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Isogeometric analysis of coupled thermo-elastodynamic problems under cyclic thermal shock

Asghar AMANI DASHLEJEH

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 2,   Pages 397-405 doi: 10.1007/s11709-018-0473-7

Abstract: The isogeometric analysis (IGA) method was extended for the solution of the coupled thermo-elastodynamicthe proposed method was verified against a two-dimensional benchmark example subjected to constant thermalThen a two-dimensional half-space benchmark example under thermal shock was solved.Finally, cyclic thermal shock (CTS) loading was applied on the half-space problem.The results dedicated that IGA can be used as a suitable approach in the analysis of the general thermomechanical

Keywords： isogeometric analysis     coupled thermo-elastodynamic     dynamic analysis     generalized newmark     cyclic thermal    

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Flow, thermal, and vibration analysis using three dimensional finite element analysis for a flux reversal

B. VIDHYA,K. N. SRINIVAS

Frontiers in Energy 2016, Volume 10, Issue 4,   Pages 424-440 doi: 10.1007/s11708-016-0423-9

Abstract: ., computational fluid dynamic (CFD), thermal, and vibration.The results of CFD are mainly obtained to fine tune the thermal analysis.Thus, in this focus, a flow analysis assisted thermal analysis is presented to predict the steady stateThe vibration analysis is illustrated.Harmonic analysis such as sine sweep analysis to identify the range of speeds causing high vibrations

Keywords： flux reversal generator     air velocity     computation fluid dynamics     thermal analysis     vibration analysis     finiteelement analysis    

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Risk-based probabilistic thermal-stress analysis of concrete arch dams

Narjes SOLTANI, Mohammad ALEMBAGHERI, Mohammad Houshmand KHANEGHAHI

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 5,   Pages 1007-1019 doi: 10.1007/s11709-019-0521-y

Abstract: The probabilistic risk of arch dam failure under thermal loading is studied.The deterministic thermal finite element analysis of the dam is combined with the structural reliabilitythe risk analysis context.The tensile overstressing failure mode is considered for the reliability analysis.The thermal loading includes ambient air and reservoir temperature variations.

Keywords： arch dams     probabilistic analysis     thermal stress     sensitivity     reliability    

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Thermal fluid-structure interaction and coupled thermal-stress analysis in a cable stayed bridge exposed

Nazim Abdul NARIMAN

Frontiers of Structural and Civil Engineering 2018, Volume 12, Issue 4,   Pages 609-628 doi: 10.1007/s11709-018-0452-z

Abstract: In this paper, thermal fluid structure-interaction (TFSI) and coupled thermal-stress analysis are utilizedVorticity and thermal convection fields of three fire scenarios are simulated and analyzed.The results revealed that TFSI models and coupled thermal-stress models are significant in detecting

Keywords： fire scenario     transient heat transfer     TFSI model     coupled thermal-stress     XFEM    

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Thermal analysis of lubricated three-dimensional contact bodies considering interface roughness

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 2, doi: 10.1007/s11465-022-0672-8

Abstract: Surface roughness and thermal action are of remarkable importance in the lubrication performance of mechanicalIn this paper, a deterministic mixed thermal elastohydrodynamic lubrication model considering real 3Dsurface roughness and thermal effects is proposed.The influences of surface roughness and thermal effect on lubrication performance are revealed.The results show that the proposed model can be used as a powerful analysis tool for lubrication performance

Keywords： thermal elastohydrodynamic lubrication     surface roughness effect     thermal effect     temperature characteristics    

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Variation in humic and fulvic acids during thermal sludge treatment assessed by size fractionation, elementaryanalysis, and spectroscopic methods

Yuning YANG,Huan LI,Jinyi LI

Frontiers of Environmental Science & Engineering 2014, Volume 8, Issue 6,   Pages 854-862 doi: 10.1007/s11783-014-0755-9

Abstract: Thermal pretreatment can be applied to sludge anaerobic digestion or dewatering.To analyze the variation in humic substances during thermal sludge treatment, sludge humic and fulvicacids were extracted before and after 30-min thermal treatment at 180°C, and then their contents, molecularshowed that the total contents of humic and fulvic acids in the sludge almost remained constant during thermalslight change, i.e. some oxygen functional groups disappeared and aromatic structures increased after thermal

