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Experimental Investigation of Performance Characteristics of PZT-5A with Application to Fault Diagnosis

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Structural Durability & Health Monitoring 2022年第4期16卷 307-321页

作者： saqlain abbas Zulkarnain abbas Yanping Zhu Waqas Tariq Toor Xiaotong Tu Department of Mechanical Engineering University of Engineering and Technology LahoreNarowal CampusNarowal51600Pakistan Institute of Vibration Shock and NoiseState Key Laboratory of Mechanical System and VibrationShanghai Jiao Tong UniversityShanghai200240China Department of Mechanical Engineering National Fertilizer Cooperation(NFC)Institute of Engineering and TechnologyMultan61000Pakistan Institute of Refrigeration and Cryogenics Shanghai Jiao Tong UniversityShanghai200240China Department of Electrical Engineering University of Engineering and Technology LahoreNarowal CampusNarowal51600Pakistan The School of Informatics Xiamen UniversityXiamen361005China

In the previous couple of decades,techniques to reap energy and empower low voltage electronic devices have received outstanding *** of the methods based on the piezoelectric effect to harvest the energy from ambient vibrations have been ***’s an absence of experiment-based investigation which incorporates the microstructure analysis and crystal morphology of those energy harvest home ***,the impact of variable mechanical and thermal load conditions has seldom been studied within the previous literature to utilize the effectiveness of those materials in several practical applications like structural health monitoring(SHM),*** the proposed research work,scanning electron microscope(SEM)and energy dispersive x-ray(EDX)analysis are performed to examine the inside crystal morphology of PZT-5A and ensure the quality of the piezoelectric ***,the performance of piezoelectric vibration-based energy harvester has been investigated in the second phase of current research work under the variable mechanical and thermal load conditions through a regular series of ***’s been found that the output voltage of piezoelectric sensors will increase by increasing the applied load,whereas a decreasing trend in output voltage is noticed by increasing the applied temperature,resistance and *** the third part,a measuring setup is developed in the laboratory to further investigate the effectiveness of PZT-5A in practical applications such as electromechanical impedance(EMI)based structural health monitoring under the controlled heating ***,this analysis not only evaluates the performance of PZT sensors under the variable operating conditions but also encourages developing a temperature compensation approach in EMI-based SHM.

关键词： Piezoelectric energy harvester crystal morphology scanning electron microscope structural health monitoring electromechanical impedance

Experimental Study of Effect of Temperature Variations on the Impedance Signature of PZT Sensors for Fatigue Crack Detection

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Sound & Vibration 2021年第1期55卷 1-18页

作者： saqlain abbas Fucai Li Zulkarnain abbas Taufeeq Ur Rehman abbasi Xiaotong Tu Riffat Asim Pasha Institute of Vibration Shock and NoiseState Key Laboratory of Mechanical System and VibrationShanghai Jiaotong UniversityShanghai200240China Department of Mechanical Engineering University of Management and TechnologySialkot CampusSialkotPakistan Institute of Refrigeration and Cryogenics Shanghai Jiaotong UniversityShanghai200240China Department of Mechanical Engineering National Fertilizer Cooperation(NFC)Institute of Engineering and TechnologyMultanPakistan Department of Mechanical Engineering Mirpur University of Science and Technology(MUST)Mirpur10250Pakistan The School of Information Science and Engineering Xiamen UniversityXiamen361005China Mechanical Engineering Department UET TaxilaTaxilaPakistan

