Damage identification

Artificial neural network (ANN), a powerful technique, has been used widely over the last decades in many scientific fields including engineering problems. However, the backpropagation algorithm in ANN is based on a gradient descent approach.

15p vibecca 01-10-2024 2 1   Download

Recently, Structural Health Monitoring (SHM) has become a critical component of the maintenance and safety of lifeline infrastructures such as dams, skyscrapers, and bridges, thanks to its ability to detect structural failures at the early stages. In this paper, we evaluate the performance of the SHM damage identification tool using a novel metaheuristic algorithm called the Artificial Hummingbird Algorithm (AHA).

15p vibecca 01-10-2024 1 1   Download

In this current study, the structural failure determination is carried out through a damage index based solely on the unhealthy state. A combination of the gapped smooth and modal curvature methods is the core of calculating the proposed indicator.

15p vibecca 01-10-2024 5 2   Download

A damage diagnosis method for trusses based on incomplete free vibration properties utilizing ensemble learning, e.g. Extreme gradient boosting (XGBoost), is presented in this work. Owing to the lack of measurement sensors, modal features are only measured at master degrees of freedom (DOFs) of a few first models instead of all DOFs of a structural system.

12p vifaye 20-09-2024 1 1   Download

This article presents an improved procedure for detecting single damage in beam-like structures. Many damage detection methods are based on the analysis of beam natural frequency shifts in damaged and intact states and its analytical modal curvatures.

15p vifaye 20-09-2024 4 1   Download

This paper presents a method for establishing the exact receptance function of a tapered axially functionally graded (AFG) beam with nonlinear ratios of properties using the Adomian method. In current papers, the Adomian method was applied for linearly tapered beams where the geometric series was used conveniently.

22p dianmotminh02 03-05-2024 5 2   Download

The numerical wedge splitting tests show that in the case of brittle materials, the lower post-failure stress limit defined in the concrete damaged plasticity model resulted in energy consumption for crack propagation exceeding the defined fracture energy (114% higher in the case of a brittleness number of 4.4).

9p guernsey 28-12-2021 12 0   Download

Bài viết này giới thiệu giải pháp kiểm định và quan trắc công trình cầu bê tông cốt thép bằng phương pháp IADP (Identification of Active Damage Processes - Xác định các quá trình phá hoại chủ động) dựa trên phân tích các tín hiệu sóng âm thanh (Acoustic Emission – AE) được tạo bởi chính quá trình phá hoại dưới tác động của tải trọng khai thác. Mời các bạn cùng tham khảo!

8p novemberer 10-07-2021 38 2   Download

To establish a forest pest and disease database reference collections. Two. To provide training in forest health monitoring, damage assessment, pest risk analysis, collection, preservation, identification and Curation. 3. To establish and equip a network of experimental observations FSIV center based on additional regional centers Department of Crop Protection.

0p xau_la 09-02-2012 61 9   Download

Other Organ Systems and the Future The use of stem cells in regenerative medicine has been studied for many other organ systems and cell types, including skin, eye, cartilage, bone, kidney, lung, endometrium, vascular endothelium, smooth muscle, striated muscle, and others. In fact, the potential for stem cell regeneration of damaged organs and tissues is virtually limitless. However, numerous obstacles must be overcome before stem cell therapies can become a widespread clinical reality.

5p konheokonmummim 03-12-2010 116 9   Download