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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: Structure modal parameter online identification was used to monitor the structural health as evidenced

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

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Parameter studies on impact in a lap joint

Amir M. RAHMANI,Elizabeth K. ERVIN

Frontiers of Mechanical Engineering 2015, Volume 10, Issue 1, Pages 64-77 doi: 10.1007/s11465-014-0322-x

Abstract: Each parameter’s effect on system response is presented including unstable regions, unique trend

Keywords： impact mechanics contact joint behaviour modal analysis parameter study

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Study on the Design of Removable Grain Bed Dust Remover

Lv Baohe

Strategic Study of CAE 2007, Volume 9, Issue 10, Pages 45-48

Abstract:

The characteristics of the removable grain bed dust remover are analyzed and it has been compared with traditional dust removers. Combining with theoretic calculation and practical circulating experiments, the methods for the design and calculations of main configuration parameters and main performance parameters of the removable grain bed dust removers are put forward. These methods have been proved to have fairly higher practical application value.

Keywords： removable grain bed dust remover configuration parameter performance parameter

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Experimental study on velocity characteristics of recirculation zone in humid air non-premixed flame

GU Xin, ZANG Shusheng, GE Bing

Frontiers in Energy 2008, Volume 2, Issue 2, Pages 140-144 doi: 10.1007/s11708-008-0037-y

Abstract: under different co-flow air velocity conditions reveals that fuel-to-air velocity ratio is the crucial parameter

Keywords： distance bluff-body fuel-to-air velocity stagnation parameter

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Parametric study on damage control design of SMA dampers in frame-typed steel piers

Xiaoqun LUO, Hanbin GE, Tsutomu USAMI,

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 4, Pages 384-394 doi: 10.1007/s11709-009-0065-7

Abstract: A parametric study based on time history analyses is carried out on frame-typed bridge piers with axial-typeDesign recommendations are suggested following the results of the parametric study.

Keywords： damage control design shape memory alloy parameter study displacement-based verification strain-based

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Processing parameter optimization of fiber laser beam welding using an ensemble of metamodels and MOABC

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 4, doi: 10.1007/s11465-022-0703-5

Abstract: This study proposes a multi-objective optimization framework by combining an ensemble of metamodels (

Keywords： laser beam welding parameter optimization metamodel multi-objective

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Determination of effective stress parameter of unsaturated soils: A Gaussian process regression approach

Pijush Samui, Jagan J

Frontiers of Structural and Civil Engineering 2013, Volume 7, Issue 2, Pages 133-136 doi: 10.1007/s11709-013-0202-1

Abstract: article examines the capability of Gaussian process regression (GPR) for prediction of effective stress parametervolumetric water content ( ), residual water content ( ), bubbling pressure ( ), suction ( ) and fitting parameterA comparative study has been carried out between the developed GPR and Artificial Neural Network (ANNA sensitivity analysis has been done to determine the effect of each input parameter on .

Keywords： unsaturated soil effective stress parameter Gaussian process regression (GPR) artificial neural network

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1000 MW ultra-supercritical turbine steam parameter optimization

FENG Weizhong

Frontiers in Energy 2008, Volume 2, Issue 2, Pages 187-193 doi: 10.1007/s11708-008-0030-5

Abstract: The 2 × 1000 MW ultra-supercritical steam turbine of Shanghai Waigaoqiao Phase III project, which uses grid frequency regulation and overload control through an overload valve, is manufactured by Shanghai Turbine Company using Siemens technology. Through optimization, the steam pressure is regarded as the criterion between constant pressure and sliding pressure operation. At high circulating water temperature, the turbine overload valve is kept closed when the unit load is lower than 1000 MW while at other circulating water temperatures the turbine can run in sliding pressure operation when the unit load is higher than 1000 MW and the pressure is lower than 27 MPa This increases the unit operation efficiency. The 3D bending technology in the critical piping helps to reduce the project investment and minimize the reheat system pressure drop which improves the unit operation efficiency and safety. By choosing lower circulating water design temperature and by setting the individual Boiler Feedwater Turbine condenser to reduce the exhaust steam flow and the heat load to the main condenser, the unit average back pressure and the terminal temperature difference are minimized. Therefore, the unit heat efficiency is increased.

