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intelligent compaction 2

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arch dam 1

asphalt mixture 1

bearing-rotor system 1

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Intelligent compaction theory of high roller compacted concrete dam

Liu Donghai,Li Bingyang,Cui Bo

Strategic Study of CAE 2011, Volume 13, Issue 12,   Pages 74-79

Abstract:

In the paper, the concept and realization process of intelligent compactionfor high roller compacted concrete dam construction was presented, as well as the theory of real-timeBased on the analysis of real-time compaction index, a multiple regression model of the dam compactnesswas established and a real-time estimation method of compaction quality of the entire work area forroller compacted concrete dam was proposed finally.

Keywords： roller compacted concrete（RCC）dam     quality control     intelligent compaction     real-time monitoring     real-time    

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Numerical simulation of compaction parameters for sand-filled embankment using large thickness sand filling

Wentao WANG, Chongzhi TU, Rong LUO

Frontiers of Structural and Civil Engineering 2018, Volume 12, Issue 4,   Pages 568-576 doi: 10.1007/s11709-017-0444-4

Abstract: research on the compacting effects of sand-filled layers in larger thicknesses by 22 ton vibratory rolleralone, and then to investigate the steady compacting effect of 12 ton vibratory roller.sand-filled embankment project with tight construction period is suggested to choose the 12 ton vibration rollerfor steady compaction.

Keywords： sand embankment     compaction in large thickness     numerical simulation     small size vibratory roller     steadycompaction    

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Theory and application of construction simulation for roller compaction of high core rock-fill dam

Zhong Denghua,Zhao Chensheng,Zhang Ping

Strategic Study of CAE 2011, Volume 13, Issue 12,   Pages 28-32

Abstract:

Based on the overall analysis of roller compaction system of high corerock-fill dam, the theory of construction simulation for roller compaction is put forward and the simulationmodel is set up which can actually reflect the uncertainties of the rock-fill dam roller compaction

Keywords： high core rock-fill dam     roller compaction     construction simulation    

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Field investigation of intelligent compaction for hot mix asphalt resurfacing

Wei HU,Xiang SHU,Baoshan HUANG,Mark WOODS

Frontiers of Structural and Civil Engineering 2017, Volume 11, Issue 1,   Pages 47-55 doi: 10.1007/s11709-016-0362-x

Abstract:

Intelligent compaction (IC) is a relatively new technology for asphalt paving industry.established and the parameters derived from it were compared with univariate statistical parameters for the CompactionFurther analyses illustrated the effect of temperature on the CMV value and compaction uniformity.

Keywords： intelligent compaction     compaction meter value (CMV)     semivariogram     multivariate analysis    

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Experimental research on compaction characteristics of aeolian sand

YUAN Yuqing, WANG Xuancang, ZHOU Xin

Frontiers of Structural and Civil Engineering 2008, Volume 2, Issue 4,   Pages 359-365 doi: 10.1007/s11709-008-0053-3

Abstract: Unlike other road materials, aeolian sand has some compaction characteristics that are key factors in, vibrating compaction and field test.Then, from the laboratory compaction test results, a compaction curve similar to the horizontally-writtenMoreover, some field compaction tests were carried out.Its compaction degree reached 96%, meeting the current specifications.
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Vibratory behaviors of Jeffcott system on cylindrical roller bearings

Hao WU, Jianwen WANG, Qi AN

Frontiers of Mechanical Engineering 2009, Volume 4, Issue 3,   Pages 305-309 doi: 10.1007/s11465-009-0036-7

Abstract: A Jeffcott rotor system of cylindrical roller bearings is studied in detail.Its critical speed is calculated by a new calculation method with roller bearing stiffness and dampingThe influences of bearing parameters, such as the roller length, rotor mass, distance between the bearingsThe results show that with increasing roller length and radial load, the critical speed increases; and

Keywords： roller bearing     bearing-rotor system     design value     critical rotational speed    

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Temperature control of transfer roller’s bearing based on finite element analysis

Peng ZHANG, Yourong LI, Han XIAO

Frontiers of Mechanical Engineering 2009, Volume 4, Issue 2,   Pages 215-218 doi: 10.1007/s11465-009-0026-9

Abstract: preservation cover is installed on the main rolling line, the heat dissipation environment of the transfer rollerTo ensure the normal production, a reasonable working jet capacity of the roller neck is derived.First, a globe model of the transfer roller is built for finite element analysis.The analysis result of the sub-model shows that the temperature of the transfer roller bearing exceeds

