Results 31 to 40 of about 106,634 (300)

Damping Identification of Bridges Under Nonstationary Ambient Vibration

Engineering, 2017
This research focuses on identifying the damping ratio of bridges using nonstationary ambient vibration data. The damping ratios of bridges in service have generally been identified using operational modal analysis (OMA) based on a stationary white noise
Sunjoong Kim, Ho-Kyung Kim
doaj   +1 more source

First-Order Structural Modal Damping Ratio Identification by Withdrawing Amplitudes of Free Decaying Responses

Coatings
In the field of structural engineering, accurate identification of modal damping ratio is the key to structural dynamic response analysis. In order to accurately identify the modal damping ratio of the structure, this study proposes a method to identify ...
Shuai Luo, Youjie Nong, Gang Hou, Qiuwei Yang   +3 more
semanticscholar   +1 more source

Modal analysis and tension estimation of stay cables using noncontact vision‐based motion magnification method

Structural Control & Health Monitoring, 2022
This paper describes a study on modal analysis and tension estimation of stay cables by vision‐based measurement under ambient condition. Microvibration of stay cable is captured by video camera, and the amplitude is amplified using phase‐based video ...
S. Wangchuk, D. Siringoringo, Y. Fujino
semanticscholar   +1 more source

Modal identification of high earth-rock dams based on seismic records and SSI method

Yantu gongcheng xuebao, 2021
Using the measured seismic records to identify the modal parameters of high earth-rock dams is a feasible way to study the dynamic characteristics of dams.
WANG Mao-hua 1, 2, CHI Shi-chun 1, 2, ZHOU Xiong-xiong 3
doaj   +1 more source

Synergy of Interlaminar Glass Fiber Hybridization on Mechanical and Dynamic Characteristics of Jute and Flax Fabric Reinforced Epoxy Composites

Journal of Natural Fibers, 2022
Natural fiber composites (NFC) exhibit good specific mechanical properties in comparison to synthetic fiber composites (SFC). The study investigates interlaminar glass (G) fiber hybridized jute (J) and flax (F) reinforced epoxy composites designated as ...
Harshad Pingulkar, Ashok Mache, Yashwant Munde, I. Siva   +3 more
doaj   +1 more source

Influence of the modal damping ratio calculation method in the analysis of dynamic events obtained in structural health monitoring of bridges

Journal of Civil Structural Health Monitoring
This paper includes a review of the several calculation methods available to calculate the modal damping ratio from dynamic events obtained in structural health monitoring of bridges.
J. López-Aragón, V. Puchol, M. Astiz
semanticscholar   +1 more source

On the efficacy of friction damping in the presence of nonlinear modal interactions [PDF]

, 2016
This work addresses friction-induced modal interactions in jointed structures, and their effects on the passive mitigation of vibrations by means of friction damping.
M. Krack, L. Bergman, A. Vakakis
semanticscholar   +1 more source

TMD Damping for Structures with Uncertain Modal Parameters

Applied Sciences
The 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

Aeroelastic stability analysis of rotor blade with complex three-dimensional design

Xibei Gongye Daxue Xuebao, 2023
A rotor dynamic analysis method for the complex three-dimensional design blade was developed and applied to analyzing its aeroelastic stability. Based on the medium-size deformation beam theory and Hamilton principle, the joint transfer matrix was used ...
DENG Jinghui, YU Zhihao, ZHOU Yun, SONG Bin   +3 more
doaj   +1 more source

Enhanced frequency domain decomposition algorithm: a review of a recent development for unbiased damping ratio estimates

Journal of Vibroengineering, 2018
Enhanced frequency domain decomposition (EFDD) is one of OMA methods and has received significant interest from the engineering community involved in the identification of the modal structure.
M. Danial A. Hasan, Z. A. B. Ahmad, M. Salman Leong, L. M. Hee   +3 more
semanticscholar   +1 more source