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Structural parameter design method for a fast-steering mirror based on a closed-loop bandwidth

Guozhen CHEN, Pinkuan LIU, Han DING

Frontiers of Mechanical Engineering 2020, Volume 15, Issue 1, Pages 55-65 doi: 10.1007/s11465-019-0545-y

Abstract: This study proposes a structural parameter design approach for an FSM system based on the quantitative

Keywords： fast-steering mirror structural parameter PI controller bandwidth notch filter

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Energy efficient cutting parameter optimization

Xingzheng CHEN, Congbo LI, Ying TANG, Li LI, Hongcheng LI

Frontiers of Mechanical Engineering 2021, Volume 16, Issue 2, Pages 221-248 doi: 10.1007/s11465-020-0627-x

Abstract: Over the past 10 years, many researchers have been engaged in energy efficient cutting parameter optimizationThis paper conducts a comprehensive literature review of current studies on energy efficient cutting parameterCurrent studies on energy efficient cutting parameter optimization by using experimental design methodCombined with the current status, future research directions of energy efficient cutting parameter optimization

Keywords： energy efficiency cutting parameter optimization machining process

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Hierarchical parameter estimation of DFIG and drive train system in a wind turbine generator

Xueping PAN, Ping JU, Feng WU, Yuqing JIN

Frontiers of Mechanical Engineering 2017, Volume 12, Issue 3, Pages 367-376 doi: 10.1007/s11465-017-0429-y

Abstract:

A new hierarchical parameter estimation method for doubly fed induction generator (DFIG) and drive

Keywords： wind turbine generator DFIG drive train system hierarchical parameter estimation method trajectory sensitivity

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Variational mode decomposition based modal parameter identification in civil engineering

Mingjie ZHANG, Fuyou XU

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 5, Pages 1082-1094 doi: 10.1007/s11709-019-0537-3

Abstract: An out-put only modal parameter identification method based on variational mode decomposition (VMD) isconducted to demonstrate the efficiency and highlight the superiority of the proposed method in modal parameterThe proposed method is proved to be efficient and accurate in modal parameter identification for bothlinear and nonlinear civil structures, including structures with closely spaced modes, sudden modal parameter

Keywords： modal parameter identification variational mode decomposition civil structure nonlinear system closely

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Study on temperature effects of single expansion joint bridge

Zhao Yibin and Shao Xudong

Strategic Study of CAE 2012, Volume 14, Issue 10, Pages 103-112

Abstract: Moreover, taking the different temperatures into account, parameter analysis was performed.

Keywords： single expansion bridge temperature effect stress and deformation theoretical formula parameter analysis

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Shallow foundation response variability due to soil and model parameter uncertainty

Prishati RAYCHOWDHURY,Sumit JINDAL

Frontiers of Structural and Civil Engineering 2014, Volume 8, Issue 3, Pages 237-251 doi: 10.1007/s11709-014-0242-1

Abstract: The present work intends to investigate the effect of soil and model parameter uncertainty on the response

Keywords： shallow foun dation sensitivity analysis centrifuge data first-order-second-moment (FOSM) method parameter

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Study on stuctural system of Sutong Bridge

Zhang Xigang,Pei Minshan,Yuan Hong,Xu Liping,Zhu Bin

Strategic Study of CAE 2009, Volume 11, Issue 3, Pages 20-25

Abstract:

Sutong Bridege, whose layout is ( 100 + 100 + 300 ) + 1 088 + ( 300 +100 + 100 ) m, marks the largest span of cable-stayed bridges in the world. The complex natural condition at thr bridge site and the strict requirements for resistance of wind and seismic action make it crucial to choose a favorable structural system to addure the funcrion and safety of the bridge. The comparsion among several optional structural systems for Sutong Bridge is illustrated, the optional structural systems contain floating, viscous damper, hydraulic buffer, and fixed system. After detailed analysis is carried out for viscous damper and hydraulic buffer, super liquid viscous damper with additional displacement limitation is designed for the first application in bridge engineering. The parameters for the damper is analyzed and studied and the dampers are installed sucessfully after required damper tests.

Keywords： Sutong cable-stayed bridge structural system damper damper parameter displacement