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Review of pantograph and catenary interaction

Weihua ZHANG, Dong ZOU, Mengying TAN, Ning ZHOU, Ruiping LI, Guiming MEI

Frontiers of Mechanical Engineering 2018, Volume 13, Issue 2,   Pages 311-322 doi: 10.1007/s11465-018-0494-x

Abstract: with the existing studies, future research may prioritize the task of identifying the mechanism of contactforce variation.

Keywords： electrified railway     pantograph and catenary interaction     contact force variation     moving load problem     mechanical    

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Calculating frictional force with considering material microstructure and potential on contact surfaces

XU Zhongming, HUANG Ping

Frontiers of Mechanical Engineering 2007, Volume 2, Issue 4,   Pages 474-477 doi: 10.1007/s11465-007-0082-y

Abstract: energy dissipation mechanism of an Independent Oscillator model is used to calculate the frictional forceThe friction work is calculated with considering the potential change of contact surfaces during slidingThe relationships between frictional force and parameters of a tribo-system, such as surface energy andThe calculation results of the known experimental data denote that the frictional force is nearly proportionalThey also agree with the experimental results performed with an atomic-force microscope under the ultra

Keywords： coefficient     dissipation mechanism     universal adhesive     interfacial     Independent Oscillator    

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On the applicability of different adhesion models in adhesive particulate flows

Guanqing LIU, Shuiqing LI, Qiang YAO,

Frontiers in Energy 2010, Volume 4, Issue 2,   Pages 280-286 doi: 10.1007/s11708-009-0062-5

Abstract: quantitative criteria for the appropriate selection of adhesion models applicable to a specific adhesive contact

Keywords： adhesive contact     van der Waals force     adhesion model     adhesion map     DEM    

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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: Meshing force distribution affects the load sharing of the tooth during meshing, and theoretical researchThe displacement formulae of meshing point under tangential force are derived according to the torsionnumerical research show that the flexibility is quite different for varied meshing points and tangential forceamplitude because of the change of contact status between the flexspline and the wave generator.

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

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Thin-liquid-film evaporation at contact line

Hao WANG, Zhenai PAN, Zhao CHEN

Frontiers in Energy 2009, Volume 3, Issue 2,   Pages 141-151 doi: 10.1007/s11708-009-0020-2

Abstract: When a liquid wets a solid wall, the extended meniscus near the contact line may be divided into three

Keywords： meniscus     thin film     contact line     disjoining pressure     evaporation    

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Modelling of dynamic contact length in rail grinding process

Shaodan ZHI,Jianyong LI,A. M. ZAREMBSKI

Frontiers of Mechanical Engineering 2014, Volume 9, Issue 3,   Pages 242-248 doi: 10.1007/s11465-014-0305-y

Abstract: accumulated stress concentrations will cause the plastic deformation of rail towards generating corrugations, contactFirst of all, it’s important to analyze the contact length between the grinding stone and the rail, because the contact length is a critical parameter to measure the grinding capabilities of stones.Therefore the theoretical model for contact length is developed based on the geometrical analysis.

Keywords： rail grinding     contact length     dynamic model     Hamiltonian system     grinding stone     rail grinding car    

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Temperature variation of concrete box girder bridge

Jian WANG, Zhi FANG,

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 4,   Pages 407-413 doi: 10.1007/s11709-009-0053-y

Abstract: On the basis of theoretical analysis and measurement on site, the temperature gradients and its variation

Keywords： temperature     transfer     correlation     radiation     variation    

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Computation and investigation of mode characteristics in nonlinear system with tuned/mistuned contact

Houxin SHE, Chaofeng LI, Qiansheng TANG, Hui MA, Bangchun WEN

Frontiers of Mechanical Engineering 2020, Volume 15, Issue 1,   Pages 133-150 doi: 10.1007/s11465-019-0557-7

Abstract: This study derived a novel computation algorithm for a mechanical system with multiple friction contactThe procedure uses the incremental harmonic balance method to obtain the nonlinear parameters of the contactMoreover, this study analyzed the effects of the tuned and mistuned contact features on the nonlinear

