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Design and Experimental Research on a New Pipe Rupture Valve

HU Guo-liang, XU Bing, YANG Hua-yong, ZHANG Yi-ding

Frontiers of Mechanical Engineering 2006, Volume 1, Issue 1, Pages 26-32 doi: 10.1007/s11465-005-0009-4

Abstract:

A new pipe rupture valve for hydraulic elevator is designed.Mathematical models established for the hydraulic elevator system are used in numerical simulations onThe effects of different viscous damping diameters, inlet pressures of pipe rupture valve, and elevatorloads on the hydraulic elevator system s dynamic performance are analyzed.Experimental research is also carried out using a hydraulic elevator experiment rig.

Keywords： Mathematical designing requirement numerical hydraulic elevator EN81-2 standard

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Elevator Configuration Based on the Markov Network Queuing Model

Zong Qun,Cheng Yiju,Song Junyuan

Strategic Study of CAE 2003, Volume 5, Issue 10, Pages 69-72

Abstract:

The article applies the Markov network theory to build the elevator traffic model.Based on the model elevator configuration parameters of the serving stations are calculated, comparingMeanwhile the result shows the validity and feasibility of the method applied to elevator configuration

Keywords： Markov network queuing theory elevator traffic model optimizing elevator configuration

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Modeling and Analysis of Elevator System Based on Timed-Coloured Petri Net

Zong Qun,Dou Liqian,Cheng Yiju

Strategic Study of CAE 2004, Volume 6, Issue 12, Pages 51-55

Abstract:

In this paper, an elevator running model based on timed-coloured Petri net is proposed.The running of elevator is classified according to the model.The running of elevator is controlled by the command of controller.of controller is composed of the color aggregates which have a connection with the running states of elevatorIn the end, an example of the application of the model in single elevator system and the elevator group

Keywords： Petri net timed-coloured Petri net the model of elevator the running of elevator

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Multiobjective trajectory optimization of intelligent electro-hydraulic shovel

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 4, doi: 10.1007/s11465-022-0706-2

Abstract: consumption, execution time, and excavation volume as the objective functions is presented for the electro-hydraulic

Keywords： trajectory planning electro-hydraulic shovel cubic polynomial S-curve multiobjective optimization

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Effects of slip length and hydraulic diameter on hydraulic entrance length of microchannels with superhydrophobic

Wenchi GONG, Jun SHEN, Wei DAI, Zeng DENG, Xueqiang DONG, Maoqiong GONG

Frontiers in Energy 2020, Volume 14, Issue 1, Pages 127-138 doi: 10.1007/s11708-020-0661-8

Abstract: This paper investigated effects of slip length and hydraulic diameter on the hydraulic entrance lengthIt is found that superhydrophobic microchannels have a longer hydraulic entrance length than that ofThe dimensionless hydraulic entrance length slightly increases with the increasing slip length at approximatelyRe<10, and does not vary with the hydraulic diameter.

Keywords： laminar flow hydraulic entrance length super hydrophobic surface slip length hydraulic diameter

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Modelling the thresholds of nitrogen/phosphorus concentration and hydraulic retention time for bloom

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 10, doi: 10.1007/s11783-022-1564-1

Abstract:

● A new model for bloom control in open land scape water was constructed.

Keywords： Reclaimed water landscape Algal bloom Nitrogen and phosphorus Hydraulic retention time Threshold

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Hydromechanical model for hydraulic fractures using XFEM

Bo HE

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 1, Pages 240-249 doi: 10.1007/s11709-018-0490-6

Abstract: In this study, a hydromechanical model for fluid flow in fractured porous media is presented. We assume viscous fluids and the coupling equations are derived from the mass and momentum balance equations for saturated porous media. The fluid flow through discrete cracks will be modelled by the extended finite element method and an implicit time integration scheme. We also present a consistent linearization of the underlying non-linear discrete equations. They are solved by the Newton-Raphson iteration procedure in combination with a line search. Furthermore, the model is extended to includes crack propagation. Finally, examples are presented to demonstrate the versatility and efficiency of this two-scale hydromechanical model. The results suggest that the presence of the fracture in a deforming, porous media has great impact on the fluid flow and deformation patterns.

