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An analytical method for calculating torsional constants for arbitrary complicated thin-walled cross-sections

DU Baisong, GE Yaojun, ZHOU Zheng

Frontiers of Structural and Civil Engineering 2007, Volume 1, Issue 3,   Pages 293-297 doi: 10.1007/s11709-007-0038-7

Abstract: After changing the form of the equations and combining these two unknowns into one, torsional function, which is a function of shear flow, shear modulus, and twisting rate, is included in the governing equationsAll the torsional functions can be easily obtained from these homogeneous linear equations, and torsionalconstants can be easily obtained from the torsional functions.The advantage of this method is that we can easily and directly obtain torsional constants from the torsional

Keywords： homogeneous     complicated thin-walled     numerical example     advantage     torsional function    

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Mechanism of self-excited torsional vibration of locomotive driving system

Jianxin LIU, Huaiyun ZHAO, Wanming ZHAI

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 4,   Pages 465-469 doi: 10.1007/s11465-010-0115-9

Abstract: A single wheelset drive model and 2-DOFs torsional vibration model were established to investigate theself-excited torsional vibration of a locomotive driving system.The simulation results indicate that the self-excited torsional vibration occurs when the steady slip

Keywords： locomotive     driving system     self-excited torsional vibration     mechanism     influence factor    

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Flexural-torsional buckling behavior of aluminum alloy beams

Xiaonong GUO,Zhe XIONG,Zuyan SHEN

Frontiers of Structural and Civil Engineering 2015, Volume 9, Issue 2,   Pages 163-175 doi: 10.1007/s11709-014-0272-8

Abstract: This paper presents an investigation on the flexural-torsional buckling behavior of aluminum alloy beamsunder concentrated loads, the failure pattern, load-deformation curves, bearing capacity and flexural-torsionalIt is found that all the beam specimens collapsed in the flexural-torsional buckling with excessive deformationMoreover, the span, loading location and slenderness ratio influence the flexural-torsional bucklingSecondly, besides the experiments, a finite element method (FEM) analysis on the flexural-torsional buckling

Keywords： flexural-torsional buckling     aluminum alloy beams (AAB)     finite element method (FEM)     theoretical formula    

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A novel structural modification to eliminate the early coupling between bending and torsional mode shapes

Nazim Abdul NARIMAN

Frontiers of Structural and Civil Engineering 2017, Volume 11, Issue 2,   Pages 131-142 doi: 10.1007/s11709-016-0376-4

Abstract: structural modification approach has been adopted to eliminate the early coupling between the bending and torsionalBoth vertical and torsional displacements are calculated at the mid span of the deck to analyze boththe bending and the torsional stiffness of the system before and after the structural modification.Furthermore, the coupling between the vertical and torsional mode shapes has been removed to larger naturalThe novel structural approach manifested great efficiency in increasing vertical and torsional stiffness

Keywords： aeroelastic instability     structural damping     flutter wind speed     bending stiffness     torsional stiffness    

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Lateral-torsional buckling capacity assessment of web opening steel girders by artificial neural networks

Yasser SHARIFI,Sajjad TOHIDI

Frontiers of Structural and Civil Engineering 2014, Volume 8, Issue 2,   Pages 167-177 doi: 10.1007/s11709-014-0236-z

Abstract: A three-dimensional (3D) finite element (FE) model using ABAQUS for the elastic flexural torsional analysisnetwork (ANN) approach has been also employed to derive empirical formulae for predicting the lateral-torsional

Keywords： steel I-beams     lateral-torsional buckling     finite element (FE) method     artificial neural network (ANN) approach    

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Proposing two new methods to decrease lateral-torsional buckling in reduced beam section connections

Samira EBRAHIMI; Nasrin BAKHSHAYESH EGHBALI; Mohammad Mehdi AHMADI

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 12,   Pages 1581-1598 doi: 10.1007/s11709-022-0886-1

Abstract: Reduced web section (RWS) connections can prevent lateral-torsional buckling and web local buckling experiencedAccording to the results, RBS-ST and RW-RBS connections can decrease or even eliminate lateral-torsional

Keywords： RBS     RBS-ST     RW-RBS     lateral-torsional buckling     cyclic performance    