Structural health monitoring(SHM)is recognized as an efficient tool to interpret the reliability of a wide variety of *** identify the structural abnormality by utilizing the electromechanical coupling property of piezoelectric transducers,the electromechanical impedance(EMI)approach is ***,in real-time SHM applications,the monitored structure is exposed to several varying environmental and operating conditions(EOCs).The previous study has recognized the temperature variations as one of the serious EOCs that affect the optimal performance of the damage inspection *** this framework,an experimental setup is developed in current research to identify the presence of fatigue crack in stainless steel(304)beam using EMI approach and estimate the effect of temperature variations on the electrical impedance of the piezoelectric sensors.A regular series of experiments are executed in a controlled temperature environment(25°C–160°C)using 202 V1 Constant Temperature Drying Oven Chamber(Q/TBXR20-2005).It has been observed that the dielectric constantð"33 TÞwhich is recognized as the temperature-dependent constant of PZT sensor has sufficiently influenced the electrical impedance ***,the effective frequency shift(EFS)approach is optimized in term of significant temperature compensation for the current impedance signature of PZT sensor relative to the reference signature at the extended frequency bandwidth of the developed measurement system with better outcomes as compared to the previous literature ***,the current study also deals efficiently with the critical issue of the width of the frequency band for temperature compensation based on the frequency shift in *** results of the experimental study demonstrate that the proposed methodology is qualified for the damage inspection in real-time monitoring applications under the temperature *** is capable to exclude one of the major reasons of false fault d

关键词： Electromechanical impedance structural health monitoring piezoelectric sensors fatigue crack temperature compensation

A Study on Technological Dynamics in Structural Health Monitoring Using Intelligent Fault Diagnosis Techniques:A Patent-Based Approach

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Journal on Artificial Intelligence 2021年第3期3卷 97-113页

作者： saqlain abbas Zulkarnain abbas Xiaotong Tu Yanping Zhu Institute of Vibration Shock and NoiseState Key Laboratory of Mechanical System and VibrationShanghai Jiao Tong UniversityShanghai200240China Department of Mechanical Engineering University of Engineering and Technology LahoreNarowal CampusNarowal51600Pakistan Department of Mechanical Engineering National Fertilizer Cooperation(NFC)Institute of Engineering and TechnologyMultan61000Pakistan The School of Information Science and Engineering Xiamen UniversityXiamen361005China

The performance and reliability of structural components are greatly influenced by the presence of any abnormality in *** this purpose,structural health monitoring(SHM)is recognized as a necessary tool to ensure the safety precautions and efficiency of both mechanical and civil *** now,most of the previous work has emphasized the functioning of several SHM techniques and systematic changes in SHM ***,there exist insufficient data in the literature regarding the patent-based technological developments in the SHM research domain which might be a useful source of detailed information for worldwide research *** address this research gap,a method based on the Co-Operative Patent Classification(CPC)codes is proposed in the current *** proposed method includes the patent analysis of SHM in terms of its global publication trend and technology-based *** analysis is performed using patent database search tools,namely,IncoPat and *** period ranging from 2005 to 2019 is selected to retrieve the required patent documents.A new approach termed as Patents’value is utilized to investigate the technological impact of a patent in the form of forward citations,technical stability,and scope of *** identification of emerging SHM techniques and forecasting of vacant technology is also part of current research *** research results have revealed the increasing trend in the number of published patents each year related to various SHM *** this regard,China,the United States,and South Korea are notified as to the major depositor countries,***,mapping of patent data in this research is an effort to illustrate the effectiveness of the proposed method to demonstrate the development trends and dynamic inventions over the time in SHM research domain to achieve the optimal damage inspections of various mechanical components.

关键词： Structural health monitoring mechanical components patent analysis technological dynamics vacant technology forecast publication trend analysis

Study of Intelligent Approaches to Identify Impact of Environmental Temperature on Ultrasonic GWs Based SHM:A Review

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Journal on Artificial Intelligence 2023年第1期5卷 43-56页

作者： saqlain abbas Zulkarnain abbas Xiaotong Tu Yanping Zhu Department of Mechanical Engineering University of Engineering and Technology LahoreNarowal CampusNarowal51600Pakistan Institute of Vibration Shock and NoiseState Key Laboratory of Mechanical System and VibrationShanghai Jiao Tong UniversityShanghai200240China Department of Mechanical Engineering National Fertilizer Corporation(NFC)Institute of Engineering and TechnologyMultan61000Pakistan The School of Information Science and Engineering Xiamen UniversityXiamen361005China

