Results 51 to 60 of about 581 (218)

Elliptical Method for Damage Identification in Carbon Fibre Reinforced Polymer Laminates

Advances in Materials Science and Engineering, 2019
Oftentimes, researchers in the area of vibration-based structural health monitoring (SHM) and damage detection focused their attention on the global properties of structures, which are modal frequencies and modal damping factors.
Daerefa-a Mitsheal Amafabia, Diogo Montalvão, Opukuro David-West, George Haritos   +3 more
doaj   +1 more source

The Amplification Obtainable by the Heterodyne Method of Reception [PDF]

Proceedings of the IRE, 1918
The author contrasts the Cohen theory that heterodyne amplification can be increased indefinitely by increasing the local current (using an ideal detector of unlimited current-carrying capacity) with the Liebowitz theory that the maximum "true heterodyne amplification" is four.
openaire   +2 more sources

Bridge Flutter Prediction and Active Control Using Modal Information and Flutter Margins

Structural Control and Health Monitoring, Volume 2025, Issue 1, 2025.
In this paper, a flutter prediction method based on flutter margins is proposed for streamlined bridges whose aeroelastic behavior can be well approximated by a two‐degree‐of‐freedom (2‐DoF) flutter model. The method enables prediction of the flutter boundary by extrapolating a curve of flutter margin versus wind speed, constructed using flutter ...
Xiaojun Wei, Ran Xia, Hao Wu, Xinran Guo, Zihan Tan, Yingying Wei, Xuhui He, Jun Li   +7 more
wiley   +1 more source

Automated Transmissibility‐Based Damage Detection for Output‐Only Systems

Structural Control and Health Monitoring, Volume 2025, Issue 1, 2025.
In this study, an automated transmissibility‐based procedure for damage detection is developed for output‐only systems. The application of transmissibility has been previously investigated for damage detection. Despite the advancements, current techniques are not applicable in a general way, as vast experience or expert knowledge is needed to achieve ...
David Bonilla, Clemens Jonscher, Marlene Wolniak, Tanja Grießmann, Raimund Rolfes, Bareille Olivier   +5 more
wiley   +1 more source

Receptance Methods and the Dynamics of Disordered One-Dimensional Lattices

, 1984
The method of receptance analysis is used to set up a frequency equation for the free vibration modes of a one-dimensional periodic lattice (mass-spring system) containing a disorder which is itself a one-dimensional periodic lattice. The concepts of the
Mead, D. J., Lee, S. M.
core   +1 more source

Receptance-based frequency assignment for assembled structures

, 2021
For engineering structures, there is a strong need to assign natural frequencies to achieve desired dynamic performance. This study proposes a receptance-based frequency assignment method for assembled structures.
Ouyang, H, Zhang, S
core   +1 more source

Modal finite element correlation for computer aided engineering education

Engineering Reports, Volume 6, Issue 8, August 2024.
The implementation of real solutions during courses. Experimental and numerical validation. Abstract The main challenge faced by many mechanical engineering educators is the implementation of real solutions during their courses. One alternative can be a realistic case study, where the students can be engaged in the development and analysis process ...
Moises Jimenez‐Martinez, Sergio Guillermo Torres‐Cedillo, Jacinto Cortés‐Pérez, Alberto Reyes‐Solís   +3 more
wiley   +1 more source

Characterizing Spindle–Tool Holder Interfaces for Tool-Point FRF Prediction Using RCSA and Finite Element Modeling

Machines
The tool-point frequency response function (FRF) of a spindle–tool system plays a crucial role in predicting machining stability. Among the factors influencing the FRF, the interface characteristics between the spindle and the tool holder are ...
Jui-Pin Hung, Yung-Chih Lin, Wei-Zhu Lin, Xiao-Jian Xuan, Yu-Sheng Lai   +4 more
doaj   +1 more source

Time‐attentive fusion network: An efficient model for online detection of action start

IET Image Processing, Volume 18, Issue 7, Page 1892-1902, 29 May 2024.
Here, a novel Time‐Attentive Fusion Network (TAF‐Net) is introduced to address the requirements of improved action detection accuracy and operational efficiency in the task of online detection of action start. The proposed model not only learns valuable sequence information for precise detection but its linear computational complexity and parallelism ...
Xuejiao Hu, Shijie Wang, Ming Li, Yang Li, Sidan Du   +4 more
wiley   +1 more source

Estimation of Joint Parameters Using Frequency‐Based Substructuring Techniques

International Journal of Distributed Sensor Networks, Volume 2024, Issue 1, 2024.
This study presents frequency‐based substructuring (FBS) techniques and an identification method for predicting joint parameters. Two FBS techniques, FBS‐1 and FBS‐2, were derived by assuming pseudomasses at the joint nodes between adjacent substructures.
Hye-Sook Jang, Jae-Hyoung An, Hee-Chang Eun, Yuedong Xie   +3 more
wiley   +1 more source