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Hole quality in longitudinal–torsional coupled ultrasonic vibration assisted drilling of carbon fiber

Guofeng MA, Renke KANG, Zhigang DONG, Sen YIN, Yan BAO, Dongming GUO

Frontiers of Mechanical Engineering 2020, Volume 15, Issue 4,   Pages 538-546 doi: 10.1007/s11465-020-0598-y

Abstract: The advanced longitudinal–torsional coupled ultrasonic vibration assisted drilling (LTC-UAD) method has

Keywords： longitudinal–torsional coupled     ultrasonically drilling     CFRP     thrust force     hole quality    

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Torsional vibrations of a cylindrical foundation embedded in a saturated poroelastic half-space

Dazhi WU,Lu YU

Frontiers of Structural and Civil Engineering 2015, Volume 9, Issue 2,   Pages 194-202 doi: 10.1007/s11709-015-0292-z

Abstract: Considering the interactions between an embedded foundation and saturated soil, the torsional vibrationsAccording to the dynamic equilibrium equations of a foundation under harmonic torque, the torsional vibrationsSelected examples are presented to investigate the influence of relevant parameters on the torsional

Keywords： embedded foundation     saturated soil     rigid foundation     elastic foundation     torsional vibration    

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Sensitivity analysis of torsional vibration behavior of the shafting of a turbo generator set to changes

XIE Danmei, ZHANG Hengliang, DONG Chuan, LIU Zhanhui, YANG Changzhu

Frontiers in Energy 2007, Volume 1, Issue 4,   Pages 483-486 doi: 10.1007/s11708-007-0072-4

Abstract: Aiming at a 300 MW turbo-generator model, the sensitivity of natural torsional frequencies and modesof torsional vibration (TV) to the rotational inertia and stiffness of the turbo-generator were analyzed

Keywords： Calculation     MW turbo-generator     sensitivity     stiffness    

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Control of wind-induced vibration of long-span bridges and tall buildings

GU Ming

Frontiers of Structural and Civil Engineering 2007, Volume 1, Issue 1,   Pages 51-62 doi: 10.1007/s11709-007-0005-3

Abstract: mass damper (TMD) with an adjustable frequency is proposed to control vertical bending buffeting and torsional

Keywords： torsional buffeting     large-scale     semiactive     adjustable frequency     building aeroelastic    

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Lung function and air pollution exposure in adults with asthma in Beijing: a 2-year longitudinal panel

Frontiers of Medicine 2022, Volume 16, Issue 4,   Pages 574-583 doi: 10.1007/s11684-021-0882-1

Abstract: The effect of air pollution on the lung function of adults with asthma remains unclear to date.The participants were divided into three groups according to their lung function level at every visitA linear mixed-effect model was applied to predict the change in lung function with each unit changeExposure to CO and PM2.5 was negatively associated with the large airway function of adultsPatients with asthma react differently to air pollutants as evidenced by their lung function levels.

Keywords： lung function     asthma     air pollution     adult    

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The function and regulation of OTU deubiquitinases

Jiansen Du, Lin Fu, Yingli Sui, Lingqiang Zhang

Frontiers of Medicine 2020, Volume 14, Issue 5,   Pages 542-563 doi: 10.1007/s11684-019-0734-4

Abstract: These OTUs show great variation in structure and function, which display a series of mechanistic featuresIn this review, we provide a comprehensive analysis of current progress in character, structure and functionFinally, we summarize the structure of viral OTUs and their function in immune escape and viral survival

Keywords： ubiquitin     OTU deubiquitinases     structure     function     regulation    

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Analogue Difference Balanced Function and Its Applications

Zhang Wenying,Li Shiqu

Strategic Study of CAE 2004, Volume 6, Issue 3,   Pages 45-52

Abstract:

This paper presents the concept of analogous difference of Boolean function, and call the Booleanfunction an analogue difference balanced function if whose analogous difference is balanced at any nonzeroof analogue bent functions, the paper proposes an efficient and sufficient condition for a logical function

Keywords： Bent function     perfect nonlinear function     2-radical expansion     analogue difference     analogue auto-correlationfunction     analogue difference balanced function    

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Quality Function Deployment Implementation in Construction: A Systematic Literature Review

