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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 dynamic relaxation method (DRM) is an explicit procedure for analyzing these types of structures.

Keywords： nonlinear analysis     cable structure     stiffness matrix     dynamic relaxation method    

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Finding buckling points for nonlinear structures by dynamic relaxation scheme

Mohammad REZAIEE-PAJAND, Hossein ESTIRI

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 1,   Pages 23-61 doi: 10.1007/s11709-019-0549-z

Abstract: Dynamic Relaxation Method (DRM) is an explicit approach for solving the simultaneous systems of equationstactic, the fictitious mass and damping are added to the static governing equations, and an artificial dynamicMixing the dynamic relaxation scheme with external work technique has not been formulated so far.In fact, the suggested load factor depends only on the Dynamic Relaxation (DR) fictitious parameters.It is shown that author’s technique is quicker than the other dynamic relaxation strategies.

Keywords： load factor     external work     dynamic relaxation     static equilibrium path     large displacement    

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A fast and accurate dynamic relaxation scheme

Mohammad REZAIEE-PAJAND, Mohammad MOHAMMADI-KHATAMI

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 1,   Pages 176-189 doi: 10.1007/s11709-018-0486-2

Abstract: Dynamic relaxation method (DRM) is one of the suitable numerical procedures for nonlinear structuralAdding the fictitious inertia and damping forces to the static equation, and turning it to the dynamicBased on this formulation, a new time step is found for the viscous dynamic relaxation.

Keywords： viscous dynamic relaxation     time step     displacement error     geometric nonlinear analysis    

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Deformation control criterion of shield tunnel under lateral relaxation of soft soil

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 5,   Pages 780-795 doi: 10.1007/s11709-023-0944-3

Abstract: Metro shield tunnels under the lateral relaxation of soil (LRS) are susceptible to significant lateralFor a shield tunnel with a diameter of approximately 6 m and under the lateral relaxation of sandy soil

Keywords： shield tunnel     lateral relaxation of soil     deformation control criterion of segment structure     model    

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Dynamic simulation based optimized design method of concrete production system for RCC dam

ZHAO Chunju, ZHOU Yihong

Frontiers of Structural and Civil Engineering 2007, Volume 1, Issue 4,   Pages 405-410 doi: 10.1007/s11709-007-0055-6

Abstract: Therefore, a dynamic simulation mode

Keywords： interacted     dynamic simulation     construction     resource     RCC    

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The stress relaxation of cement clinkers under high temperature

Xiufang WANG,Yiwang BAO,Xiaogen LIU,Yan QIU

Frontiers of Mechanical Engineering 2015, Volume 10, Issue 4,   Pages 413-417 doi: 10.1007/s11465-015-0357-7

Abstract: This research provides a theoretical proof for the mechanism of the stress relaxation of cement clinkersCompression stress relaxation under various high temperatures is discussed using a specially developedThe cell shows that stress relaxation dramatically increases and that the remaining stress rapidly decreases

Keywords： stress relaxation     high temperature     cement clinker     compression     elastic modulus    

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Separating method and dynamic processes of Nano-Al13

GAO Baoyu, YUE Qinyan, WANG Xiaona, CHU Yongbao, KONG Chunyan

Frontiers of Environmental Science & Engineering 2007, Volume 1, Issue 3,   Pages 368-373 doi: 10.1007/s11783-007-0063-8

Abstract: The dynamic process and aggregation state of kaolin suspensions coagulating with Nano-Al, PAC and AlClThe experimental results indicated that the ethanol-acetone resolving method was simple and could separateThe SO/Ba displacement method could separate PAC solutions at high concentrations.The coagulation efficiency and dynamic experimental results showed that Nano-Al with high positive-chargedThe dynamic process results showed that Nano-Al also had the best recovery capability after shearing

Keywords： displacement     PAC     coagulation efficiency     poly-aluminum     inorganic    

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An efficient method for the dynamic interaction of open structure-foundation systems

