
  • L. Bollok
Conference paper

Abstract

The paper presents two cases in which in situ measurement in a power plant helped to produce reliable computational estimates for advanced problems in power piping systems. In both cases — a transient and a steady-state vibration problem — the objective was to identify the effects of flow-induced piping vibration with minimal expenditure of time and money. Both cases belong into the category of unanticipated vibration problems, which could cause piping failure.

In the first case transient effects of loss of power to operating pumps in a service water piping have been investigated computationally. The measurement was used to prove the suitability of the model used for hydraulic and structural analysis. The paper describes the models used and compares measured time histories with computational estimates.

In the second case during preoperational testing a steady-state vibration problem has been analysed by combining test and computation. A comprehensive numerical treatment of the phenomenon in this case would have been prohibitively expensive, if possible at all. The paper describes the procedure followed and compares measured values with computational estimates.

The paper highlights how relatively simple measurements can provide important information for experimental verification of sophisticated computations in the engineering praxis.

Keywords

Mode Shape Response Spectrum Cooling Water System Computational Estimate Modal Superposition 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. ASME (1977): Boiler and Pressure Vessel Code, Section III, Division 1, Subsection NC—Class 2 Components, New York, ASME, 1977 ed. incl. Winter 1979 Add.Google Scholar
  2. Belytschko T., J.I. Lin, Ch.—Sh. Tsay (1982): Modal Recovery Methods for Solution of Fluid—Structure Problems with Rigid Wall Loads (unpublished manuscript), Evanston, Northwestern University, p. 38Google Scholar
  3. Révész Zs. (1983a): Analysis of Hydrodynamic Transients in Thin—Walled Piping Applying Mass—Correcting Forces, in Transactions of the 7th Int. Conf. on Structural Mechanics in Reactor Technology, Amsterdam, Elsevier Science Publishers, 1983, Vol. B, pp 219 - 228Google Scholar
  4. Révész Zs. (1983b): P.A.I.D. — An Interactive Graphic Package to Support Piping Analysis, in Engineering Software III, ed. by R.A. Adey, Berlin, Springer Verlag, 1983, pp. 679 - 694Google Scholar
  5. Révész Zs. (1983c): Modal Analysis of Piping Structures, in Proc. of Pannonian Applied Mathematical Meeting, Vienna, July 1983 8 - 45Google Scholar
  6. USNRC (1976): Combining Modal Responses and Spatial Components in Seismic Response Analysis, Regulatory Guide 1.92, Revision 1, Washington D.C., USNRC, 1976Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 1984

Authors and Affiliations

  • Zs. Révész
    • 1
  • F. Ferroni
    • 1
  • L. Bollok
    • 2
  1. 1.Electrowatt Eng. Services Ltd.SwitzerlandZurichSwitzerland
  2. 2.Leibstadt Nuclear Power PlantLeibstadtSwitzerland

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