Results 11 to 20 of about 47,105 (164)

Modal Parameter Identification Based on Hilbert Vibration Decomposition in Vibration Stability of Bridge Structures

Advances in Civil Engineering, 2021
Modal parameters are important parameters for the dynamic response analysis of structures. An output-only modal parameter identification technique based on Hilbert Vibration Decomposition (HVD) is developed herein for structural modal parameter ...
Yingzhi Xia, Hui Li, Zhezhe Fan, Jiyong Xiao   +3 more
doaj   +1 more source

Modal parameters identification of bridge by improved stochastic subspace identification method with Grubbs criterion

Measurement + Control, 2021
In the wind tunnel test of a long-span bridge model, to ensure that the dynamic characteristics of the model can satisfy the test design requirements, it is particularly important to accurately identify the modal parameters of the model.
Yulin Zhou, Xulei Jiang, Mingjin Zhang, Jinxiang Zhang, Hao Sun, Xin Li   +5 more
doaj   +1 more source

A Specific Emitter Identification System Design for Crossing Signal Modes in the Air Traffic Control Radar Beacon System and Wireless Devices

Sensors, 2023
To improve communication stability, more wireless devices transmit multi-modal signals while operating. The term ‘modal’ refers to signal waveforms or signal types. This poses challenges to traditional specific emitter identification (SEI) systems, e.g.,
Miyi Zeng, Yue Yao, Hong Liu, Youzhang Hu, Hongyu Yang   +4 more
doaj   +1 more source

Detecting Damage Evolution of Masonry Structures through Computer-Vision-Based Monitoring Methods

Buildings, 2022
Detecting the onset of structural damage and its progressive evolution is crucial for the assessment and maintenance of the built environment. This paper describes the application of a computer-vision-based methodology for structural health monitoring to
Marialuigia Sangirardi, Vittorio Altomare, Stefano De Santis, Gianmarco de Felice   +3 more
doaj   +1 more source

Output-Only Time-Varying Modal Parameter Identification Method Based on the TARMAX Model for the Milling of a Thin-Walled Workpiece

Micromachines, 2022
The process parameters chosen for high-performance machining in the milling of a thin-walled workpiece are determined by a stability prediction model, which needs accurate modal parameters of the machining system. However, the in-process modal parameters
Junjin Ma, Xinhong Yan, Yunfei Li, Haoming Li, Yujie Li, Xiaoyan Pang   +5 more
doaj   +1 more source

Failure Identification of Dump Truck Suspension Based on an Average Correlation Stochastic Subspace Identification Algorithm

Applied Sciences, 2018
This paper proposes a fault identification method based on an improved stochastic subspace modal identification algorithm to achieve high-performance fault identification of dump truck suspension.
Bingwen Liu, Zhiyong Ji, Tie Wang, Zhenghao Tang, Guoxing Li   +4 more
doaj   +1 more source

Application of Improved Combined Deterministic-Stochastic Subspace Algorithm in Bridge Modal Parameter Identification

Shock and Vibration, 2021
Modal parameter identification is considered to be one of the most important tasks in structural health monitoring because it provides a reliable reference for structural vibration control, damage severity, and operational state.
Peng Wen, Inamullah Khan, Jie He, Qiaofeng Chen   +3 more
doaj   +1 more source

Modal Identification of Structures by Eliminating the Effect of the High Ocean Wind

Journal of Marine Science and Engineering, 2022
Tropical cyclone is a rapidly rotating storm system with severe excitation such as high wind. This severe excitation may change the performance of structures, such as bridges, wharves and wind turbine structures.
Chun-Xu Qu, Chang-Chong Liu, Xiao-Mei Yang, Hui-Juan Liu, Hong-Nan Li, Yu-Feng Zhang   +5 more
doaj   +1 more source

A Data-Driven System Identification Method for Random Eigenvalue Problem Using Synchrosqueezed Energy and Phase Portrait Analysis

Sensors, 2023
The primary purpose of this research is to evaluate the uncertainty associated with modal parameter estimation for an inverse dynamic problem in which the structural parameters are random. The random nature of the structure’s parameters will be reflected
Swarup Mahato, Arunasis Chakraborty, Paulius Griškevičius   +2 more
doaj   +1 more source

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
openaire   +4 more sources