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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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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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Stiffness analysis and experimental validation of robotic systems

Giuseppe CARBONE

Frontiers of Mechanical Engineering 2011, Volume 6, Issue 2,   Pages 182-196 doi: 10.1007/s11465-011-0221-3

Abstract:

Stiffness can be considered of primary importance in order to guarantee the successful use of anyThe proposed numerical procedure is based on models with lumped parameters for deriving the Cartesian stiffnessStiffness performance indices are also proposed for comparing stiffness performance.Then, an experimental procedure for the evaluation stiffness performance is proposed as based on a newanalysis and experimental validation of stiffness performance.

Keywords： robotics     stiffness performance     numerical and experimental estimations    

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Meshing stiffness property and meshing status simulation of harmonic drive under transmission loading

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 2, doi: 10.1007/s11465-022-0674-6

Abstract: The meshing forces and torsional stiffness of the HD are nonlinear with the torsional angle.

Keywords： harmonic drive     meshing flexibility matrix     meshing force     loading backlash     flexspline     contact analysis    

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A dynamic stiffness-based framework for harmonic input estimation and response reconstruction considering

Yixian LI; Limin SUN; Wang ZHU; Wei ZHANG

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 4,   Pages 448-460 doi: 10.1007/s11709-022-0805-5

Abstract: This paper proposes a framework based on the dynamic stiffness theory, to estimate harmonic input, reconstructThe principal component analysis has been adopted to “compress” the under-determined equation, and formed

Keywords： dynamic stiffness     principal component analysis     response reconstruction     damage localization     under-determined    

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Discontinuous mechanical behaviors of existing shield tunnel with stiffness reduction at longitudinal

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 1,   Pages 37-52 doi: 10.1007/s11709-022-0920-3

Abstract: The effects of the stiffness reduction at the longitudinal joints (α and β), the shearingstiffness of the Timoshenko beam GA, and different additional pressure profiles on the responses

Keywords： tunnel–soil interaction     discontinuous analysis     longitudinal joints     existing shield tunnel     Timoshenko    

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Mesh relationship modeling and dynamic characteristic analysis of external spur gears with gear wear

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 1,   Pages 9-9 doi: 10.1007/s11465-021-0665-z

Abstract: A new mesh relationship caused by gear wear affects meshing excitations, such as mesh stiffness and transmissionrelationship with gear wear is proposed, which is utilized to evaluate the influence of gear wear on mesh stiffnessBased on the mesh stiffness and USTE considering gear wear, a gear dynamic model is established, and

Keywords： gear wear     mesh relationship     mesh stiffness     transmission error     vibration characteristics    

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Nonlinear analysis of cable structures using the dynamic relaxation method

Mohammad REZAIEE-PAJAND, Mohammad MOHAMMADI-KHATAMI

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 1,   Pages 253-274 doi: 10.1007/s11709-020-0639-y

Abstract: The analysis of cable structures is one of the most challenging problems for civil and mechanical engineersTo utilize this scheme, investigators have suggested various stiffness matrices for a cable element.achieve this goal, 16 numerical examples and two criteria, namely, the number of iterations and the analysis

Keywords： nonlinear analysis     cable structure     stiffness matrix     dynamic relaxation method    

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Advanced finite element analysis of a complex deep excavation case history in Shanghai

Yuepeng DONG, Harvey BURD, Guy HOULSBY, Yongmao HOU

Frontiers of Structural and Civil Engineering 2014, Volume 8, Issue 1,   Pages 93-100 doi: 10.1007/s11709-014-0232-3

Abstract: Important features are considered in the analysis, e.g., 1) the small-strain stiffness of the soil, 2

Keywords： advanced finite element analysis     deep excavations     case history     small-strain stiffness    

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Development of a masticatory robot using a novel cable-driven linear actuator with bidirectional motion

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 4, doi: 10.1007/s11465-022-0687-1

Abstract: The CDLA presents remarkable advantages, such as lightweight and high stiffness structure, in using cableStiffness analysis and performance experiment validate the CDLA’s efficiency, with its stiffness reaching1379.6 N/mm (number of cable parts n = 4), which is 21.4 times the input wire stiffness.