Keywords： multi-phase medium porous fracture multi-scale method

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Review of fluid and control technology of hydraulic wind turbines

Maolin CAI, Yixuan WANG, Zongxia JIAO, Yan SHI

Frontiers of Mechanical Engineering 2017, Volume 12, Issue 3, Pages 312-320 doi: 10.1007/s11465-017-0433-2

Abstract:

This study examines the development of the fluid and control technology of hydraulic wind turbinesThe current state of hydraulic wind turbines as a new technology is described, and its basic fluid modelFinally, the advantages of hydraulic wind turbines are enumerated.Hydraulic wind turbines are expected to become the main development direction of wind turbines.

Keywords： wind turbine hydraulic system fluid model control technology

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Simulation analysis of pressure regulation of hydraulic thrust system on a shield tunneling machine

Zhibin LIU, Haibo XIE, Huayong YANG

Frontiers of Mechanical Engineering 2011, Volume 6, Issue 3, Pages 377-382 doi: 10.1007/s11465-011-0226-y

Abstract:

Hydraulic thrust system is an important system in a shield tunneling machine.In this paper, a hydraulic thrust system is explained, and a corresponding simulation model is carried

Keywords： tunnel hydraulic thrust system pressure regulation simulation

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A novel high-temperature and high-pressure hydraulic pump based on mononeuron control

Linhui ZHAO, Xin FANG

Frontiers of Mechanical Engineering 2009, Volume 4, Issue 2, Pages 219-223 doi: 10.1007/s11465-009-0024-y

Abstract: Based on structures and characteristics of traditional hydraulic pumps, this paper proposes a novel high-temperatureand high-pressure hydraulic pump (HHHP) that can work under 150°C and 28 MPa to overcome problems of

Keywords： mononeuron PID control hydraulic pump pressure fluctuation

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Distributed monitoring and diagnosis system for hydraulic system of construction machinery

Xiaohu CHEN, Wenfeng WU, Hangong WANG, Yongtao ZHOU,

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 1, Pages 106-110 doi: 10.1007/s11465-009-0089-7

Abstract: This paper mainly presents a distributed monitoring and diagnosis system for the hydraulic system ofeffectively realize its function of real-time online condition monitoring and fault diagnosis for the hydraulic

Keywords： construction machinery hydraulic system distributed condition monitoring controller area net (CAN) field

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Passive convergence-permeable reactive barrier (PC-PRB): An effective configuration to enhance hydraulic

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 12, doi: 10.1007/s11783-022-1591-y

Abstract:

● A novel PRB configuration based on passive convergent flow effect was proposed.

Keywords： convergence-permeable reactive barrier (PC-PRB) Permeable reactive barrier configuration Numerical simulation Hydraulic

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Vehicle roll stability control with active roll-resistant electro-hydraulic suspension

Lijun XIAO, Ming WANG, Bangji ZHANG, Zhihua ZHONG

Frontiers of Mechanical Engineering 2020, Volume 15, Issue 1, Pages 43-54 doi: 10.1007/s11465-019-0547-9

Abstract: This study examines roll stability control for vehicles with an active roll-resistant electro-hydraulic

Keywords： electro-hydraulic suspension roll stability LQR experiment

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Tomographic diagnosis of defects in hydraulic concrete structure

ZHAO Mingjie, XU Xibin

Frontiers of Structural and Civil Engineering 2008, Volume 2, Issue 3, Pages 226-232 doi: 10.1007/s11709-008-0027-5

Abstract: The ultrasonic tomographic technology is applied to diagnose the defects in hydraulic concrete structure

Keywords： satisfactory processing orientation tomographic diagnosis orientation perpendicular

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Thermal-hydraulic performance of novel louvered fin using flat tube cross-flow heat exchanger

DONG Junqi, CHEN Jiangping, CHEN Zhijiu

Frontiers in Energy 2008, Volume 2, Issue 1, Pages 99-106 doi: 10.1007/s11708-008-0010-9

Abstract: Finally, the area optimization factor was used to evaluate the thermal hydraulic performance of the louvereddecrease of the fin space and fin length, and the fin space has more obvious effect on the thermal hydraulic

Keywords： obvious effect different thermal hydraulic constant tube-side Colburn