Elizabeth A. Cudney,William L. Gillis

Frontiers of Engineering Management 2016, Volume 3, Issue 3,   Pages 224-230 doi: 10.15302/J-FEM-2016036

Abstract: Quality function deployment has been successfully used in product development to capture the voice ofQuality function deployment then carries these parameters into production and service to ensure the voiceThe house of quality, a tool within quality function deployment, can provide a means for comparison ofQuality function deployment can effectively link the project phases through design and construction andThe research method used is a systematic literature review from databases related to quality function

Keywords： construction     engineering management     quality function deployment     systematic review    

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Design and evaluation of a novel biopsy needle with hemostatic function

Frontiers of Mechanical Engineering 2023, Volume 18, Issue 2, doi: 10.1007/s11465-022-0738-7

Abstract: Biopsy is a method commonly used for early cancer diagnosis. However, bleeding complications of widely available biopsy are risky for patients. Safer biopsy will result in a more accurate cancer diagnosis and a decrease in the risk of complications. In this article, we propose a novel biopsy needle that can reduce bleeding during biopsy procedures and achieve stable hemostasis. The proposed biopsy needle features a compact structure and can be operated easily by left and right hands. A predictive model for puncture force and tip deflection based on coupled Eulerian–Lagrangian (CEL) method is developed. Experimental results show that the biopsy needle can smoothly deliver the gelatin sponge hemostatic plug into the tissue. Although the hemostatic plug bends, the overall delivery process is stable, and the hemostatic plug retains in the tissue without being affected by the withdrawal of the needle. Further experiments indicate that the specimens are well obtained and evenly distributed in the groove of the outer needle without scattering. Our proposed design of biopsy needle possesses strong ability of hemostasis, tissue cutting, and tissue retention. The CEL model accurately predicts the peak of puncture force and produces close estimation of the insertion force at the postpuncture stage and tip position.

Keywords： cancer diagnosis     biopsy needle     hemostatic function     predictive model     coupled Eulerian−Lagrangian    

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Title Author Date Type Operation

An analytical method for calculating torsional constants for arbitrary complicated thin-walled cross-sections

DU Baisong, GE Yaojun, ZHOU Zheng

Journal Article

Mechanism of self-excited torsional vibration of locomotive driving system

Jianxin LIU, Huaiyun ZHAO, Wanming ZHAI

Journal Article

Flexural-torsional buckling behavior of aluminum alloy beams

Xiaonong GUO,Zhe XIONG,Zuyan SHEN

Journal Article

A novel structural modification to eliminate the early coupling between bending and torsional mode shapes

Nazim Abdul NARIMAN

Journal Article

Lateral-torsional buckling capacity assessment of web opening steel girders by artificial neural networks

Yasser SHARIFI,Sajjad TOHIDI

Journal Article

Proposing two new methods to decrease lateral-torsional buckling in reduced beam section connections

Samira EBRAHIMI; Nasrin BAKHSHAYESH EGHBALI; Mohammad Mehdi AHMADI

Journal Article

Hole quality in longitudinal–torsional coupled ultrasonic vibration assisted drilling of carbon fiber

Guofeng MA, Renke KANG, Zhigang DONG, Sen YIN, Yan BAO, Dongming GUO

Journal Article

Torsional vibrations of a cylindrical foundation embedded in a saturated poroelastic half-space

Dazhi WU,Lu YU

Journal Article

Sensitivity analysis of torsional vibration behavior of the shafting of a turbo generator set to changes

XIE Danmei, ZHANG Hengliang, DONG Chuan, LIU Zhanhui, YANG Changzhu

Journal Article

Control of wind-induced vibration of long-span bridges and tall buildings

GU Ming

Journal Article

Lung function and air pollution exposure in adults with asthma in Beijing: a 2-year longitudinal panel

Journal Article

The function and regulation of OTU deubiquitinases

Jiansen Du, Lin Fu, Yingli Sui, Lingqiang Zhang

Journal Article

Analogue Difference Balanced Function and Its Applications

Zhang Wenying,Li Shiqu

Journal Article

Quality Function Deployment Implementation in Construction: A Systematic Literature Review

Elizabeth A. Cudney,William L. Gillis

Journal Article

Design and evaluation of a novel biopsy needle with hemostatic function

Journal Article