Keywords： sludge     thermal treatment     humic acids     fulvic acids    

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Equivalent thermal conductivity of heat pipes

LU Zesheng, MA Binghui

Frontiers of Mechanical Engineering 2008, Volume 3, Issue 4,   Pages 462-466 doi: 10.1007/s11465-008-0087-1

Abstract: In precision machining, the machining error from thermal distortion carries a high proportion of theIf a precision machining tool can transfer heat fast, the thermal distortion will be reduced and theduring the heat transfer process because thermal conductivity or equivalent thermal conductivity shouldAn equivalent thermal conductivity model based on equivalent thermal resistances is established.The proposed model provides a calculation method for the thermal distortion analysis of heat pipes applied

Keywords： proposed     distortion analysis     hydrostatic motorized     motorized spindle     Performance    

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Influence evaluation of loading conditions during pressurized thermal shock transients based on thermal-hydraulics

Jinya KATSUYAMA, Shumpei UNO, Tadashi WATANABE, Yinsheng LI

Frontiers of Mechanical Engineering 2018, Volume 13, Issue 4,   Pages 563-570 doi: 10.1007/s11465-018-0487-9

Abstract:

The thermal hydraulic (TH) behavior of coo-lant water is a key factor in the structural integrityassessments on reactor pressure vessels (RPVs) of pressurized water reactors (PWRs) under pressurized thermalmain components of both primary and secondary systems, and performed TH analyses by using a system analysisBased on the results of TH analysis with different operator action times, we also performed structuralanalyses for evaluating thermal-stress distributions in the RPV during PTS events as loading conditions

Keywords： structural integrity     reactor pressure vessel     pressurized thermal shock     thermal hydraulic analysis     pressurized    

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A modified zone model for estimating equivalent room thermal capacity

Hua CHEN, Xiaolin WANG

Frontiers in Energy 2013, Volume 7, Issue 3,   Pages 351-357 doi: 10.1007/s11708-013-0254-x

Abstract: The zone model has been widely applied in control analysis of heating, ventilation and air conditioningconsideration the effect of envelop heat reservoir on the room indoor temperature by introducing the thermalThe thermal admittance for the building enclosure was developed based on the building thermal network

Keywords： room model     thermal network analysis     transfer function     heating     ventilation and air conditioning (HVAC)    

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Steady-state thermal-hydraulic analysis of SCWR assembly

LIU Xiaojing, CHENG Xu

Frontiers in Energy 2008, Volume 2, Issue 4,   Pages 475-478 doi: 10.1007/s11708-008-0093-3

Abstract: supercritical water-cooled reactor (SCWR), the only reactor with water as coolant, achieves a high thermalA thermal-hydraulic analysis of the SCWR assembly is performed in this paper using the modified COBRA-IVreduce the hot channel factor are investigated: decreasing the moderator mass flow and increasing the thermal

Keywords： cladding temperature     assembly     temperature     coolant     resistance    

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Thermal and energy analysis of a Chinese kang

Zhi ZHUANG, Yuguo LI, Xudong YANG, Bin CHEN, Jiaping LIU,

Frontiers in Energy 2010, Volume 4, Issue 1,   Pages 84-92 doi: 10.1007/s11708-010-0009-x

Abstract: smoke flow and heat transfer model of an elevated kang is integrated in a widely-used building energy analysissoftware in China–DeST, and the integrated software can be used for the thermal performance analysisBased on the simulation results, it is found that the thermal comfort requirement of the outside surface

Keywords： Chinese kang     elevated kang     rural house thermal modeling     building energy efficiency     DeST    

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Thermogravimetric coupled with Fourier transform infrared analysis study on thermal treatment of monopotassium

Yuheng FENG, Xuguang JIANG, Yong CHI, Xiaodong LI, Hongmei ZHU

Frontiers of Environmental Science & Engineering 2011, Volume 5, Issue 2,   Pages 186-192 doi: 10.1007/s11783-011-0322-6

Abstract: Both pyrolysis and combustion runs can be subdivided into three stages: drying, thermal decompositionThe average weight loss rate during fast thermal decomposition stage in pyrolysis is higher than combustion

Keywords： hazardous waste     combustion     pyrolysis     thermogravimetric coupled with Fourier transform infrared analysis    

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Thermal characteristic analysis and thermal design technology for high speed high precision machine tools

