Results 11 to 20 of about 12,187,245 (343)
Beam Damage Assessment Using Natural Frequency Shift and Machine Learning. [PDF]
Sensors (Basel), 2022 Damage detection based on modal parameter changes has become popular in the last few decades. Nowadays, there are robust and reliable mathematical relations available to predict natural frequency changes if damage parameters are known.
Gillich N +6 more
europepmc +2 more sources
Assessment of bridge natural frequency as an indicator of scour using centrifuge modelling. [PDF]
J Civ Struct Health Monit, 2020 One of the most prevalent causes of bridge failure around the world is “scour”—the gradual erosion of soil around a bridge foundation due to fast-flowing water.
Kariyawasam KD +4 more
europepmc +3 more sources
Dynamic Arithmetic Optimization Algorithm for Truss Optimization Under Natural Frequency Constraints
IEEE Access, 2022 Metaheuristic algorithms have successfully been used to solve any type of optimization problem in the field of structural engineering. The newly proposed Arithmetic Optimization Algorithm (AOA) has recently been presented for mathematical problems.
Nima Khodadadi +2 more
semanticscholar +1 more source
The Evaluation Method of Rock Mass Stability Based on Natural Frequency
, 2021 The limit equilibrium method’s analysis index cannot be measured by on-site monitoring equipment and cannot be used for monitoring and early warning of rock instability. The existing rock stability evaluation methods based on vibration information cannot
M. Xie +4 more
semanticscholar +1 more source
Experimental study and numerical modeling of vibrational characteristics of a 500W PEM fuel cell stack [PDF]
Hydrogen, Fuel Cell & Energy Storage, 2022 A PEM fuel cell is considered a system with a complex mechanical structure due to a large number of components with different dimensions and materials. Understanding this structure is essential to design fuel cells against dynamic loads such as shock and
mohammad Mohammadi* +2 more
doaj +1 more source
Preventing wind turbine tower natural frequency excitation with a quasi-LPV model predictive control scheme [PDF]
Wind Energy, 2019 With the ever increasing size and costs of wind turbines, structural load minimization is crucial to extend the turbine lifetime, and to minimize operation and maintenance expenses.
S. Mulders +3 more
semanticscholar +1 more source
Investigation Into the Galloping Characteristics of Multispan Iced Covered Conductors
IEEE Access, 2022 A full multispan two-degree-of-freedom (2-DOF) iced covered transmission line model is presented. Taking multispan conductors as the research object, based on the Hamiltonian principle, a nonlinear galloping model of multispan conductors considering the ...
Jia-Yan Zheng +2 more
doaj +1 more source
Natural Frequencies of Human Corticothalamic Circuits [PDF]
Journal of Neuroscience, 2009 The frequency tuning of a system can be directly determined by perturbing it and by observing the rate of the ensuing oscillations, the so called natural frequency. This approach is used, for example, in physics, in geology, and also when one tunes a musical instrument. In the present study, we employ transcranial magnetic stimulation (TMS) to directly
M. Rosanova +5 more
openaire +2 more sources
Natural frequency analysis of cracked beam
Vietnam Journal of Mechanics, 1997 The model of cracked one-dimensional structure has been treated as two uniform beams connected by an equivalent rotation spring at the crack location.
Nguyen Tien Khiem, Dao Nhu Mai
doaj +1 more source
Buildings, 2021 Historic buildings have a high architectural value and their maintenance, repair and rehabilitation require a special approach. This approach is mainly based on the buildings’ performance under non-destructive tests such as operational modal analysis ...
Suzana Ereiz +3 more
doaj +1 more source