Bechtel Marine Propulsion Corporation
This report discusses an analysis of gas foil thrust bearings used in the Integrated Systems Test (IST) turbomachinery. Gas foil thrust bearing failures occurred in IST turbomachinery during operational testing at Barber-Nichols Inc. This paper presents preliminary results of a study to assess, by means of multiphysics analyses, the performance characteristics of the foil thrust bearing over ...
C. Buffinton, P. Rogerson, and D. Ebenstein
The effects of calcifications on arterial wall stress have been largely ignored, in part because the material properties of the calcified areas were taken to be the same as the fibrous plaque, and in part because they are often assumed to have a stabilizing influence. Recent measurements suggest that their stiffness should be more similar to bone. A computational model is indicated for this ...
H. Diaz-Alvarez, R. Costley, D. Whitlow, M. McKenna, C. Williamson, and O. Taylor
US Army Engineer & Development Center
Previous studies have determined that bridges radiate acoustic energy in the infrasonic frequency range. Initial interest in this topic was the result of trying to identify sources of infrasound recorded at stations deployed near bridges. A Finite Element model has been developed for a Pratt truss railroad bridge located at Ft. Leonard Wood, MO. The model consists of 3-D Euler beam elements ...
Modeling and Simulation of Circular and Square Diaphragm Absolute Micro Pressure Sensors using COMSOL
M. Sundaram, A. Simha, S M. Kulkarni, and S. Bhat
Department of ICE, Manipal Institute of Technology, Manipal, India
Department of Mechatronics, National Institute of Technology, Suratkal, India
Department of Mechanical, National Institute of Technology, Suratkal, India
Department of E&C, Manipal Institute of Technology, Manipal, India
The aim of this paper is to model and simulate a Circular and Square diaphragm absolute micro pressure sensors. With the applied pressure, the change in deflection and stress pattern of the diaphragm is analytically determined. The structures are then simulated using COMSOL Multiphysics®. The results obtained from analytical equations are compared with simulated results. The range and ...