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Finite element analysis and dynamic test of dynamic properties of the cable stayed bridge using CFRP cables

Cai Dongsheng ,Liu Ronggui,Xu Fei,Zhou Shijin

Strategic Study of CAE 2010, Volume 12, Issue 2,   Pages 16-21

Abstract: modeled and a structure dynamic property analysis was put up; lastly a dynamic property test under ambientexcitation was put up to analyze the dynamic characteristics of the first cable-stayed bridge using

Keywords： CFRP cable stayed bridge     dynamic property     finite element analysis     ambient excitation     dynamic test    

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Approximation of structural damping and input excitation force

Mohammad SALAVATI

Frontiers of Structural and Civil Engineering 2017, Volume 11, Issue 2,   Pages 244-254 doi: 10.1007/s11709-016-0371-9

Abstract: Structural dynamic characteristics are the most significant parameters that play a decisive role in structural damage assessment. The more sensitive parameter to the damage is the damping behavior of the structure. The complexity of structural damping mechanisms has made this parameter to be one of the ongoing research topics. Despite all the difficulties in the modeling of damping, there are some approaches like as linear and nonlinear models which are described as the energy dissipation throughout viscous, material or structural hysteretic and frictional damping mechanisms. In the presence of a mathematical model of the damping mechanisms, it is possible to estimate the damping ratio from the theoretical comparison of the damped and un-damped systems. On the other hand, solving the inverse problem of the input force estimation and its distribution to each SDOFs, from the measured structural responses plays an important role in structural identification process. In this paper model-based damping approximation method and a model-less structural input estimation are considered. The effectiveness of proposed methods has been carried out through analytical and numerical simulation of the lumped mass system and the results are compared with reference data. Consequently, high convergence of the comparison results illustrates the satisfactory of proposed approximation methods.

Keywords： structural modal parameters     damping identification method     input excitation force identification     Inverse    

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Prediction of the theoretical and semi-empirical model of ambient temperature

Foued CHABANE,Noureddine MOUMMI,Abdelhafid BRIMA,Abdelhafid MOUMMI

Frontiers in Energy 2016, Volume 10, Issue 3,   Pages 268-276 doi: 10.1007/s11708-016-0413-y

Abstract: It is well known that the ambient temperature is a sensitive parameter which has a great effect on biologyAs a result, temperature profiles can be developed which accurately represent the expected ambient temperatureThe ambient temperature over time is modeled based on the previous and data and using a LagrangeTo observe the comprehensive variation of ambient temperature the profile must be determined numericallyThe model proposed in this paper can provide an acceptable way to measure the change in ambient temperature

Keywords： ambient temperature     environment     correlation     theoretical model     semi-empirical    

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Human health ambient water quality criteria for 13 heavy metals and health risk assessment in Taihu Lake

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 4, doi: 10.1007/s11783-021-1475-6

Abstract:

• The concentrations of 13 heavy metals in Taihu Lake were analyzed.

Keywords： Heavy metals     Human health ambient water quality criteria     Taihu Lake     Health risk assessment     Contribution    

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Chemisorption solid materials for hydrogen storage near ambient temperature: a review

Yiheng ZHANG, Shaofei WU, Liwei WANG, Xuefeng ZHANG

Frontiers in Energy 2023, Volume 17, Issue 1,   Pages 72-101 doi: 10.1007/s11708-022-0835-7

Abstract: technologies for hydrogen storage, especially high-efficiency hydrogen storage of fuel cells in near ambientHowever, there are several challenges to be solved at near ambient temperature, i.e., unclear hydrogenreview, the characteristics and modification methods of chemisorption hydrogen storage materials at near ambient

Keywords： hydrogen storage capacity     chemisorption     near-ambient-temperature     modification methods     alloy hydrides    

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Simulation Research on PWM Control in Excitation System of Generator

Jia Guixi,Xu Wei,Guo Baoyue,Zhang Chentang

Strategic Study of CAE 2005, Volume 7, Issue 6,   Pages 50-53

Abstract:

A high quality excitation system not only plays an important role in the stability of power systemIn this paper, a PWM rectifier is applied to excitation system of synchronous generators.;s supply by achieving low harmonic current conversion and improving high power factor transform of excitation

Keywords： PWM     high power factor     excitation system     Matlab simulation    

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Hygroscopicity of ambient submicron particles in urban Hangzhou, China

Jiachen ZHANG, Lin WANG, Jianmin CHEN, Shengmao FENG, Jiandong SHEN, Li JIAO

Frontiers of Environmental Science & Engineering 2011, Volume 5, Issue 3,   Pages 342-347 doi: 10.1007/s11783-011-0358-7

Abstract: In this study, hygroscopicity of size-segregated ambient submicron particles in urban Hangzhou was studiedparticles in urban Hangzhou were almost entirely externally mixed, and the hygroscopic properties of ambient

Keywords： hygroscopicity     hygroscopic tandem differential mobility analyzer (H-TDMA)     submicron ambient particles    

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Effect of ambient polycyclic aromatic hydrocarbons and nicotine on the structure of Aβ protein

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 2, doi: 10.1007/s11783-023-1615-2

Abstract:

● B[a]P, nicotine and phenanthrene molecules altered the secondary structure of Aβ42.

