Journal of Pressure Vessel Technology: Recent submissions
Now showing items 1401-1420 of 4506
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On the Coincidence of the Acoustical and Mechanical Natural Frequencies of a Pressure Vessel
(The American Society of Mechanical Engineers (ASME), 2013)A widespread conception among field engineers is that the coincidence of the structure and of the acoustic frequencies of a pressure vessel triggers a dramatic increase in the vibration level, leading to fatigue failure. ... -
Estimation of the Time Delay Associated With Damping Controlled Fluidelastic Instability in a Normal Triangular Tube Array
(The American Society of Mechanical Engineers (ASME), 2013)Fluidelastic instability (FEI) produces large amplitude selfexcited vibrations close to the natural frequency of the structure. For fluidelastic instability caused by the damping controlled mechanism, there is a time delay ... -
An Experimental Study of Flow Induced Vibration and the Associated Flow Perturbations in a Parallel Triangular Tube Array
(The American Society of Mechanical Engineers (ASME), 2013)The results of an experimental investigation of the flow perturbations associated with tube vibrations along the interstitial flow path are presented. A parallel triangular tube array consisting of seven rows and six columns ... -
Time Domain Simulation of the Vibration of a Steam Generator Tube Subjected to Fluidelastic Forces Induced by Two Phase Cross Flow
(The American Society of Mechanical Engineers (ASME), 2013)Having previously verified the quasisteady model under twophase flow laboratory conditions, the present work investigates the feasibility of practical application of the model to a prototypical steam generator (SG) tube ... -
Development of Leak Before Break Assessment Method for Japan Sodium Cooled Fast Reactor Pipe—Part 1 Crack Opening Displacement Assessment of Thin Wall Pipes Made of Modified 9Cr 1Mo Steel
(The American Society of Mechanical Engineers (ASME), 2013)This was carried out to establish crack opening displacement (COD) evaluation methods used in leakbeforebreak (LBB) assessment of sodium pipes of the Japan sodium cooled fast reactor (JSFR). For sodium pipes of JSFR, the ... -
Microstructure and Mechanical Properties of Fiber Laser Metal Active Gas Hybrid Weld of X80 Pipeline Steel
(The American Society of Mechanical Engineers (ASME), 2013)Fiber lasermetal active gas (MAG) hybrid welding process was explored to join X80 pipeline steel to improve the efficiency and performance of pipeline welding. During the hybrid welding process, five different positions ... -
Fabrication Uncertainty in B2 for Nuclear Pipe Bends Subjected to In Plane Opening Moment
(The American Society of Mechanical Engineers (ASME), 2013)For reliabilitybased design of pipe bends and elbows, a probabilistic characterization of the primary stress indices (B1 and B2) is essential. This paper aims at the characterization of the fabrication/geometric uncertainty ... -
Critical Assessment of a Local Strain Based Fatigue Crack Growth Model Using Experimental Data Available for the P355NL1 Steel
(The American Society of Mechanical Engineers (ASME), 2013)Fatigue crack growth models based on elastic–plastic stress–strain histories at the crack tip region and strainlife damage models have been proposed in the literature. The UniGrow model fits this particular class of ... -
Package Impact Models as a Precursor to Cladding Analysis1
(The American Society of Mechanical Engineers (ASME), 2013)The evaluation of spent nuclear fuel storage casks and transportation packages under impact loading is an important part of cask and package certification by the United States Nuclear Regulatory Commission. Finite element ... -
Fluidelastic Instability Modeling of Loosely Supported Multispan U Tubes in Nuclear Steam Generators
(The American Society of Mechanical Engineers (ASME), 2013)Steam generators in nuclear power plants have experienced tube failures caused by flowinduced vibrations. Two excitation mechanisms are responsible for such failures; random turbulence excitation and fluidelastic instability. ... -
Contributions of Fluid to Rocking–Bulging Interaction of Rectangular Tanks Whose Walls Are Rigid and Bottom Plate Rectilinearly Uplifts
(The American Society of Mechanical Engineers (ASME), 2013)At the event of severe earthquakes, the tank rocking response appears subsequent to the tank bulging response. A springmassrigid body combined model was proposed for analyzing the tank response and the required quantities ... -
Drag Coefficient and Two Phase Friction Multiplier on Tube Bundles Subjected to Two Phase Cross Flow
(The American Society of Mechanical Engineers (ASME), 2013)An approximate analytical model, to predict the drag coefficient on a cylinder and the twophase Euler number for upward twophase crossflow through horizontal bundles, has been developed. To verify the model, two sets of ... -
Flowforce in a Safety Relief Valve Under Incompressible, Compressible, and Two Phase Flow Conditions (PVP 2011 57896)
(The American Society of Mechanical Engineers (ASME), 2013)The use of relief valves is crucial for the safety of power plants. Indeed, these valves, simple but robust in their design, provide the ultimate protection when all other safety systems are inadequate. This study is focused ... -
Structural Acoustic Vibration Problems in the Presence of Strong Coupling
(The American Society of Mechanical Engineers (ASME), 2013)Free vibrations of fluid–solid structures are governed by unsymmetric eigenvalue problems. A common approach which works fine for weakly coupled systems is to project the problem to a space spanned by modes of the uncoupled ... -
Thermomechanical Analysis of a Pressurized Pipe Under Plant Conditions
(The American Society of Mechanical Engineers (ASME), 2013)This paper is concerned with the development of a methodology for thermomechanical analysis of high temperature, steampressurized P91 pipes in electrical power generation plant under realistic (measured) temperature and ... -
Boiling Water Reactor Pressure Vessel Integrity Evaluation by Probabilistic Fracture Mechanics (PVP2010 25195)
(The American Society of Mechanical Engineers (ASME), 2013)The reactor pressure vessel (RPV) welds unavoidably degrade with the long time operation because of the fast neutron fluence exposure. Thus, the structural integrity of the axial and circumferential welds at the beltline ... -
A Simplified Strength Checking Approach for a Header–Nozzle Intersection Under Combined Piping Loads
(The American Society of Mechanical Engineers (ASME), 2013)To investigate the strength checking methods for a semicylindrical header–nozzle intersection under combined piping loads, the simplified strength checking formulae for two piping load combinations, which are typical in ... -
Pipe Elbows Under Strong Cyclic Loading
(The American Society of Mechanical Engineers (ASME), 2013)Motivated by the response of industrial piping under seismic loading conditions, the present study examines the behavior of steel process piping elbows, subjected to strong cyclic loading conditions. A set of experiments ... -
Hypergravity and Multiple Reflections in Wave Propagation in the Aorta
(The American Society of Mechanical Engineers (ASME), 2013)Hypergravity and gravity changes encountered in, e.g., airplanes, rollercoasters, and spaceflight can result in headaches or loss of consciousness due to decreased cerebral blood flow. This paper describes the effect of ... -
Comparison of Elastic and Plastic Reference Volume Approaches
(The American Society of Mechanical Engineers (ASME), 2013)For finding out reliable limit load multipliers in pressure vessel components or structures using simplified limit load methods, proper estimation of reference volume is important. In this paper, two empirical methods ...