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Development of an analytical model to estimate the churning losses in high-speed axial piston pumps

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 2, doi: 10.1007/s11465-021-0671-1

Abstract: The axial piston pumps in aerospace applications are often characterized by high-speed rotation to achieverotational speeds.The churning losses deserve much attention at the design stage of high-speed axial piston pumps, butThe calculated drag torque agrees well with the experimental data over a wide range of rotational speedsThe presented analytical model provides practical guidelines for reducing the churning losses in high-speed

Keywords： axial piston pump rotating parts high rotational speed churning losses drag torque

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the tensile properties of friction stir welded aluminum alloy joints based on axial force, traverse speed, and rotational speed

Biranchi PANDA,A. GARG,Zhang JIAN,Akbar HEIDARZADEH,Liang GAO

Frontiers of Mechanical Engineering 2016, Volume 11, Issue 3, Pages 289-298 doi: 10.1007/s11465-016-0393-y

Abstract: Existing literature indicates that tensile properties exhibit strong dependence on the rotational speedcompared with the high heat input condition.is employed to produce the functional relationships between tensile properties and the three inputs (rotationalspeed, traverse speed, and axial force) of the FSW process.A high UTS was achieved, including a rotational speed of 1050 r/min and traverse speed of 95 mm/min.

Keywords： tensile properties ultimate tensile strength tensile elongation friction stir welding tool rotationalspeed genetic programming welding speed

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Value and governance of high-speed railway

Xiaoyan LIN, Zehua ZHANG, Meng WANG

Frontiers of Engineering Management 2017, Volume 4, Issue 4, Pages 463-482 doi: 10.15302/J-FEM-2017054

Abstract: This paper considers multiple perspectives to explore the concept of high-speed railway (HSR), rationallyThis paper analyzes the governance potential of major countries in the high-speed railway value chainand studies the feasible ways and development strategies to enhance the high-speed railway governanceSecond, the high-speed railway standard output has become the core competitiveness that embodies high-speedThird, the global high-speed railway market presents a hierarchical high-speed railway governance model

Keywords： high-speed railway value communication value high-speed railway value governance governance path upgrade

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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: Its critical speed is calculated by a new calculation method with roller bearing stiffness and dampingare numerically studied, and the influences of an oil film and damping on the critical speed are alsoRegular curves of the relationship between the geometric parameters and the system critical speed areThe results show that with increasing roller length and radial load, the critical speed increases; andThis means that an oil film will decrease the critical rotational speed of the rotor system.

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

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CR-Fuxing high-speed EMU series

Frontiers of Engineering Management Pages 742-748 doi: 10.1007/s42524-023-0281-1

Abstract: CR-Fuxing high-speed EMU series

Keywords： CR-Fuxing series high-speed EMU innovation key system digitalized collaborative design engineering

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Exploration on Engineering Management Practice of China’s High Speed Railways

Yong-fu Sun

Frontiers of Engineering Management 2014, Volume 1, Issue 3, Pages 232-240 doi: 10.15302/J-FEM-2014043

Abstract: paper explores the principal motivations and successful experiences of the rapid development of China’s highspeed railway.Under the overall coordination of the government, a high speed railway technology system has been formedThe target control system and support-guarantee system were established for the high speed railway projectspeed railway.

Keywords： high speed railway engineering management practice innovation

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Comprehensive measurement and evaluation system of high-speed motorized spindle

Dashuai ZHOU, Liangsheng WU, Yichuan XIAO

Frontiers of Mechanical Engineering 2011, Volume 6, Issue 2, Pages 263-269 doi: 10.1007/s11465-011-0217-z

Abstract: The high-speed motorized spindle is the most critical part and becoming more widely used in the machinetool at present, and its precision may affect the overall performance of high-speed cutting.Most of the studies on high-speed cutting are focused on the cutting force, the vibration of the spindleof the spindle’s thermal deformations; hence, how to roundly measure and objectively evaluate high-speedThis paper presents a comprehensive measurement and evaluation system of high-speed motorized spindle

Keywords： high-speed motorized spindle comprehensive prope rties evaluation system

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Technical studies on high-speed turnouts for china railways

He Huawu

Strategic Study of CAE 2009, Volume 11, Issue 5, Pages 23-30

Abstract:

High-speed turnout serves as a vital part of track structure for high-speedIn this paper, design parameters and linear plane of high-speed turnout, main structure characteristicsof components (including fastening, turnout sleeper, switching system etc.), design theories of high-speedwill offer remarkable guiding significance for the further R&D, test, verification and wide-use of high-speed

Keywords： high-speed railway high-speed turnout technical studies

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Interactive effects of high-speed rail on nodal zones in a city: exploratory study on China

Guo LIU, Kunhui YE

Frontiers of Engineering Management 2019, Volume 6, Issue 3, Pages 327-335 doi: 10.1007/s42524-019-0051-2

Abstract: The arrival of the high-speed rail (HSR) era has accelerated the pace of urban development, but its broad

Keywords： high-speed rail nodal zone interactive effects sustainable urbanization China

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Case modifying of high-speed cutting database based on CSP and similarity theory

Kejun XIANG, Zhanqiang LIU, Xing AI

Frontiers of Mechanical Engineering 2009, Volume 4, Issue 1, Pages 83-87 doi: 10.1007/s11465-009-0014-0

Abstract: By analyzing the reasoning of a high-speed cutting database system, a case modifying method is put forwardOn the basis of the high-speed cutting theory, a similarity calculation formula is deduced to calculatesimilarity calculation are applied to case modifying, which is possible to automatically modify cases in the high-speed

Keywords： high-speed cutting database case modifying CSP similarity calculation

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Being good or being known: International reputation of high-speed railway enterprises

Frontiers of Engineering Management Pages 455-466 doi: 10.1007/s42524-023-0250-8

Abstract: With fierce competition in the global high-speed railway (HSR) market, international reputation has become

Keywords： high-speed railway international reputation being good being known structural equation modeling

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Development progress of China’s 600 km/h high-speed magnetic levitation train

Frontiers of Engineering Management 2022, Volume 9, Issue 3, Pages 509-515 doi: 10.1007/s42524-022-0199-z

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Keywords： 600 km/h high-speed magnetic levitation train development history technological innovation

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Integrated slipper retainer mechanism to eliminate slipper wear in high-speed axial piston pumps

Frontiers of Mechanical Engineering doi: 10.1007/s11465-021-0657-z

Abstract: The power density of axial piston pumps can greatly benefit from increasing the speed level.axial piston pumps are exposed to continuous sliding on the swash plate, suffering from serious wear at highrotational speeds.Therefore, this paper presents a new integrated slipper retainer mechanism for high-speed axial pistonrotational speed up to 10000 r/min.

Keywords： axial piston pump high speed slipper wear slipper design retainer lubrication model