Keywords： Polycyclic aromatic hydrocarbons     Nicotine     toxicology     Aβ42 peptide     Alzheimer’s disease     Molecular dynamics simulations     Environmental pollution    

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Effect of sodium bicarbonate solution on methyltrimethoxysilane-derived silica aerogels dried at ambient

Yujing Liu, Xiao Han, Balati Kuerbanjiang, Vlado K. Lazarov, Lidija Šiller

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 4,   Pages 954-959 doi: 10.1007/s11705-020-2028-4

Abstract: Here we present an economical ambient pressure drying method of preparing monolithic silica aerogels

Keywords： silica aerogel     methyltrimethoxysilane     solvent exchange     sodium bicarbonate     trimethylchlorosilane     ambient    

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Ambient Noise Tomography for Coral Islands Article

Shaohong Xia, Changrong Zhang, Jinghe Cao

Engineering 2023, Volume 25, Issue 6,   Pages 182-193 doi: 10.1016/j.eng.2021.09.022

Abstract: While ambient noise tomography with dense arrays has been widely used in continental regions, its applicabilitydata recorded by a dense array on an isolated coral island in the South China Sea, we analyzed the ambientnoise characteristics and obtained a 3D subsurface structure of the coral island using ambient noiseWe made the following findings: ① The ambient noise frequencies can be roughly categorized into threeHowever, it was difficult to extract meaningful cross-correlation functions for ambient noise frequencies

Keywords： Coral island     Ambient noise tomography     Engineering geology     South China Sea    

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Hybrid energy harvesting systems for self-powered sustainable water purification by harnessing ambient

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 10, doi: 10.1007/s11783-023-1718-9

Abstract:

● Energy harvesters harness multiple energies for self-powered water purification.

Keywords： Piezocatalysis     Solar energy     Waste heat     Decentralized water treatment     Point-of-use     Nanogenerator    

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Experimental study of modal parameter identification in a simulated ambient-excited structure

JI Xiaodong, QIAN Jiaru, XU Longhe

Frontiers of Structural and Civil Engineering 2007, Volume 1, Issue 3,   Pages 281-285 doi: 10.1007/s11709-007-0036-9

Abstract: The natural excitation technique and the eigensystem realization algorithm were combined to identifythe modal parameters in the time domain of a structure excited by simulated ambient vibrations.experimental modal analysis was performed on a two-story steel braced frame model excited by simulated ambient

Keywords： eigensystem realization     eigen-sensitivity analysis     realization algorithm     vibration     effective    

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Evaluating the short-term effect of ambient temperature on non-fatal outdoor falls and road traffic injuries

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 9, doi: 10.1007/s11783-023-1705-1

Abstract:

● A study assessing the temperature-injury relationship was conducted among students.

Keywords： Ambient temperature     Fall     Road traffic injury     Student     China    

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A subband excitation substitute based scheme for narrowband speech watermarking Article

Wei LIU, Ai-qun HU

Frontiers of Information Technology & Electronic Engineering 2017, Volume 18, Issue 5,   Pages 627-643 doi: 10.1631/FITEE.1601503

Abstract: imposed on a passband watermark signal by forcing its power level to be the same as the original passband excitation

Keywords： Analysis filter     Linear prediction     Narrowband speech watermarking     Passband excitation replacement    

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iterative data enhancement for implementation in purification of modal frequency for extremely noisy ambient

Hassan YOUSEFI, Alireza TAGHAVI KANI, Iradj MAHMOUDZADEH KANI, Soheil MOHAMMADI

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 2,   Pages 446-472 doi: 10.1007/s11709-019-0605-8

Abstract: data by a wavelet-based iterative filtering algorithm for identification of natural frequencies during ambientHence, different thresholds can be obtained for different recorded signals in one ambient test.

Keywords： ambient vibration test     high level noise     iterative signal enhancement     wavelet     cross and autocorrelation    

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Title Author Date Type Operation

Finite element analysis and dynamic test of dynamic properties of the cable stayed bridge using CFRP cables

Cai Dongsheng ,Liu Ronggui,Xu Fei,Zhou Shijin

Journal Article

Approximation of structural damping and input excitation force

Mohammad SALAVATI

Journal Article

Prediction of the theoretical and semi-empirical model of ambient temperature

Foued CHABANE,Noureddine MOUMMI,Abdelhafid BRIMA,Abdelhafid MOUMMI

Journal Article

Human health ambient water quality criteria for 13 heavy metals and health risk assessment in Taihu Lake

Journal Article

Chemisorption solid materials for hydrogen storage near ambient temperature: a review

Yiheng ZHANG, Shaofei WU, Liwei WANG, Xuefeng ZHANG

Journal Article

Simulation Research on PWM Control in Excitation System of Generator

Jia Guixi,Xu Wei,Guo Baoyue,Zhang Chentang

Journal Article

Hygroscopicity of ambient submicron particles in urban Hangzhou, China

Jiachen ZHANG, Lin WANG, Jianmin CHEN, Shengmao FENG, Jiandong SHEN, Li JIAO

Journal Article

Effect of ambient polycyclic aromatic hydrocarbons and nicotine on the structure of Aβ protein

Journal Article

Effect of sodium bicarbonate solution on methyltrimethoxysilane-derived silica aerogels dried at ambient

Yujing Liu, Xiao Han, Balati Kuerbanjiang, Vlado K. Lazarov, Lidija Šiller

Journal Article

Ambient Noise Tomography for Coral Islands

Shaohong Xia, Changrong Zhang, Jinghe Cao

Journal Article

Hybrid energy harvesting systems for self-powered sustainable water purification by harnessing ambient

Journal Article

Experimental study of modal parameter identification in a simulated ambient-excited structure

JI Xiaodong, QIAN Jiaru, XU Longhe

Journal Article

Evaluating the short-term effect of ambient temperature on non-fatal outdoor falls and road traffic injuries

Journal Article

A subband excitation substitute based scheme for narrowband speech watermarking

Wei LIU, Ai-qun HU

Journal Article

iterative data enhancement for implementation in purification of modal frequency for extremely noisy ambient

Hassan YOUSEFI, Alireza TAGHAVI KANI, Iradj MAHMOUDZADEH KANI, Soheil MOHAMMADI

Journal Article