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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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Operating characteristic analysis on the ultra-thin low temperature floor-heating system

Hualing ZHANG, Xiaopeng SONG

Frontiers of Structural and Civil Engineering 2013, Volume 7, Issue 2,   Pages 127-132 doi: 10.1007/s11709-013-0200-3

Abstract: However, there is a lack of operating characteristic research in this region, especially the energy consumptionThe test results show that the floor heating system could almost satisfy thermal comfort requirementConsidering both the thermal lag and operating efficiency, a reasonable suggestion was proposed in this

Keywords： ultra-thin floor heating panel     the preheating time     thermal comfort     energy saving    

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Analysis of the dynamic hysteresis characteristic of finger seal

LEI Yanni, CHEN Guoding

Frontiers of Mechanical Engineering 2007, Volume 2, Issue 1,   Pages 32-36 doi: 10.1007/s11465-007-0005-y

Abstract: The research about hysteresis characteristic of finger seal (FS), which was carried out based on theparameters, structure parameters as well as working parameters in the system were given out through the analysisof finite element analysis result.A mass spring damper dynamics model of FS system was proposed and the hysteresis characteristic of theThis work shows that the dynamics characteristic analysis of the FS is necessary and the dynamics model

Keywords： FS     necessary     hysteresis characteristic     optimization     spring    

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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: Gear wear is one of the most common gear failures, which changes the mesh relationship of normal gear. A new mesh relationship caused by gear wear affects meshing excitations, such as mesh stiffness and transmission error, and further increases vibration and noise level. This paper aims to establish the model of mesh relationship and reveal the vibration characteristics of external spur gears with gear wear. A geometric model for a new mesh relationship with gear wear is proposed, which is utilized to evaluate the influence of gear wear on mesh stiffness and unloaded static transmission error (USTE). Based on the mesh stiffness and USTE considering gear wear, a gear dynamic model is established, and the vibration characteristics of gear wear are numerically studied. Comparison with the experimental results verifies the proposed dynamic model based on the new mesh relationship. The numerical and experimental results indicate that gear wear does not change the structure of the spectrum, but it alters the amplitude of the meshing frequencies and their sidebands. Several condition indicators, such as root-mean-square, kurtosis, and first-order meshing frequency amplitude, can be regarded as important bases for judging gear wear state.

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

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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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Air-borne noise of thermal module and system for notebook personal computers: experimental study

SHI Junye, JIANG Cailing, QIAO Junsheng, CHEN Jiangpin, LI Xiaoping, ZHANG Xiaojun

Frontiers in Energy 2008, Volume 2, Issue 2,   Pages 174-178 doi: 10.1007/s11708-008-0034-1

Abstract: Thermal performance is the most important issue to be considered when a thermal module is designed forExperiments were conducted to study the noise sources, the noise characteristic and the main factorsThe difference between the air-borne noise of the thermal module and the whole computer system was analyzed

Keywords： air-borne     attention     propagating     characteristic     personal computer    

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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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Experiment and surge analysis of centrifugal two-stage turbocharging system

HE Yituan, MA Chaochen

Frontiers of Mechanical Engineering 2008, Volume 3, Issue 4,   Pages 365-368 doi: 10.1007/s11465-008-0073-7

Abstract: leading to a two-stage turbocharging system’s surge can be analyzed according to the corrected mass flow characteristic

Keywords： auto-modeling     compressor     Reynolds number     characteristic     standard condition    

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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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Title Author Date Type Operation

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

Operating characteristic analysis on the ultra-thin low temperature floor-heating system

Hualing ZHANG, Xiaopeng SONG

Journal Article

Analysis of the dynamic hysteresis characteristic of finger seal

LEI Yanni, CHEN Guoding

Journal Article

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

Journal Article

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

Air-borne noise of thermal module and system for notebook personal computers: experimental study

SHI Junye, JIANG Cailing, QIAO Junsheng, CHEN Jiangpin, LI Xiaoping, ZHANG Xiaojun

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

Experiment and surge analysis of centrifugal two-stage turbocharging system

HE Yituan, MA Chaochen

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