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Initial stiffness and moment resistance of reinforced joint with end-plate connection

Sufang WANG, Yiyi CHEN,

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 4,   Pages 345-351 doi: 10.1007/s11709-009-0054-x

Abstract: The joint is divided into some basic components, and the initial stiffness of each component is obtainedEspecially, the initial stiffness of reinforced components is drawn by theoretical model and finite elementThe initial stiffness of reinforced joint can be obtained by assembling the initial stiffness of eachcomparison with the results of finite element calculation, it is verified that the method to calculate the initialstiffness of reinforced joint is accurate enough to be used to estimate the rigid behavior of the joint

Keywords： steel structure     end-plate connection     backing plate     supplementary web plate     initial stiffness     moment resistance    

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Mechanical design and analysis of a novel variable stiffness actuator with symmetrical pivot adjustment

Frontiers of Mechanical Engineering 2021, Volume 16, Issue 4,   Pages 711-725 doi: 10.1007/s11465-021-0647-1

Abstract: Thus, this paper aims to design a novel variable stiffness actuator (VSA) that can provide safer physicalVSA follows the idea of modular design, mainly including a variable stiffness module and a drive moduleThe variable stiffness module transmits the motion from the drive module in a roundabout manner, makingAs the key component of the variable stiffness module, a stiffness adjustment mechanism with a symmetricalExperiment results show that the VSA stiffness is close to the theoretical design stiffness.

Keywords： variable stiffness actuator     variable stiffness module     drive module     symmetrical structure     double-deck    

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Dynamical Experiment Research on New Seismic Isolation Bearings with SMA Wires

Deng Zongcai,Sun Hongjun,Liu Chunguo,Niu Kun,Deng Hongliang

Strategic Study of CAE 2005, Volume 7, Issue 12,   Pages 61-68

Abstract: The factors which affect the level stiffness, energy dissipation and equivalent damping ratio of SMA-rubber

Keywords： shape memory alloy     seismic isolation bearings     initial stiffness     hysteresis energy dissipation     equivalent    

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Comparison of indices for stiffness performance evaluation

Giuseppe CARBONE, Marco CECCARELLI,

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 3,   Pages 270-278 doi: 10.1007/s11465-010-0023-z

Abstract: This paper addresses the problem of a numerical evaluation of the stiffness performance for multibodyStiffness indices are computed and compared for a case study.Results are used for comparing the effectiveness of the stiffness indices.

Keywords： robotics     stiffness     performance indices    

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Effect of mulching with maize straw on water infiltration and soil loss at different initial soil moistures

Yifu ZHANG,Hongwen LI,Jin HE,Qingjie WANG,Ying CHEN,Wanzhi CHEN,Shaochun MA

Frontiers of Agricultural Science and Engineering 2016, Volume 3, Issue 2,   Pages 161-170 doi: 10.15302/J-FASE-2016104

Abstract: study investigated the effect of straw mulching on water infiltration and soil loss under different initialIncreasing initial SWC can decrease soil infiltration and increase soil loss.During an 80 mm rainfall event (80 mm·h for 60 min), 8%, 12% and 16% initial SWC treatments decreased42.5% and 58.1%, and increased total sediment yield by 44, 146 and 315 g, respectively, compared to 4% initialFor all initial SWC treatments, straw mulching of 30% or more significantly enhanced water infiltration

Keywords： infiltration     initial soil water content     rainfall simulation     soil loss     straw mulching    

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New nonlinear stiffness actuator with predefined torque‒deflection profile

Frontiers of Mechanical Engineering 2023, Volume 18, Issue 1, doi: 10.1007/s11465-022-0721-3

Abstract: A nonlinear stiffness actuator (NSA) could achieve high torque/force resolution in low stiffness rangeand high bandwidth in high stiffness range, both of which are beneficial for physical interaction between

Keywords： compliant actuator     nonlinear stiffness actuator     nonlinear spring     predefined torque−deflection profile    

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Mechanical design, modeling, and identification for a novel antagonistic variable stiffness dexterous

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 3, doi: 10.1007/s11465-022-0691-5

Abstract: It achieves finger stiffness adjustability according to the biologically inspired stiffness variationprinciple of discarding some mobilities to adjust stiffness.The mechanical design of the finger and its stiffness adjusting methods are elaborated.The stiffness characteristics of the finger joint and the actuation unit are analyzed.finger stiffness presets are provided to verify the validity of the model.

Keywords： multifingered hand     mechanism design     robot safety     variable stiffness actuator    

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Mechanical performance analysis and stiffness test of a new type of suspension bridge

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 5,   Pages 1160-1180 doi: 10.1007/s11709-021-0760-6

Abstract: A new type of suspension bridge is proposed based on the gravity stiffness principle.The rigid webs connect the main cable and main girder to form a truss that can improve the bending stiffnessbraces connect the main cables to form a closed space truss structure that can improve the torsional stiffnessA stiffness test was carried out on the new type of suspension bridge with a small span, and the results

Keywords： new type of suspension bridge     stiffness test     mechanical performance     railway bridge     space truss    

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Evacuation strategies for vertical ship lift during initial fire: Integrated application of stairs and

Shu CHEN, Menghan SHANG, Jianping WANG

Frontiers of Engineering Management 2021, Volume 8, Issue 1,   Pages 135-147 doi: 10.1007/s42524-020-0125-1

Abstract: The proposed model can provide a theoretical reference for evacuation research during initial fire events

Keywords： vertical ship lift     initial fire     fire evacuation     numerical simulation     stair     elevator    

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Investigating the influence of delamination on the stiffness of composite pipes under compressive transverse

