Results 21 to 30 of about 10,039,203 (328)
The natural frequencies of masonry beams [PDF]
Archive of Applied Mechanics, 2021 The present paper aims at analytically evaluating the natural frequencies of cracked slender masonry elements. The problem is dealt with in the framework of linear perturbation, and the small oscillations of the structure are studied under loaded conditions, after the equilibrium for permanent loads has been achieved.
openaire +3 more sources
Applied Mechanics, 2021 This paper deals with the modal analysis of optimized trapezoidal stiffened plates with simple supported conditions on the four edges of the base plate. The main objective of the finite element analysis is to investigate the natural frequencies and mode ...
Zoltán Virág, Sándor Szirbik
doaj +1 more source
Methods for Separating Close Natural Frequencies
Volume 4: Fluid-Structure Interaction; High Pressure TechnologyAbstract When close natural frequencies occur, they may cause complications when performing experiments and require special attention and treatment in modelling. It is shown that close and even identical natural frequencies can occur in linear structures. However, these are unlikely to occur if one parameter in the system is varied in an
Goyder, Hugh
openaire +3 more sources
Diagnostic and Prognostic Research, 2021 Clinical prediction models are developed with the ultimate aim of improving patient outcomes, and are often turned into prediction rules (e.g. classifying people as low/high risk using cut-points of predicted risk) at some point during the development ...
K. Hemming, M. Taljaard
doaj +1 more source
Delamination localisation and length estimation in composite laminate beam by VSHM and pattern recognition methods [PDF]
, 2010 The focus of this work is to investigate the delamination damage in laminate composite beams, to fix a Vibration-based structural health monitoring (VSHM) method for the laminate structures.
Palazzetti, Roberto +7 more
core +1 more source
On a Fast Analytical Approximation of Natural Frequencies for Photovoltaic Modules
, 2020 In this paper, an eigenvalue problem is considered, i.e., the free vibration of photovoltaic (PV) modules. This structure was selected for its peculiar layer contrast, which forms an anti-sandwich.
Bergmann, Stefan +3 more
core +1 more source
Understanding test accuracy research: a test consequence graphic
Diagnostic and Prognostic Research, 2018 Background Presenting results of diagnostic test accuracy research so that it is accessible to users is challenging. Commonly used accuracy measures (e.g. sensitivity and specificity) are poorly understood by health professionals and the public. Evidence
Penny Whiting, Clare Davenport
doaj +1 more source
Investigation of Resonance Avoidance Method for Vacuum Cleaner
IEEE Open Journal of Industry Applications, 2023 Electromagnetic resonance in electric motors arises when the electromagnetic force frequency coincides with any of the motor's natural frequencies, causing excessive vibration and noise.
Woong Hwang +4 more
doaj +1 more source
EEMD-MUSIC-based analysis for natural frequencies identification of structures using artificial and natural excitations. [PDF]
ScientificWorldJournal, 2014 This paper presents a new EEMD-MUSIC- (ensemble empirical mode decomposition-multiple signal classification-) based methodology to identify modal frequencies in structures ranging from free and ambient vibration signals produced by artificial and natural
Camarena-Martinez D +5 more
europepmc +2 more sources
Determination of the natural frequencies of a prototype Kaplan turbine [PDF]
, 2022 The natural frequencies of a turbine can be calculated from numerical methods. By comparing these natural frequencies with excitation sources, one can know the danger of a resonance and a possible failure in a component of the turbine.
Valentín Ruiz, David +4 more
core +1 more source