Gao Jianmin,Shi Xiaojun,Xu Aiming and Zhao Boxuan

Strategic Study of CAE 2013, Volume 15, Issue 1,   Pages 28-33

Abstract:

Based on how to improve the inherent thermal performance of high speed high precision machine tools, theories and methods about thermal characteristic analysis, thermal structure optimizationprovide reference for machine tools researchers and designers, the latest progress and technology on thermal

Keywords： high speed high precision machine tool     thermal characteristic analysis     thermal structure optimization    

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Reliability Design and Analysis of Spacecraft Thermal Cont rol/Thermal Management System

Li Yunze ,Ning Xianwen ,Wang Xiaoming ,Shi Xiaobo

Strategic Study of CAE 2007, Volume 9, Issue 7,   Pages 53-56

Abstract:

Based on the developing demand of spacecraft thermal control and thermalmanagement, basic design schemes and analysis models for maintaining thermal control/thermal managementExamples are given to show the application patterns and methods of the reliability design schemes and analysismodels, which provide a fundamental tool for advanced design and analysis for the reliability of spacecraftthermal control and thermal management system.

Keywords： spacecraft     thermal control     thermal management     reliability    

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Theory analysis and system identification methods on thermal dynamics characteristics of ballscrews

XIA Junyong, HU Youmin, WU Bo, SHI Tielin

Frontiers of Mechanical Engineering 2008, Volume 3, Issue 4,   Pages 408-415 doi: 10.1007/s11465-008-0061-y

Abstract: Empirical model of machine tools on thermal error has been widely researched, which can compensate forthermal error to some extent but not suitable for thermal dynamic errors produced by dynamic heat sourcesnetwork (ANN) system identification) are put forward to establish a dynamic characteristic model of thermalThe model of thermal error of the axis in a feed system of DM4600 vertical miller is established with

Keywords： square system     network     vertical miller     transfer     ANN    

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Title Author Date Type Operation

Isogeometric analysis of coupled thermo-elastodynamic problems under cyclic thermal shock

Asghar AMANI DASHLEJEH

Journal Article

Flow, thermal, and vibration analysis using three dimensional finite element analysis for a flux reversal

B. VIDHYA,K. N. SRINIVAS

Journal Article

Risk-based probabilistic thermal-stress analysis of concrete arch dams

Narjes SOLTANI, Mohammad ALEMBAGHERI, Mohammad Houshmand KHANEGHAHI

Journal Article

Thermal fluid-structure interaction and coupled thermal-stress analysis in a cable stayed bridge exposed

Nazim Abdul NARIMAN

Journal Article

Thermal analysis of lubricated three-dimensional contact bodies considering interface roughness

Journal Article

Variation in humic and fulvic acids during thermal sludge treatment assessed by size fractionation, elementaryanalysis, and spectroscopic methods

Yuning YANG,Huan LI,Jinyi LI

Journal Article

Equivalent thermal conductivity of heat pipes

LU Zesheng, MA Binghui

Journal Article

Influence evaluation of loading conditions during pressurized thermal shock transients based on thermal-hydraulics

Jinya KATSUYAMA, Shumpei UNO, Tadashi WATANABE, Yinsheng LI

Journal Article

A modified zone model for estimating equivalent room thermal capacity

Hua CHEN, Xiaolin WANG

Journal Article

Steady-state thermal-hydraulic analysis of SCWR assembly

LIU Xiaojing, CHENG Xu

Journal Article

Thermal and energy analysis of a Chinese kang

Zhi ZHUANG, Yuguo LI, Xudong YANG, Bin CHEN, Jiaping LIU,

Journal Article

Thermogravimetric coupled with Fourier transform infrared analysis study on thermal treatment of monopotassium

Yuheng FENG, Xuguang JIANG, Yong CHI, Xiaodong LI, Hongmei ZHU

Journal Article

Thermal characteristic analysis and thermal design technology for high speed high precision machine tools

Gao Jianmin,Shi Xiaojun,Xu Aiming and Zhao Boxuan

Journal Article

Reliability Design and Analysis of Spacecraft Thermal Cont rol/Thermal Management System

Li Yunze ,Ning Xianwen ,Wang Xiaoming ,Shi Xiaobo

Journal Article

Theory analysis and system identification methods on thermal dynamics characteristics of ballscrews

XIA Junyong, HU Youmin, WU Bo, SHI Tielin

Journal Article