Sattar MALEKI, Roham RAFIEE, Abolfazl HASANNIA, Mohammad Reza HABIBAGAHI

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 6,   Pages 1316-1323 doi: 10.1007/s11709-019-0555-1

Abstract: The effect of delamination on the stiffness reduction of composite pipes is studied in this research.The stiffness test of filament wound composite pipes is simulated using cohesive zone method.geometrical parameters including delamination size and its position with respect to loading direction on stiffnessAt first, finite element results for stiffness test of a perfect pipe without delamination are validateddirections and also its orientation with respect to loading direction on delamination propagation and stiffness

Keywords： delamination     composite pipes     stiffness test     cohesive zone method    

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A numerical framework for underground structures in layered ground under inclined P-SV waves using stiffness

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 1,   Pages 10-24 doi: 10.1007/s11709-022-0904-3

Abstract: The free-field responses are first obtained using the stiffness matrix method based on plane-wave assumptions

Keywords： underground structures     seismic response     stiffness matrix method     domain reduction method     P-SV waves    

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Gear fault diagnosis using gear meshing stiffness identified by gearbox housing vibration signals

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 4, doi: 10.1007/s11465-022-0713-3

Abstract: The gear meshing stiffness (GMS) identification approach is proposed by using housing vibration signalsdiscovered in the identified GMS spectra, and the results also validate the rationality of using meshing stiffness

Keywords： gearbox fault diagnosis     meshing stiffness     identification     transfer path     signal processing    

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Stiffness of a 3-degree of freedom translational parallel kinematic machine

S. SHANKAR GANESH,A.B. KOTESWARA RAO

Frontiers of Mechanical Engineering 2014, Volume 9, Issue 3,   Pages 233-241 doi: 10.1007/s11465-014-0312-z

Abstract: Stiffness modeling is done based on the compliance matrices of arm and forearm of each limb.Using the stiffness modeling the variations of minimum and maximum translational stiffness in the workspacevarious architectural parameters of the 3-DOF PKM the tendency of variations on the minimum and maximum stiffness

Keywords： 3-DOF translational PKM     inverse kinematics     stiffness modeling     translational stiffness    

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Design and experimental study of a passive power-source-free stiffness-self-adjustable mechanism

Yuwang LIU, Dongqi WANG, Shangkui YANG, Jinguo LIU, Guangbo HAO

Frontiers of Mechanical Engineering 2021, Volume 16, Issue 1,   Pages 32-45 doi: 10.1007/s11465-020-0604-4

Abstract: Passive variable stiffness joints have unique advantages over active variable stiffness joints and areWe propose a new passive power-source-free stiffness-self-adjustable mechanism that can be used as theself-adaptive adjustment of stiffness in a purely mechanical manner.The variable stiffness mechanism can automatically adjust joint stiffness in accordance with the magnitudeThe variable stiffness principle is explained, and the design of the variable stiffness mechanism is

Keywords： variable stiffness mechanism     stiffness self-regulation     bionic robot     modeling    

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Variable stiffness and damping magnetorheological isolator

Yang ZHOU, Xingyu WANG, Xianzhou ZHANG, Weihua LI

Frontiers of Mechanical Engineering 2009, Volume 4, Issue 3,   Pages 310-315 doi: 10.1007/s11465-009-0039-4

Abstract: paper presents the development and characterization of a magnetorheological (MR) fluid-based variable stiffnessExperimental results indicate that both the stiffness and damping capability of the developed MR isolator

Keywords： magnetorheological (MR) fluid     stiffness     damping     mathematical model     dynamic performance     parameter identification    

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Title Author Date Type Operation

Initial stiffness and moment resistance of reinforced joint with end-plate connection

Sufang WANG, Yiyi CHEN,

Journal Article

Mechanical design and analysis of a novel variable stiffness actuator with symmetrical pivot adjustment

Journal Article

Dynamical Experiment Research on New Seismic Isolation Bearings with SMA Wires

Deng Zongcai,Sun Hongjun,Liu Chunguo,Niu Kun,Deng Hongliang

Journal Article

Comparison of indices for stiffness performance evaluation

Giuseppe CARBONE, Marco CECCARELLI,

Journal Article

Effect of mulching with maize straw on water infiltration and soil loss at different initial soil moistures

Yifu ZHANG,Hongwen LI,Jin HE,Qingjie WANG,Ying CHEN,Wanzhi CHEN,Shaochun MA

Journal Article

New nonlinear stiffness actuator with predefined torque‒deflection profile

Journal Article

Mechanical design, modeling, and identification for a novel antagonistic variable stiffness dexterous

Journal Article

Mechanical performance analysis and stiffness test of a new type of suspension bridge

Journal Article

Evacuation strategies for vertical ship lift during initial fire: Integrated application of stairs and

Shu CHEN, Menghan SHANG, Jianping WANG

Journal Article

Investigating the influence of delamination on the stiffness of composite pipes under compressive transverse

Sattar MALEKI, Roham RAFIEE, Abolfazl HASANNIA, Mohammad Reza HABIBAGAHI

Journal Article

A numerical framework for underground structures in layered ground under inclined P-SV waves using stiffness

Journal Article

Gear fault diagnosis using gear meshing stiffness identified by gearbox housing vibration signals

Journal Article

Stiffness of a 3-degree of freedom translational parallel kinematic machine

S. SHANKAR GANESH,A.B. KOTESWARA RAO

Journal Article

Design and experimental study of a passive power-source-free stiffness-self-adjustable mechanism

Yuwang LIU, Dongqi WANG, Shangkui YANG, Jinguo LIU, Guangbo HAO

Journal Article

Variable stiffness and damping magnetorheological isolator

Yang ZHOU, Xingyu WANG, Xianzhou ZHANG, Weihua LI

Journal Article