Structural health monitoring(SHM)is considered an effective approach to analyze the efficient working of several mechanical *** this purpose,ultrasonic guided waves can cover long-distance and assess large infrastructures in just a single test using a small number of ***,the working of the SHM mechanism can be affected by some sources of variations(i.e.,environmental).To improve the final results of ultrasonic guided wave inspections,it is necessary to highlight and attenuate these environmental *** loading parameters,temperature and humidity have been recognized as the core environmental sources of variations that affect the SHM sensing *** temperature has the most significant influence on SHM *** is still a need for extensive research to develop such a damage inspection approach that should be insensitive to environmental temperature *** this framework,the current research study will not only illuminate the effect of environmental temperature through different intelligent approaches but also suggest the standard mechanism to attenuate it in actual ultrasonic guided wave based ***,the work presented in this article addresses one of the open research challenges that are the identification of the effect of environmental and operating conditions in practical applications of ultrasonic guided waves and impedance-based SHM.

关键词： Structural health monitoring ultrasonic guided waves environmental and operating conditions thermal sensitivity

Transport mechanism in chemically reactive hybrid nanofluid flow containing gyrotactic micro-organisms over a curved oscillatory surface

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Applied Mathematics and Mechanics(English Edition) 2025年第1期46卷 177-192页

作者： M.NAVEED M.IMRAN T.ASGHAR Z.abbas Department of Mathematics Division of Science and TechnologyUniversity of Education Department of Mathematics The Islamia University of Bahawalpur

This paper examines the transport analysis, including both heat transfer and mass transfer, in hybrid nanofluid flow containing gyrotactic microorganisms towards a curved oscillatory surface. The influence of magnetic fields is also inspected in terms of their physical characteristics. To depict the phenomena of transport, modified versions of both Fick's and Fourier's laws are used. Additionally, the characteristics of both heterogeneous and homogeneous chemical reactions are also incorporated. Utilizing a curvilinear coordinate system, the flow problem is formulated as partial differential equations(PDEs)for momentum, concentration, microorganism field, and energy. An analytical solution to the obtained flow equations is achieved utilizing the homotopy analysis method(HAM).The effects of significant flow parameters on the pressure and microorganism fields, velocity, oscillation velocity, concentration, and temperature distributions are shown via graphs. Furthermore, the variations in skin friction, mass transfer rate, heat transfer rate, and local motile number due to different involved parameters are presented in tables and are analyzed in detail. Graphical results indicate that the curves of velocity and temperature fields are enhanced as the values of the solid volume fraction variables *** is also verified that the concentration rate field decreases as the values of the homogeneous reaction strength parameter and the radius of curvature parameter increase, and it increases with the Schmidt number and the heterogeneous reaction strength *** outcomes show a favorable response of the motile number to advanced values of the Peclet number, the Schmidt number, the microorganism difference parameter, and the bio-convective Lewis number.

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Optimization and Sizing for Propulsion System of Liquid Rocket Using Genetic Algorithm

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Chinese Journal of Aeronautics 2007年第1期20卷 40-46页

作者： saqlain Akhtar School of Astronautics Beijing University of Aeronautics and Astronautics

Flight vehicle conceptual design appears to be a promising area for application of the Genetic Algorithm （GA） as an approach to help to automate part of the design process. This computational research effort strives to develop a propulsion system design strategy for liquid rocket to optimize take-off mass, satisfying the mission range under the constraint of axial overload. The method by which this process is accomplished by using GA as optimizer is outlined in this paper. Convergence of GA is improved by introducing initial population based on Design of Experiments Technique.