LIU Jingbo, GU Yin, LI Bin, WANG Yan

Frontiers of Structural and Civil Engineering 2007, Volume 1, Issue 3,   Pages 340-345 doi: 10.1007/s11709-007-0045-8

Abstract: Subsequently, the modal superposition method is adopted to solve the approximated hermetic system.This procedure is highly efficient in analyzing dynamic structure-foundation interaction problems inTwo numerical examples are presented to illustrate the characteristics of the proposed method: one isa wave source problem in 2-dimensions (2-D) elastic semi-infinite space, and the other is a dynamicCompared with the traditional direct step-by-step integration method, the proposed method, with a sufficient

Keywords： structure-foundation interaction     superposition     interaction problem     freedom     efficient    

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Identification of dynamic stiffness matrix of bearing joint region

Feng HU, Bo WU, Youmin HU, Tielin SHI

Frontiers of Mechanical Engineering 2009, Volume 4, Issue 3,   Pages 289-299 doi: 10.1007/s11465-009-0064-3

Abstract: The paper proposes an identification method of the dynamic stiffness matrix of a bearing joint regionThe author deduces an identification model of the dynamic stiffness matrix from the synthetic substructuremethod.The dynamic stiffness matrix of the bearing joint region can be identified by measuring the matrix ofelement model, agrees with experimental results, and there is very high reliability in the identified dynamic

Keywords： frequency response function (FRFs)     dynamic stiffness     finite element     synthetic substructure method     joint    

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Improved numerical method for time domain dynamic structure-foundation interaction analysis based onscaled boundary finite element method

DU Jianguo, LIN Gao

Frontiers of Structural and Civil Engineering 2008, Volume 2, Issue 4,   Pages 336-342 doi: 10.1007/s11709-008-0054-2

Abstract: Based on the reduced set of base function in scaled boundary finite element method (SBFEM), an improvedtime domain numerical approach for the dynamic structure-foundation interaction analysis was proposed

Keywords： structure-foundation interface     computational efficiency     different     suitable     numerical approach    

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Explicit finite element method for calculation and analysis to the elasto-plastic dynamic response of

LI Liang, DU Xiuli, LI Liyun, ZHAO Chenggang

Frontiers of Structural and Civil Engineering 2007, Volume 1, Issue 4,   Pages 436-442 doi: 10.1007/s11709-007-0059-2

Abstract: In order to describe the elasto-plastic dynamic response of fluid-saturated porous media, the incrementalAt last, the time discretization of this formula is carried out with the integral method which consistsof central difference method and Newmark constant average acceleration method to get the explicit timeOn the basis of the integral formula mentioned above, the time-domain explicit finite element methodis developed for calculation and analysis of the elasto-plastic dynamic response of fluid-saturated porous

Keywords： discretization     computational     calculation     integral     requirement    

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A block zero-padding method based on DCFT for L1 parameter estimations in weak signal and high dynamic

Chao WU,Lu-ping XU,Hua ZHANG,Wen-bo ZHAO

Frontiers of Information Technology & Electronic Engineering 2015, Volume 16, Issue 9,   Pages 796-804 doi: 10.1631/FITEE.1500058

Abstract: Weak L1 signal acquisition in a high dynamic environment primarily faces a challenge: the integrationestimations in weak signal and high dynamic environments.The proposed method combines DCFT and block zero-padding.Simulation results show that compared with the BASIC method, the proposed method can precisely detectthe high dynamic parameters in lower SNR when the length of the received signal is fixed.

Keywords： Threshold detection     Discrete chirp-Fourier transform     Block zero-padding     High dynamic     Weak L1 signal    

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A dynamic model of mobile concrete pump boom based on discrete time transfer matrix method

Wu REN, Yunxin WU, Zhaowei ZHANG

Frontiers of Mechanical Engineering 2013, Volume 8, Issue 4,   Pages 360-366 doi: 10.1007/s11465-013-0280-8

Abstract: Due to posture constantly change in working process, kinematic rule and dynamic characteristic are difficultdynamics model of a mobile concrete pump boom is established based on discrete time transfer matrix methodThe overall dynamic equation and transfer matrix of the model can be assembled by sub-structures A andThe displacement and rotation angle curves of the proposed method fit well with the ADAMS model.So it is suitable for mobile concrete pump boom real-time monitoring and dynamic analysis.

