3-dimensional stress analysis of superheater headers

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 finite element model was developed to simulate the superheater header geometry. ADINA, a finite element program for automatic dynamic incremental nonlinear analysis, is used to evaluate the stresses present in the header particularly the stresses that are present in the tube to header welds. The model that is used evaluates the stresses induced by both pressure and thermal loadings. This is part of a continuing study of high pressure and high temperature boiler components.http://archive.org/details/3dimensionalstre00barnLieutenant Commander, United States NavyApproved for public release; distribution is unlimited