Results 121 to 130 of about 4,342 (233)
Eigenfrequency Shift Mechanism due to an Interior Blockage in a Pipe
, 2018 The presence of blockages in water supply systems wastes energy, decreases system performance, and may pose safety concerns. Previous research showing that blockages induce a shift in the resonant frequencies (eigenfrequencies) of the pipe system made ...
Mohamed S. Ghidaoui +3 more
core +1 more source
LOSS FACTOR AND DYNAMIC YOUNG MODULUS DETERMINATION FOR COMPOSITE SANDWICH BARS REINFORCED WITH STEEL FABRIC [PDF]
Fiabilitate şi Durabilitate, 2015 In this paper I have build some composite sandwich bars. For these bars I have determined the dynamic response by recording their free vibrations. These bars have the core made of polypropylene honeycomb with upper and lower layers reinforced with ...
Cosmin-Mihai MIRIŢOIU
doaj
Proceedings in Applied Mathematics and Mechanics, Volume 26, Issue 2, June 2026.ABSTRACT The use of parametric model order reduction (pMOR) by matrix interpolation enables efficient simulation of large‐scale finite element (FE) models in multi‐query applications such as optimization and uncertainty quantification. In this method, high‐fidelity systems are sampled, individually reduced by projection‐based model order reduction, and
Sebastian Resch‐Schopper +1 more
wiley +1 more source
Ultrasound Characterization of Plastic Bonded Explosives With Varied Binder Content and Density
Propellants, Explosives, Pyrotechnics, Volume 51, Issue 6, Page 966-975, June 2026.ABSTRACT Advanced explosive formulations and methods of production require rapid characterization for both processes and materials. Here, we present results for ultrasound characterization of a plastic bonded explosive (PBX) formulation as a function of binder weight percent and pressing density using through‐transmission sound speed measurements.
Jordan S. Lum +6 more
wiley +1 more source
Journal of Geophysical Research: Space Physics, Volume 131, Issue 6, June 2026.Abstract Nonlinear simulations of the feedback instability in the Alfvénic magnetosphere‐ionosphere (M‐I) coupling system have been carried out by means of the reduced magnetohydrodynamic (MHD) equations with spatially non‐uniform kinematic viscosity and resistivity, coupled with two‐fluid equations, in order to investigate auroral fine‐structure ...
T. Sakaki, T.‐H. Watanabe
wiley +1 more source
Bragg-Type Resonance in Blocked Pipe System and Its Effect on the Eigenfrequency Shift
, 2018 Recent studies of measured transient pressure signals showed that eigenfrequencies shift with changes in cross-sectional area of the conduit and used this fact to develop blockage-detection algorithms.
Mohamed S. Ghidaoui +7 more
core +1 more source
TMD Damping for Structures with Uncertain Modal Parameters
Applied SciencesThe optimum tuning of the natural frequency and damping ratio of TMDs for structural modal parameters and various optimization criteria are well-known from the literature.
Felix Weber
doaj +1 more source
Applied SciencesThis study explores the integration of computer vision with topology optimization for additive manufacturing, with a focus on maximizing eigenfrequency in a design domain.
Musaddiq Al Ali +2 more
doaj +1 more source
Experimental Study of the Eigenfrequency Shift Mechanism in a Blocked Pipe System
, 2017 Eigenfrequency shift in a pipe with a blockage is investigated experimentally. The experimental test rig consists of a reservoir-pipe-valve (RPV) system that contains a single partial blockage. Blockages with different lengths are considered.
Mohamed S. Ghidaoui +7 more
core +1 more source
, 2017 A transition piece has responsibility to transmit forces from one member to another member. But when doing it, the transition piece must be stiff enough. Studying what parameter of the transition piece is contributing to the stiffness the most, will give
Mohamed, Kamal
core