Keywords： coupling vibration     nonlinear mode     original algorithm     contact interface    

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Assessment of liver volume variation to evaluate liver function

Cong Tong, Xinsen Xu, Chang Liu, Tianzheng Zhang, Kai Qu

Frontiers of Medicine 2012, Volume 6, Issue 4,   Pages 421-427 doi: 10.1007/s11684-012-0223-5

Abstract:

In order to assess the value of liver volumetry in cirrhosis and acute liver failure (ALF) patients, we explored the correlation between hepatic volume and severity of the hepatic diseases. The clinical data of 48 cirrhosis patients with 60 normal controls and 39 ALF patients were collected. Computed tomography-derived liver volume (CTLV) and body surface area (BSA) of normal controls were calculated to get a regression formula for standard liver volume (SLV) and BSA. Then CTLV and SLV of all patients were calculated and grouped by Child-Turcotte-Pugh classification for cirrhosis patients and assigned according to prognosis of ALF patients for further comparison. It turned out that the mean liver volume of the control group was 1 058±337 cm3. SLV was correlated with BSA according to the regression formula. The hepatic volume of cirrhosis patients in Child A, B level was not reduced, but in Child C level it was significantly reduced with the lowest liver volume index (CTLV/SLV). Likewise, in the death group of ALF patients, the volume index was significantly lower than that of the survival group. Based on volumetric study, we proposed an ROC (receiver operating characteristic) analysis to predict the prognosis of ALF patients that CTLV/SLV<83.9% indicates a poor prognosis. In conclusion, the CTLV/SLV ratio, which reflects liver volume variations, correlates well with the liver function and progression of cirrhosis and ALF. It is also a very useful marker for predicting the prognosis of ALF.

Keywords： liver volume variation     cirrhosis     acute liver failure (ALF)    

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Transient analysis of thermoelastic contact problem of disk brakes

Ali BELHOCINE, Mostefa BOUCHETARA

Frontiers of Mechanical Engineering 2013, Volume 8, Issue 2,   Pages 150-159 doi: 10.1007/s11465-013-0266-6

Abstract:

The main purpose of this study is to analyze the thermomechanical behavior of the dry contact betweenwith coupling to determine the deformation established and the Von Mises stresses in the disk, the contact

Keywords： brake disks     heat flux     heat-transfer coefficient     Von Mises stress     contact pressure    

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Experimental study and numerical simulation on compressive buckling behavior of thin steel skins in unilateral contact

Nicholas KEAGE, Christopher MAIOLO, Rebecca PIEROTTI, Xing MA

Frontiers of Structural and Civil Engineering 2011, Volume 5, Issue 3,   Pages 335-343 doi: 10.1007/s11709-011-0121-y

Abstract: practical test and finite element analysis has been undertaken to further investigate the effects of contactResults from both analyses have been examined and compared to data established from previous studies on contactThe result of the investigation has confirmed contact buckling theories and has foreshadowed the onsetof the newly observed phenomenon of secondary contact buckling.

Keywords： compressive     buckling     thin steel skins     unilateral contact     rigid constraints    

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Contact Pressure and Fatigue Life Prediction of Kiln Rolling Ring Under Intermittent Contact

Shi Yu,Xiao Yougang,Lei Xianming

Strategic Study of CAE 2006, Volume 8, Issue 7,   Pages 54-57

Abstract:

The mathematical models of contact pressure distribution between rolling ring and shell under intermittentcontact are set up, the formulae of bending moment and bending stress of tyre are obtained.

