Article
Engineering, Multidisciplinary
Andrzej Katunin
Summary: This paper introduces a novel approach for damage identification in structures based on the S-transform, which shows high sensitivity to structural damage and significantly reduces boundary effects compared to traditional methods.
Article
Mechanics
Venkatesan Moorthy, Karthikeyan Marappan
Summary: This study examined different damage identification techniques in detecting delamination in tapered composite plates and found that the CDF using the GSMS method performed the best overall. Adding more modes to the averaging process increased sensitivity and reduced uncertainty.
COMPOSITE STRUCTURES
(2023)
Article
Engineering, Marine
Mengying Li, Ziyan Wu, Haifeng Yang, He Huang
Summary: This study introduces a damage identification method based on the inverse finite element method, which utilizes limited strain sensor values to obtain strain field and complete modal data, enhancing the practicality of using strain data for damage identification. The effectiveness of the method is further demonstrated through numerical simulations on a cantilever plate under single and multi-damage conditions.
Article
Engineering, Ocean
Yin Zhang, Jun Guo, Yaoguo Xie, Jiang Xu
Summary: A novel method for hull girder damage identification based on mode curvature shapes (MCS) is proposed in this paper, and its effectiveness is validated through experiments. The results show that this method has good damage localization ability, but there is some error when quantifying tiny damage.
APPLIED OCEAN RESEARCH
(2022)
Article
Engineering, Civil
Arash Tavakoli Maleki, Hadi Parviz, Akbar A. Khatibi, Mahnaz Zakeri
Summary: This study investigated the mechanical properties of composite plates using a semi-analytical non-intrusive approach. The random fields were decomposed using the Karhunen-Loeve method, and the strains were defined based on first-order and higher-order shear-deformation theories. Stochastic equations of motion were derived using Euler-Lagrange equations, and the probabilistic response space was obtained using the non-intrusive polynomial chaos method. For the first time, the influence of spatially varying stochastic properties on the critical load, buckling mode shapes, and their sequences was studied, revealing significant effects on the reliability of thicker plates under compressive loading.
FRONTIERS OF STRUCTURAL AND CIVIL ENGINEERING
(2023)
Article
Engineering, Multidisciplinary
Khaldoon N. Brethee, Ahmed Y. Uwayed, Arz Y. Qwam Alden
Summary: In this study, vibration modal analysis was used to experimentally investigate the detection of fiber breakage (FB) and delamination in laminated composite plates. A new index named Improved Curvature Damage Factor (ICDF) was introduced to detect and localize damages in composite structures.
STRUCTURAL HEALTH MONITORING-AN INTERNATIONAL JOURNAL
(2023)
Article
Engineering, Multidisciplinary
Qiaoyu Ma, Mario Solis, Jose Daniel Rodriguez-Mariscal, Pedro Galvin
Summary: This paper presents a damage identification method for beam-type structures based on wavelet analysis, utilizing Damage Locating Index (DLI) and Damage Severity Index (DSI) to determine the location and severity of damage. The method is applicable with relatively few measurement points and can use reference values from static analysis for damage evaluation.
Article
Engineering, Mechanical
Amin Havaran, Mussa Mahmoudi, Reza Ebrahimpour
Summary: The article presents a data fusion method to improve the accuracy of extracting mode shapes of structures through image processing. Application of the novel technique at signal and feature levels significantly enhances the accuracy of the mode shapes. The method's accuracy has been verified by comparing seismic properties with results from accelerometer sensors and finite element method.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2021)
Article
Engineering, Multidisciplinary
X. Y. Li, S. J. Lin, S. S. Law, Y. Z. Lin, J. F. Lin
Summary: The article discusses the limitations of existing algorithms and damage indices for damage diagnosis, highlighting the potential benefits of combining different evaluation methodologies. By analyzing various test results, it is possible to enhance the final structural damage information effectively.
STRUCTURAL HEALTH MONITORING-AN INTERNATIONAL JOURNAL
(2021)
Article
Construction & Building Technology
Yingying He, Zhenghong Huang, Die Liu, Likai Zhang, Yi Liu
Summary: Structural health monitoring (SHM) is an important technology to ensure the safety of structures, and machine learning-based structural damage identification methods have gained attention for their ability to extract features effectively. However, the existing methods face challenges in feature parameter selection and computational time. This article proposes a hybrid deep learning framework that automatically extracts features from raw signals for structural damage identification, achieving significant performance advantages over classical methods.
Article
Engineering, Civil
Chien-Chou Chen, Wen-Hwa Wu, Yan-Ting Liu, Gwolong Lai
Summary: The tension estimation method based on effective vibration lengths requires at least one sensor near the high end of a stay cable or suspender of an arch bridge for good accuracy. By fitting partial mode shapes through local vibration measurements, accurate cable tension estimation can be achieved, demonstrating excellent accuracy in experiments.
ENGINEERING STRUCTURES
(2022)
Article
Mathematics, Applied
Jizeng Wang, Yonggu Feng, Cong Xu, Xiaojing Liu, Youhe Zhou
Summary: A high-accuracy multiresolution method is proposed for solving mechanics problems in complex or irregular domains. By designing a new wavelet basis function, a fifth-order numerical scheme is constructed for approximating multi-dimensional functions and their multiple integrals. The method converts the original equation with derivatives of various orders into a system of algebraic equations with discrete nodal values of the highest-order derivative using wavelet approximation of multiple integrals.
APPLIED MATHEMATICS AND MECHANICS-ENGLISH EDITION
(2023)
Article
Mechanics
Dong Zhang, Bin Yang, Jianping Tan, Yabin Jin, Biao Xiao, Guang Xian, Xiaolong Xue, Yan Li
Summary: This paper investigates a novel ERCM technique for damage localization and mode identification in CFRPs under normal impact load with energies of 50 and 80 J, successfully achieving accurate imaging of damage positions and prediction of damage modes based on the linear relationship between electrical resistance, incident energy, and panel thickness.