Keywords： masticatory robot     cable-driven     linear actuator     parallel robot     stiffness analysis    

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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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Influence analysis of tower stiffness on suspension bridge

Cui Bing,Lin Qia,Yu Xudong,Tang Maolin,Tong Yuqiang

Strategic Study of CAE 2010, Volume 12, Issue 7,   Pages 33-38

Abstract:

In order to study the influence of tower stiffness on suspension bridgeSuspension Bridge as a prototype, established its finite element model by using BNLAS (Bridge Nonlinear AnalysisThen, the influence of suspension bridge structural performance with different tower stiffness was analyzedby changing the model's tower stiffness (0.7, 0.8, 0.9, 1.0, 1.1, 1.2 and 1.3 times of originaltower stiffness).

Keywords： tower stiffness     BNLAS     multi-mtower and multi-mspan     mid-mtower    

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Analysis of stiffness and flexural strength of a reinforced concrete beam using an invented reinforcement

Nazim Abdul NARIMAN, Martin HUSEK, Ilham Ibrahim MOHAMMAD, Kaywan Othman AHMED, Diyako DILSHAD, Ibrahim KHIDR

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 2,   Pages 378-389 doi: 10.1007/s11709-021-0706-z

Abstract: specimens of reinforced concrete beams using a three-point bending test to optimize the flexure and stiffnesswere collected and analyzed, and the flexural strength, the rate of damage during bending, and the stiffnessnumerical simulations, which demonstrated excellent similarities between the flexural failure and the stiffnessThe invented reinforcement system exhibited a high capability in boosting the flexure design and stiffness

Keywords： three-point flexure test     softening stage     flexural crack     flexural strain    

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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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Optimization of the mechanical performance and damage failure characteristics of laminated composites based on fiber orientation

Frontiers of Structural and Civil Engineering   Pages 1357-1369 doi: 10.1007/s11709-023-0996-4

Abstract: The influence of fiber orientation angle on the mechanical properties and stiffness degradation of theFurthermore, simulations have been conducted using finite element analysis and analytical approachestesting revealed that, although the composite laminates laid along the 0° direction exhibited the highest stiffness

Keywords： fiber orientation     composite laminates     stiffness degradation     analytical approaches     finite elementanalysis    

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Title Author Date Type Operation

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

Journal Article

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

Journal Article

Stiffness analysis and experimental validation of robotic systems

Giuseppe CARBONE

Journal Article

Meshing stiffness property and meshing status simulation of harmonic drive under transmission loading

Journal Article

A dynamic stiffness-based framework for harmonic input estimation and response reconstruction considering

Yixian LI; Limin SUN; Wang ZHU; Wei ZHANG

Journal Article

Discontinuous mechanical behaviors of existing shield tunnel with stiffness reduction at longitudinal

Journal Article

Mesh relationship modeling and dynamic characteristic analysis of external spur gears with gear wear

Journal Article

Nonlinear analysis of cable structures using the dynamic relaxation method

Mohammad REZAIEE-PAJAND, Mohammad MOHAMMADI-KHATAMI

Journal Article

Advanced finite element analysis of a complex deep excavation case history in Shanghai

Yuepeng DONG, Harvey BURD, Guy HOULSBY, Yongmao HOU

Journal Article

Development of a masticatory robot using a novel cable-driven linear actuator with bidirectional motion

Journal Article

Comparison of indices for stiffness performance evaluation

Giuseppe CARBONE, Marco CECCARELLI,

Journal Article

Influence analysis of tower stiffness on suspension bridge

Cui Bing,Lin Qia,Yu Xudong,Tang Maolin,Tong Yuqiang

Journal Article

Analysis of stiffness and flexural strength of a reinforced concrete beam using an invented reinforcement

Nazim Abdul NARIMAN, Martin HUSEK, Ilham Ibrahim MOHAMMAD, Kaywan Othman AHMED, Diyako DILSHAD, Ibrahim KHIDR

Journal Article

New nonlinear stiffness actuator with predefined torque‒deflection profile

Journal Article

Optimization of the mechanical performance and damage failure characteristics of laminated composites based on fiber orientation

Journal Article