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Stress analysis of the LHA-1 class superheater header by finite element method.

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Author
Kaufmann, Jon W.
Date
1987-06
Advisor
Cantin, G.
Second Reader
Wilson, E.L.
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Abstract
Numerous cracks and leaks in the superheater header tube attachment welds in the LHA-1 class of amphibious assault ships have prompted an investigation by the Naval Sea Systems Command (NAVSEA). This thesis describes the stress analysis of the superheater header tube attachment region using a three dimensional axisymmetric Finite Element model. The SAP 80 structural analysis program was utilized to conduct the analysis. Both pre and post processors were employed to obtain graphical representations of the model as well as the results of the stress analysis. This thesis focuses primarily on thermally induced stresses produced in the header. Some results obtained for a nominal 100 Degree F temperature drop across the thickness of the superheater header wall yielded a maximum hoop stress of 19.01 (Ksi) and a maximum in plane stress of 1.58 (Ksi).
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This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
URI
http://hdl.handle.net/10945/22506
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  • 1. Thesis and Dissertation Collection, all items

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    2-dimensional axisymmetric and 3-dimensional finite element stress analysis of the LHA-1 class superheater header/ 

    Kitchin, Doyle R. (Monterey, California. Naval Postgraduate School, 1988-03);
    ADINA, a finite element program for automatic dynamic incremental nonlinear analysis, is used to conduct a stress analysis of the Tarawa class (LHA-1) superheater header. This investigation is sponsored by the Naval Sea ...
  • Thumbnail

    3-dimensional stress analysis of superheater headers 

    Barnes, Jonathan D. (Monterey, California. Naval Postgraduate School, 1989-12);
    Naval Sea Systems Command (NAVSEA) initiated an investigation of the Tarawa Class (LHA-1) superheater headers due to the reoccurance of numerous crack and leaks in the tube to header attachment welds. A dimensional solid ...
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    Photoelastic study of interrupted pressure vessel frames 

    Ballantine, James Clement, Jr. (Massachusetts Institute of Technology, 1967-06);
    The objective of this thesis is to obtain an understanding of the variation in stress on the cardinal axes of a circular penetration with elliptical reinforcements in a simulated stiffened cylindrical pressure vessel. The ...
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