关键词： liquid rocket propulsion system genetic algorithm design of experiments

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Dissolution behavior of bioactive glass ceramics with different CaO/MgO ratios in SBF-K9 and r-SBF

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Progress in Natural Science:Materials International 2014年第4期24卷 354-363页

作者： M.U.Hashmi saqlain A.Shah Department of Applied Sciences Superior University Lahore 2. Department of PhysicsFC College (A Chartered University) Department of Material Science and Engineering Washington University

In the present work,we studied dissolution behavior of three glass ceramics samples each having 34 SiO2–14.5 P2O5–1 CaF2–0.5 MgF2(%wt)and ratio of CaO/MgO varying from 11.5:1 to 1:11.5 in conventional SBF(SBF-K9) and revised SBF(r-SBF) that has ionic concentration exactly equal to that of human blood *** that purpose,samples were immersed in fluids for different time periods upto 25 *** film XRD analysis revealed the diffusive nature of the phases on the surfaces of samples after soaking for different time periods in *** showed the poor precipitation and small thickness of the HCAp layer on the samples as compared to that in SBF-K9,thus indicating the fitness and sensitivity of r-SBF for in-vitro characterization of ***,FTIR and EDS revealed slow bonding rate on the surfaces of the samples in r-SBF than that in SBF-K9 that showed the dependence of bond formation on the composition of the materials as well as on the physiological fluid used for in-vitro *** rate of HCAp formation was slower in r-SBF due to more competitive adsorption of CO3 ions to Ca and Mg ions owing to greater amount of CO3 in r-SBF than that in *** shows the importance of CO3 content in the physiological fluids for the in-vitro assessment of ***,r-SBF is recommended to be used for assessment of samples to clearly understand their behavior in-vivo.

关键词： Dissolution behavior SBF-K9 r-SBF

Applying the spectral stochastic finite element method in multiple-random field RC structures

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Frontiers of Structural and Civil Engineering 2022年第4期16卷 434-447页

作者： abbas YAZDANI Civil Engineering Department University of Sistan and BaluchestanZahedan 98167-45845Iran

This paper uses the spectral stochastic finite element method(SSFEM)for analyzing reinforced concrete(RC)beam/slab *** doing so,it presents a new framework to study how the correlation length of a random field(RF)with uncertain parameters will affect modeling uncertainties and reliability *** considers:1)different correlation lengths for uncertainty parameters,and 2)dead and live loads as well as the elasticity moduli of concrete and steel as a multi-dimensional RF in concrete *** show the SSFEM’s efficiency in the study of concrete structures and to evaluate the sensitivity of the correlation length effects in evaluating the reliability,two examples of RC beams and slabs have been *** to the results,the RF correlation length is effective in modeling uncertainties and evaluating reliabilities;the longer the correlation length,the greater the dispersion range of the structure response and the higher the failure probability.

关键词： uncertainty spectral stochastic finite element method correlation length reliability assessment reinforced concrete beam/slab

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Multi-valued interval neutrosophic linguistic soft set theory and its application in knowledge management

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CAAI Transactions on Intelligence Technology 2020年第3期5卷 200-208页

作者： Nor Liyana Amalini Mohd Kamal Lazim Abdullah Ilyani Abdullah Muhammad saqlain Faculty of Ocean Engineering and Informatics Universiti Malaysia Terengganu21030 Kuala NerusTerengganuMalaysia Department of Mathematics Lahore Garrison UniversityDHA Phase VISector-CLahorePakistan

This study proposed the concepts of a multi-valued interval neutrosophic linguistic soft set(MVINLSS)by integrating the concepts of multi-valued interval neutrosophic soft set and linguistic *** is presented as it can deal with ambiguous and uncertain information in decision making which is characterised by linguistic *** proposed set amalgamates quantitative assessment with the qualitative assessment which can solve complex problems with ambiguity,uncertainty,and *** can be an effective tool to describe the real decision-makers’opinions and reflect their ***,the authors propose the basic operational rules of ***,they define a multi-valued interval neutrosophic linguistic soft weighted arithmetic averaging *** work proposed a multi-criteria decision-making(MCDM)method which considers different priority levels of criteria and the criteria values take the form of multi-valued interval neutrosophic linguistic soft ***,the proposed MCDM method is applied to the knowledge management case,considering 11 criteria.

关键词： valued qualitative integrating