Results 21 to 30 of about 288,967 (302)
Modal identification of damaged frames
Structural Control and Health Monitoring, 2015 Summary The paper investigates the possibility of identifying localised damages for multi-span and multi-floor linear elastic frames using only natural frequencies measured in the undamaged and damaged configurations. Namely, frames of increasing complexity are studied by exploring one by one their significant substructures (i.e.
Diaferio, Mariella, SEPE, VINCENZO
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Identification of Mode Shapes Based on Ambient Signals and the IA-VMD Method
Applied Sciences, 2021 The paper presents a multiaspect analysis of multivalues and the broadband nature of system oscillation. By analyzing the ambient signal caused by random small disturbances during the normal operation of interconnected power grids, many system operation ...
Fang Liu +5 more
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Modal Analysis Using Operating Modal Identification Method
Chinese Journal of Aeronautics, 2004 AbstractSometimes it is very difficult for some large scale operating structures to measure the input forces. Modal parameters must be estimated on response only. A poly-reference time domain operating modal identification complex exponential method is presented since cross-correlation functions have the same form as impulse response functions.
ZHENG, Min +3 more
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Comparison of Different Independent Component Analysis Algorithms for Output-Only Modal Analysis
Shock and Vibration, 2016 From the principle of independent component analysis (ICA) and the uncertainty of amplitude, order, and number of source signals, this paper expounds the root reasons for modal energy uncertainty, identified order uncertainty, and modal missing in output-
Jianying Wang +3 more
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Bi Modal Person Identification System [PDF]
International Journal of Machine Learning and Computing, 2013 Face recognition is one of the most important applications of computer vision in recent years. The developed multimodal biometric system possesses a number of unique qualities, starting from utilizing principal component analysis and Fisher's linear Discriminant methods for individual matcher's identity authentication and utilizes the novel feature ...
C. N. Dinakardas +2 more
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Shock and Vibration, 2020 The measured frequency response functions (FRFs) in the modal test are usually contaminated with noise that significantly affects the modal parameter identification.
Tianxu Zhu, Chaoping Zang, Gengbei Zhang
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Modal Identification of Train Passenger Seats Based on Dynamic Tests and Output-Only Techniques
Applied Sciences, 2023 Railways are one of the most efficient and widely used mass transportation systems for mid-range distances, also being pointed out as the best strategy to reach European Union decarbonisation goals.
Patricia Silva +3 more
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Online Modal Identification of Concrete Dams Using the Subspace Tracking-Based Method
Shock and Vibration, 2019 To investigate the time-varying dynamic characteristics of concrete dams under the excitation of large earthquakes for online structural health monitoring and damage evaluation, an online modal identification procedure based on strong-motion records is ...
Lin Cheng +3 more
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Perturbation damage indicators based on complex modes [PDF]
, 2017 The papers focusing on dynamic identification of structural damages usually rely on the comparison of two or more responses of the structure; the measure of damage is related to the differences of the vibration signals.
Lofrano, Egidio +3 more
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Characterizing the Dynamic Response of a Chassis Frame in a Heavy-Duty Dump Vehicle based on an Improved Stochastic System Identification [PDF]
, 2015 This paper presents an online method for the assessment of the dynamic performance of the chassis frame in a heavy-duty dump truck based on a novel stochastic subspace identification (SSI) method. It introduces the use of an average correlation signal as
Chen, Zhi +3 more
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