Keywords： multi-body     mobile concrete pump boom     discrete time transfer matrix method (DTTMM)     kinematic     dynamic     tip    

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The Forward Recurrent Method for Dynamic Programming

Zhang Zhao,Pei Yanling,Zhang Renbao

Strategic Study of CAE 2005, Volume 7, Issue 2,   Pages 62-65

Abstract:

Backward recurrent method is usually adopted in seeking optimal solution by dynamic programming.A forward recurrent method to find optimal solution by dynamic programming is presented on the basisThe fundamental equation of dynamic programming and Millton-Jacobi's equation are also derived.It's an exploratory study on optimal solution of dynamic programming.the method is expanded.

Keywords： dynamic programming     multi-level decision     functional equation     optimal solution    

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Evaluation of site response characteristic using nonlinear method (Case study: Babol, Iran)

Asskar Janalizadeh CHOOBBASTI, Sadegh REZAEI, Farzad FARROKHZAD, Pedram Haidarzaeh AZAR

Frontiers of Structural and Civil Engineering 2014, Volume 8, Issue 1,   Pages 69-82 doi: 10.1007/s11709-014-0231-4

Abstract: Dynamic analysis was performed in time domain, using fully nonlinear model by PLAXIS.Finally the obtained response spectra from fully nonlinear method were compared with site response spectra

Keywords： fully nonlinear method     site effect     dynamic analysis     response spectra    

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Title Author Date Type Operation

Nonlinear analysis of cable structures using the dynamic relaxation method

Mohammad REZAIEE-PAJAND, Mohammad MOHAMMADI-KHATAMI

Journal Article

Finding buckling points for nonlinear structures by dynamic relaxation scheme

Mohammad REZAIEE-PAJAND, Hossein ESTIRI

Journal Article

A fast and accurate dynamic relaxation scheme

Mohammad REZAIEE-PAJAND, Mohammad MOHAMMADI-KHATAMI

Journal Article

Deformation control criterion of shield tunnel under lateral relaxation of soft soil

Journal Article

Dynamic simulation based optimized design method of concrete production system for RCC dam

ZHAO Chunju, ZHOU Yihong

Journal Article

The stress relaxation of cement clinkers under high temperature

Xiufang WANG,Yiwang BAO,Xiaogen LIU,Yan QIU

Journal Article

Separating method and dynamic processes of Nano-Al13

GAO Baoyu, YUE Qinyan, WANG Xiaona, CHU Yongbao, KONG Chunyan

Journal Article

An efficient method for the dynamic interaction of open structure-foundation systems

LIU Jingbo, GU Yin, LI Bin, WANG Yan

Journal Article

Identification of dynamic stiffness matrix of bearing joint region

Feng HU, Bo WU, Youmin HU, Tielin SHI

Journal Article

Improved numerical method for time domain dynamic structure-foundation interaction analysis based onscaled boundary finite element method

DU Jianguo, LIN Gao

Journal Article

Explicit finite element method for calculation and analysis to the elasto-plastic dynamic response of

LI Liang, DU Xiuli, LI Liyun, ZHAO Chenggang

Journal Article

A block zero-padding method based on DCFT for L1 parameter estimations in weak signal and high dynamic

Chao WU,Lu-ping XU,Hua ZHANG,Wen-bo ZHAO

Journal Article

A dynamic model of mobile concrete pump boom based on discrete time transfer matrix method

Wu REN, Yunxin WU, Zhaowei ZHANG

Journal Article

The Forward Recurrent Method for Dynamic Programming

Zhang Zhao,Pei Yanling,Zhang Renbao

Journal Article

Evaluation of site response characteristic using nonlinear method (Case study: Babol, Iran)

Asskar Janalizadeh CHOOBBASTI, Sadegh REZAEI, Farzad FARROKHZAD, Pedram Haidarzaeh AZAR

Journal Article