Keywords： transfer roller bearing     finite element analysis     sub-model     temperature control    

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Finite element modeling of counter-roller spinning for large-sized aluminum alloy cylindrical parts

Dawei ZHANG, Fan LI, Shuaipeng LI, Shengdun ZHAO

Frontiers of Mechanical Engineering 2019, Volume 14, Issue 3,   Pages 351-357 doi: 10.1007/s11465-019-0528-z

Abstract: Counter-roller spinning (CRS), where the mandrel is replaced by rollers, is an effective means of manufacturingThe local fine mesh moving with the roller is one of highlights of the model.

Keywords： large-sized cylindrical part     counter-roller spinning     aluminum alloy     finite element method     distributed    

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Fuzzy cluster analysis of tapered roller bearing vibration

Liu Jinjun,Xia Xintao,Zhang Lihong

Strategic Study of CAE 2008, Volume 10, Issue 7,   Pages 112-117

Abstract: using the fuzzy cluster analysis of grey system theory to analysis the test data of type-30204 tapered rollerin the first group have big effect on the vibration ; this group is composed of the convexity of the roller, deviation of the roller diameter, etc.The parameters in the last group have the least effect on the vibration of the tapered roller bearingIt can be concluded in this paper that, most parameters of tapered roller bearing have big effect on

Keywords： tapered roller bearing     vibration     fuzzy cluster analysis    

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On the improvement design of dynamic characteristics for the roller follower of a variable-speed plate

Hui Ching FAN, Hong Sen YAN

Frontiers of Mechanical Engineering 2012, Volume 7, Issue 1,   Pages 5-15 doi: 10.1007/s11465-012-0310-y

Abstract: Then the motion characteristics between the plate cam and its roller follower are derived.

Keywords： cam mechanism     variable input speed     kinematic design     dynamic design     optimal design    

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Nonlinear dynamic behaviour of a cam mechanism with oscillating roller follower in presence of profile

Walha LASSAAD, Tounsi MOHAMED, Driss YASSINE, Chaari FAKHER, Fakhfakh TAHER, Haddar MOHAMED

Frontiers of Mechanical Engineering 2013, Volume 8, Issue 2,   Pages 127-136 doi: 10.1007/s11465-013-0254-x

Abstract:

In this paper we investigate the nonlinear dynamic behaviour of a cam mechanism with oscillating rollerThe first one is located between cam and first roller while the second is between second roller and the

Keywords： cam     nonlinear behaviour     oscillating roller follower     profile error    

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A study on fatigue damage of asphalt mixture under different compaction using 3D-microstructural characteristics

Jing HU, Pengfei LIU, Bernhard STEINAUER

Frontiers of Structural and Civil Engineering 2017, Volume 11, Issue 3,   Pages 329-337 doi: 10.1007/s11709-017-0407-9

Abstract: this paper is investigating the microstructural characteristics of asphalt mixture under different compactionparticles and air-voids were extracted using Digital Image Processing (DIP), so the relationship between compactioneffective indicator to quantize the complexity of aggregate particles and air-voids; suffering the same compaction

Keywords： asphalt mixture     microstructure     morphology     digital image processing     fatigue damage    

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Experimental study on compaction-induced anisotropic mechanical property of rockfill material

Xiangtao ZHANG, Yizhao GAO, Yuan WANG, Yu-zhen YU, Xun SUN

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 1,   Pages 109-123 doi: 10.1007/s11709-021-0693-0

Abstract: complicated, especially for triaxial tests, in which the major principal stress plane intersects with the compactioninvestigated, and the distribution characteristics of particle orientation in specimens prepared via different compactionFor high-density rockfill materials, a set of specimen preparation devices for inclined compaction planes

Keywords： rockfill     inclination of specimen preparation     anisotropy     mechanical property     mechanism    

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Road Roller Engineering Based on Chaotic Vibration Mechanics

Long Yunjia,Yang Yong,Wang Congling

Strategic Study of CAE 2000, Volume 2, Issue 9,   Pages 76-79

Abstract:

The vibration test, numerical simulation and compaction experiment of the chaotic vibratory rollersfor transform theoretical research of chaotic vibration mechanics into technology achievement in road roller

It is proved that the working efficiency of chaotic vibratory roller is 12.2% higher than thatOne type of heavy chaotic vibratory roller (14t) is used in highway development in west China.