Keywords： rolling ring     contact pressure     support angle     fatigue life    

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Modeling limit force capacities of high force to volume lead extrusion dampers

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 3,   Pages 609-622 doi: 10.1007/s11709-021-0724-x

Abstract: Small volumetric sizes and high force capacities define high-force-to-volume (HF2V) devices, which canHowever, the design of such devices for specific force capacities has proven difficult based on the complexitiesThis study developed upper- and lower-bound force capacity estimates from analytical mechanics basedThe proposed models were validated by comparing the predicted bounds to experimental force capacity data/sub>) pair has a mean lower-bound gap of 36%, meaning the lower bound was 74% of the actual device force

Keywords： extrusion     lead dampers     upper and lower bound     analytical modelling     limit force    

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Performance of a hybrid anaerobic-contact oxidation biofilm baffled reactor for the treatment of decentralized

Minmin LIU,Ying ZHAO,Beidou XI,Li’an HOU,Xunfeng XIA

Frontiers of Environmental Science & Engineering 2014, Volume 8, Issue 4,   Pages 598-606 doi: 10.1007/s11783-013-0576-2

Abstract: A novel hybrid anaerobic-contact oxidation biofilm baffled reactor (HAOBR) was developed to simultaneouslyIn addition, the high solid retention time of contact oxidation biofilm contributed to stable performance

Keywords： combination filler     contact oxidation biofilm     food wastewater     anaerobic baffled reactor    

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A fast compound direct iterative algorithm for solving transient line contact elastohydrodynamic lubrication

Jian LIU,Yuxue CHEN,Zhenzhi HE,Shunian YANG

Frontiers of Mechanical Engineering 2014, Volume 9, Issue 2,   Pages 156-167 doi: 10.1007/s11465-014-0297-7

Abstract:

A fast compound direct iterative algorithm for solving transient line contact elastohydrodynamicTwo kinds of numerical results of transient EHL line contact problems under sinusoidal excitation or

Keywords： elastohydrodynamic lubrication     transient     line contact     matrix splitting iteration method     the Thomas method    

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Title Author Date Type Operation

Review of pantograph and catenary interaction

Weihua ZHANG, Dong ZOU, Mengying TAN, Ning ZHOU, Ruiping LI, Guiming MEI

Journal Article

Calculating frictional force with considering material microstructure and potential on contact surfaces

XU Zhongming, HUANG Ping

Journal Article

On the applicability of different adhesion models in adhesive particulate flows

Guanqing LIU, Shuiqing LI, Qiang YAO,

Journal Article

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

Journal Article

Thin-liquid-film evaporation at contact line

Hao WANG, Zhenai PAN, Zhao CHEN

Journal Article

Modelling of dynamic contact length in rail grinding process

Shaodan ZHI,Jianyong LI,A. M. ZAREMBSKI

Journal Article

Temperature variation of concrete box girder bridge

Jian WANG, Zhi FANG,

Journal Article

Computation and investigation of mode characteristics in nonlinear system with tuned/mistuned contact

Houxin SHE, Chaofeng LI, Qiansheng TANG, Hui MA, Bangchun WEN

Journal Article

Assessment of liver volume variation to evaluate liver function

Cong Tong, Xinsen Xu, Chang Liu, Tianzheng Zhang, Kai Qu

Journal Article

Transient analysis of thermoelastic contact problem of disk brakes

Ali BELHOCINE, Mostefa BOUCHETARA

Journal Article

Experimental study and numerical simulation on compressive buckling behavior of thin steel skins in unilateral contact

Nicholas KEAGE, Christopher MAIOLO, Rebecca PIEROTTI, Xing MA

Journal Article

Contact Pressure and Fatigue Life Prediction of Kiln Rolling Ring Under Intermittent Contact

Shi Yu,Xiao Yougang,Lei Xianming

Journal Article

Modeling limit force capacities of high force to volume lead extrusion dampers

Journal Article

Performance of a hybrid anaerobic-contact oxidation biofilm baffled reactor for the treatment of decentralized

Minmin LIU,Ying ZHAO,Beidou XI,Li’an HOU,Xunfeng XIA

Journal Article

A fast compound direct iterative algorithm for solving transient line contact elastohydrodynamic lubrication

Jian LIU,Yuxue CHEN,Zhenzhi HE,Shunian YANG

Journal Article