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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 rollerfollower in presence of defects.The 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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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: alternative solution to flexibly achieve kinematic and dynamic characteristics, and then decrease the followerThen the motion characteristics between the plate cam and its roller follower are derived.To analyze the residual vibration, a single degree of freedom dynamic model of the elastic cam-followerBased on the motion equation derived from the dynamic model, the residual vibration of the follower is

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

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Comparative study of oscillating flow characteristics of cryocooler regenerator at low temperatures

Yonglin JU , Qingqing SHEN ,

Frontiers in Energy 2009, Volume 3, Issue 1,   Pages 80-84 doi: 10.1007/s11708-009-0008-y

Abstract: experimental results and correlations on the friction factor of cryocooler regenerators operating at oscillatingFinally, a new oscillating flow correlation of regenerators, in terms of several non-dimensional parameters

Keywords： friction factor     regenerator     oscillating flow     high frequency    

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Design and analysis of linear oscillating motor for linear pump application-magnetic field, dynamics

Zongxia JIAO,Tianyi WANG,Liang YAN

Frontiers of Mechanical Engineering 2016, Volume 11, Issue 4,   Pages 351-362 doi: 10.1007/s11465-016-0407-9

Abstract:

A linear oscillating motor is an electromagnetic actuator that can achieve short-stroke reciprocatingbecause of the demand of high power density in a linear actuation system, the performance of linear oscillatingIn this paper, a general framework of linear oscillating motor design and optimization is addressed inAs a whole, this process offers complete guidance for high power density linear oscillating motors in

Keywords： linear oscillating motor     linear pump     magnetic field     motor optimization    

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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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Investigation of vortical flows over oscillating body using fast Lagrangian vortex method

Baoshan ZHU ,

Frontiers in Energy 2009, Volume 3, Issue 3,   Pages 297-306 doi: 10.1007/s11708-009-0010-4

Abstract: A computational method facilitating long-time and high-resolution unsteady vortical flows is developed with the advantages of the discrete vortex methods. Both the velocity and pressure distribution of the flow field are calculated by integral formulations in combination with a fast summation algorithm. The vorticity field is described by Lagrangian representation, which is well suited to the moving boundary. Viscosity diffusion of the vorticity is considered with the core spreading model corrected by an adaptive splitting and merging algorithm. The effectiveness of the present method is examined by comparing the numerical results of unsteady separated flows which pass a cylinder and a thin cambered blade undergoing rotational oscillations with available experimental results. Interesting results about vortex shedding patterns and lock-in characteristics are provided for the thin cambered blade.

Keywords： unsteady vortical flows     fast vortex method     vortex shedding     rotational oscillation     thin cambered blade    

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Numerical simulation and analysis of periodically oscillating pressure characteristics of inviscid flow

Yan GU, Yonglin JU

Frontiers in Energy 2012, Volume 6, Issue 1,   Pages 21-28 doi: 10.1007/s11708-012-0173-2

Abstract: dynamics (CFD) code combined with user defined function (UDF) in order to understand the periodically oscillating

Keywords： pressure fluctuation     rolling     floating production storage and offloading unit for liquefied natural gas (LNG-FPSO) offshore    

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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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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: for 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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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: text-align: justify;">In the paper, the concept and realization process of intelligent compaction for high rollerwas established and a real-time estimation method of compaction quality of the entire work area for rollerThe adaptive adjustment of the roller work parameters was achieved, with the speed, exciting force, theWhat's more, the research provides a new way for the construction quality control of roller compacted

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

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Finite-time leader-follower consensus of a discrete-time system via sliding mode control Research Article

Ruizhuo SONG, Shi XING, Zhen XU

Frontiers of Information Technology & Electronic Engineering 2022, Volume 23, Issue 7,   Pages 1057-1068 doi: 10.1631/FITEE.2100565

Abstract: In this study, we solve the problem of discrete-time second-order (MASs) under the constraints of external disturbances. First, a novel consensus scheme is designed using a novel theory. Our adaptive controller is designed using the traditional sliding mode reaching law, and its advantages are chatter reduction and invariance to disturbances. In addition, the stability is demonstrated by presenting a discrete Lyapunov function. Finally, simulation results are presented to prove the validity of our theoretical results.

Keywords： Finite-time     Leader-follower consensus     Adaptive sliding mode control     Multi-agent systems    

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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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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

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

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

Hui Ching FAN, Hong Sen YAN

Journal Article

Comparative study of oscillating flow characteristics of cryocooler regenerator at low temperatures

Yonglin JU , Qingqing SHEN ,

Journal Article

Design and analysis of linear oscillating motor for linear pump application-magnetic field, dynamics

Zongxia JIAO,Tianyi WANG,Liang YAN

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

Investigation of vortical flows over oscillating body using fast Lagrangian vortex method

Baoshan ZHU ,

Journal Article

Numerical simulation and analysis of periodically oscillating pressure characteristics of inviscid flow

Yan GU, Yonglin JU

Journal Article

Fuzzy cluster analysis of tapered roller bearing vibration

Liu Jinjun,Xia Xintao,Zhang Lihong

Journal Article

Road Roller Engineering Based on Chaotic Vibration Mechanics

Long Yunjia,Yang Yong,Wang Congling

Journal Article

Intelligent compaction theory of high roller compacted concrete dam

Liu Donghai,Li Bingyang,Cui Bo

Journal Article

Finite-time leader-follower consensus of a discrete-time system via sliding mode control

Ruizhuo SONG, Shi XING, Zhen XU

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

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

ROLLER, William E. MUSTAIN

Journal Article