Keywords： chaos     vibration     road roller engineering    

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Highly active and durable Pd-Cu catalysts for oxygen reduction in alkaline exchange membrane fuel cells

ROLLER, William E. MUSTAIN

Frontiers in Energy 2017, Volume 11, Issue 3,   Pages 299-309 doi: 10.1007/s11708-017-0495-1

Abstract: A Pd-Cu catalyst, with primary B2-type phase, supported by VulcanXC-7R carbon was synthesized via a solvothermal method. The catalysts were physically and electrochemically characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM) and both cyclic and linear sweep voltammetry using a rotating disk electrode (RDE). During the RDE testing, the half-wave potential of the Pd-Cu/Vulcan catalyst was 50 mV higher compared to that of commercial Pt/C catalyst for the oxygen reduction reaction (ORR) in alkaline media. The Pd-Cu/Vulcan exhibited a specific activity of 1.27 mA/cm and a mass activity of 0.59 A/mg at 0.9 V, which were 4 and 3 times greater than that of the commercial Pt/C catalyst, respectively. The Pd-Cu/Vulcan catalyst also showed higher alkaline exchange membrane fuel cell (AEMFC) performance, with operating power densities of 1100 MW/cm operating on H /O and 700 MW/cm operating on H /Air (CO -free), which were markedly higher than those of the commercial Pt/C. The Pd-Cu/Vulcan catalyst also exhibited high stability during a short-term, AEMFC durability test, with only around 11% performance loss after 30 hours of operation, an improvement over most AEMFCs reported in the literature to date.

Keywords： alkaline exchange membrane (AEM)     fuel cell     Pd-Cu     oxygen reduction     high performance     water    

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Title Author Date Type Operation

Intelligent compaction theory of high roller compacted concrete dam

Liu Donghai,Li Bingyang,Cui Bo

Journal Article

Numerical simulation of compaction parameters for sand-filled embankment using large thickness sand filling

Wentao WANG, Chongzhi TU, Rong LUO

Journal Article

Theory and application of construction simulation for roller compaction of high core rock-fill dam

Zhong Denghua,Zhao Chensheng,Zhang Ping

Journal Article

Field investigation of intelligent compaction for hot mix asphalt resurfacing

Wei HU,Xiang SHU,Baoshan HUANG,Mark WOODS

Journal Article

Experimental research on compaction characteristics of aeolian sand

YUAN Yuqing, WANG Xuancang, ZHOU Xin

Journal Article

Vibratory behaviors of Jeffcott system on cylindrical roller bearings

Hao WU, Jianwen WANG, Qi AN

Journal Article

Temperature control of transfer roller’s bearing based on finite element analysis

Peng ZHANG, Yourong LI, Han XIAO

Journal Article

Finite element modeling of counter-roller spinning for large-sized aluminum alloy cylindrical parts

Dawei ZHANG, Fan LI, Shuaipeng LI, Shengdun ZHAO

Journal Article

Fuzzy cluster analysis of tapered roller bearing vibration

Liu Jinjun,Xia Xintao,Zhang Lihong

Journal Article

On the improvement design of dynamic characteristics for the roller follower of a variable-speed plate

Hui Ching FAN, Hong Sen YAN

Journal Article

Nonlinear dynamic behaviour of a cam mechanism with oscillating roller follower in presence of profile

Walha LASSAAD, Tounsi MOHAMED, Driss YASSINE, Chaari FAKHER, Fakhfakh TAHER, Haddar MOHAMED

Journal Article

A study on fatigue damage of asphalt mixture under different compaction using 3D-microstructural characteristics

Jing HU, Pengfei LIU, Bernhard STEINAUER

Journal Article

Experimental study on compaction-induced anisotropic mechanical property of rockfill material

Xiangtao ZHANG, Yizhao GAO, Yuan WANG, Yu-zhen YU, Xun SUN

Journal Article

Road Roller Engineering Based on Chaotic Vibration Mechanics

Long Yunjia,Yang Yong,Wang Congling

Journal Article

Highly active and durable Pd-Cu catalysts for oxygen reduction in alkaline exchange membrane fuel cells

ROLLER, William E. MUSTAIN

Journal Article