COMPOSITE STRUCTURES
(2021)
Article
Engineering, Mechanical
M. G. Masciotta, D. Pellegrini
Summary: This paper investigates the correlation between localized damage and global modal complexity indices in structural systems. A new index for damage localization and quantification is formulated and validated against real data through numerical and experimental analysis. The study shows how localized damage affects global modal complexity and proposes a new method for damage assessment.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2022)
Article
Environmental Sciences
Heng Zuo, Huiyong Guo
Summary: In this paper, a damage identification method based on the Kullback-Leibler (KL) distance of time domain model residuals is proposed to effectively determine the structural damage location. Experimental results demonstrate that the proposed method can accurately identify the damage location of multi-degree-of-freedom shear structures and complex stand structures, and it is robust enough to detect environmental noise and small damage.
Article
Engineering, Multidisciplinary
Yongfeng Xu
STRUCTURAL HEALTH MONITORING-AN INTERNATIONAL JOURNAL
(2020)
Article
Engineering, Multidisciplinary
Y. F. Xu
Article
Engineering, Mechanical
Yujia Hu, Weigong Guo, Weidong Zhu, Yongfeng Xu
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2019)
Article
Construction & Building Technology
Ying Wang, Kaoshan Dai, Yongfeng Xu, Weidong Zhu, Wensheng Lu, Yuanfeng Shi, Changzhou Mei, Songtao Xue, Karen Faulkner
JOURNAL OF PERFORMANCE OF CONSTRUCTED FACILITIES
(2020)
Article
Materials Science, Characterization & Testing
Wei Xu, Weidong Zhu, Yongfeng Xu, Maosen Cao
JOURNAL OF NONDESTRUCTIVE EVALUATION
(2020)
Article
Acoustics
Y. F. Xu, Da-Ming Chen, W. D. Zhu
JOURNAL OF SOUND AND VIBRATION
(2020)
Article
Chemistry, Analytical
Y. F. Xu, J. S. Kim
Summary: Curvatures in mode shapes and operating deflection shapes have been extensively studied for structural damage identification, showing the capability to localize and manifest local effects of damage. Propagating flexural waves are also effective for damage identification due to their high sensitivity and long range of propagation. The proposed method using curvature waveforms of propagating flexural waves does not require prior knowledge of pristine structures, and has high signal-to-noise ratios for manifesting local effects of damage.
Article
Engineering, Mechanical
Wei Zhou, Zhongren Feng, Y. F. Xu, Xiongjiang Wang, Hao Lv
Summary: A new signal decomposition method called empirical Fourier decomposition (EFD) is proposed to address the issues of mode mixing and inconsistency in existing methods. Numerical and experimental validations demonstrate that EFD can provide more accurate and consistent decomposition results for signals with multiple non-stationary modes and closely-spaced modes.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2022)
Article
Acoustics
Wei Zhou, Y. F. Xu, J. S. Kim
Summary: Waveforms of propagating flexural waves can reveal local anomalies caused by damage, and an effective noise-robust damage identification method for plate-like structures is proposed based on this fact. The method uses two-dimensional continuous wavelet transform to lower the adverse effects of measurement noise and errors and suppress the global trends of the waveforms. It also introduces a statistical criterion and an accumulative damage index to identify the location and extent of the damage.
JOURNAL OF SOUND AND VIBRATION
(2022)
Article
Engineering, Mechanical
Wei Zhou, Y. F. Xu
Summary: This study investigates the use of Proper Orthogonal Modes (POMs) of guided wavefields for damage identification in beam-like structures. The continuous wavelet transform is employed to enhance local anomalies and suppress global trends, and an adaptive truncation technique is used to determine significant POMs for damage identification. Numerical and experimental investigations verify the accuracy and noise-robustness of the proposed method for identifying the location and extent of damage in beam-like structures.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2023)
Article
Engineering, Mechanical
Y. F. Xu, G. L. Huang
Summary: This study provides an in-depth analysis of the impact of damage on the structural dynamic properties of finite acoustic metamaterials (AMMs). A modal sensitivity analysis is formulated to measure the modal deformation of each spring, and the effects of damage on AMMs are extensively investigated numerically. The results show significant changes in frequency response functions, eigenvalues, and mode shapes of damaged AMMs near bandgaps, with these changes diminishing as frequencies move away from the bandgaps. This research enhances our understanding of the structural dynamics of damaged metamaterials and offers valuable insights for the development of effective damage identification techniques and resilient metamaterial-based structures.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Proceedings Paper
Engineering, Civil
Daniel Kiracofe, Utkarsh Wani, Y. F. Xu
Summary: Locally resonant metamaterials have gained interest for their ability to attenuate shock and vibration, but it is important to understand their behavior in the presence of damage. Structural health monitoring and damage tolerance are crucial for detecting and mitigating damage in metamaterials.
DYNAMICS OF CIVIL STRUCTURES, VOL 2
(2023)
Proceedings Paper
Engineering, Mechanical
Da-Ming Chen, Y. F. Xu, W. D. Zhu
ROTATING MACHINERY, VIBRO-ACOUSTICS & LASER VIBROMETRY, VOL 7
(2019)
Article
Engineering, Civil
Yongfeng Xu, Da-Ming Chen, Weidong Zhu, Guoyi Li, Aditi Chattopadhyay
SMART STRUCTURES AND SYSTEMS
(2019)
Article
Acoustics
J. S. Kim, Y. F. Xu, W. D. Zhu
JOURNAL OF VIBRATION AND ACOUSTICS-TRANSACTIONS OF THE ASME
(2020)