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Assessment of Mechanical Characteristic for Reinforced Concrete Precast Arc Shaft Lining

Rong Chuanxin,Wang Xiuxi,Cheng Hua

Strategic Study of CAE 2005, Volume 7, Issue 7,   Pages 43-49

Abstract:

Assessment of mechanical characteristic for reinforced concrete precast arc shaft lining is achieved

Keywords： high strength reinforced concrete precast arc shaft lining     mechanical characteristic     finite element method    

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Analysis of the dynamic hysteresis characteristic of finger seal

LEI Yanni, CHEN Guoding

Frontiers of Mechanical Engineering 2007, Volume 2, Issue 1,   Pages 32-36 doi: 10.1007/s11465-007-0005-y

Abstract: The research about hysteresis characteristic of finger seal (FS), which was carried out based on theA mass spring damper dynamics model of FS system was proposed and the hysteresis characteristic of theThis work shows that the dynamics characteristic analysis of the FS is necessary and the dynamics model

Keywords： FS     necessary     hysteresis characteristic     optimization     spring    

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Flow characteristic and wastewater treatment performance of a pilot-scale airlift oxidation ditch

Hongtao PANG, Hanchang SHI, Huiming SHI,

Frontiers of Environmental Science & Engineering 2009, Volume 3, Issue 4,   Pages 470-476 doi: 10.1007/s11783-009-0143-z

Abstract: diffuser and baffle as aerator was operated in a wastewater treatment plant (WWTP) to investigate its flow characteristic

Keywords： airlift oxidation ditch     flow characteristic     wastewater treatment    

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Weak characteristic information extraction from early fault of wind turbine generator gearbox

Xiaoli XU, Xiuli LIU

Frontiers of Mechanical Engineering 2017, Volume 12, Issue 3,   Pages 357-366 doi: 10.1007/s11465-017-0423-4

Abstract:

Given the weak early degradation characteristic information during early fault evolution in gearboxA weak characteristic information extraction based on µ-SVD and local mean decompositionExperimental results show that this method can significantly weaken signal noise, effectively extract the weak characteristic

Keywords： wind turbine generator gearbox     µ-singular value decomposition     local mean decomposition     weak characteristic    

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A bionic approach for the mechanical and electrical decoupling of an MEMS capacitive sensor in ultralow

Frontiers of Mechanical Engineering 2023, Volume 18, Issue 2, doi: 10.1007/s11465-023-0747-1

Abstract: However, attention has been rarely given on the influences of external mechanical and internal electricalIn this work, a bionic swallow structure design norm was developed for mechanical decoupling, and theinfluences of structural parameters on mechanical behavior were fully analyzed and optimized.High immunity to mechanical disturbances was maintained simultaneously, i.e., less than 0.369% and 0.058%

Keywords： micro-electro-mechanical system capacitive sensor     bionics     operation instability     mechanical and electrical    

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Fractal characteristic evaluation and interpolation reconstruction for surface topography of drilled

Frontiers of Mechanical Engineering 2021, Volume 16, Issue 4,   Pages 840-854 doi: 10.1007/s11465-021-0643-5

Abstract: In this paper, an improved fractal interpolation model is proposed to reconstruct the surface topography of composite hole wall. This model adopts the maximum positive deviations and maximum negative deviations between the measured values and trend values to determine the contraction factors. Hole profiles in 24 directions are measured. Fractal parameters are calculated to evaluate the measured surface profiles. The maximum and minimum fractal dimension of the hole wall are 1.36 and 1.07, whereas the maximum and minimum fractal roughness are 4.05 × 10 −5 and 4.36 × 10 −10 m, respectively. Based on the two-dimensional evaluation results, three-dimensional surface topographies in five typical angles (0°, 45°, 90°, 135°, and 165°) are reconstructed using the improved model. Fractal parameter D s and statistical parameters Sa, Sq, and Sz are used to evaluate the reconstructed surfaces. Average error of D s, Sa, Sq, and Sz between the measured surfaces and the reconstructed surfaces are 1.53%, 3.60%, 5.60%, and 9.47%, respectively. Compared with the model in published literature, the proposed model has equal reconstruction effect in relatively smooth surface and is more advanced in relatively rough surface. Comparative results prove that the proposed model for calculating contraction factors is more reasonable.

Keywords： surface topography     fractal evaluation     fractal interpolation     reconstruction     composite    

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Operating characteristic analysis on the ultra-thin low temperature floor-heating system

Hualing ZHANG, Xiaopeng SONG

Frontiers of Structural and Civil Engineering 2013, Volume 7, Issue 2,   Pages 127-132 doi: 10.1007/s11709-013-0200-3

Abstract: However, there is a lack of operating characteristic research in this region, especially the energy consumption

Keywords： ultra-thin floor heating panel     the preheating time     thermal comfort     energy saving    

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Design and characteristic research of a novel electromechanical-hydraulic hybrid actuator with two transmission

Frontiers of Mechanical Engineering 2023, Volume 18, Issue 2, doi: 10.1007/s11465-022-0735-x

Abstract: Servo-hydraulic actuators (SHAs) are widely used in mechanical equipment to drive heavy-duty mechanisms

Keywords： electromechanical-hydraulic hybrid actuator (EMHA)     integration     transmission mechanisms     power assistance     energy efficiency     working characteristics    

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Mesh relationship modeling and dynamic characteristic analysis of external spur gears with gear wear

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 1,   Pages 9-9 doi: 10.1007/s11465-021-0665-z

Abstract: Gear wear is one of the most common gear failures, which changes the mesh relationship of normal gear. A new mesh relationship caused by gear wear affects meshing excitations, such as mesh stiffness and transmission error, and further increases vibration and noise level. This paper aims to establish the model of mesh relationship and reveal the vibration characteristics of external spur gears with gear wear. A geometric model for a new mesh relationship with gear wear is proposed, which is utilized to evaluate the influence of gear wear on mesh stiffness and unloaded static transmission error (USTE). Based on the mesh stiffness and USTE considering gear wear, a gear dynamic model is established, and the vibration characteristics of gear wear are numerically studied. Comparison with the experimental results verifies the proposed dynamic model based on the new mesh relationship. The numerical and experimental results indicate that gear wear does not change the structure of the spectrum, but it alters the amplitude of the meshing frequencies and their sidebands. Several condition indicators, such as root-mean-square, kurtosis, and first-order meshing frequency amplitude, can be regarded as important bases for judging gear wear state.

Keywords： gear wear     mesh relationship     mesh stiffness     transmission error     vibration characteristics    

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Determination of mechanical parameters for elements in meso-mechanical models of concrete

Xianglin GU, Junyu JIA, Zhuolin WANG, Li HONG, Feng LIN

Frontiers of Structural and Civil Engineering 2013, Volume 7, Issue 4,   Pages 391-401 doi: 10.1007/s11709-013-0225-7

Abstract: based on the discrete element method with the modified-rigid-body-spring concrete model, in which the mechanicalpredicted by the Carpinteri and Weibull size effects laws, a series of formulas to convert the macro-scale mechanical

Keywords： concrete     meso-mechanical model     discrete element method     size effect     mechanical parameter    

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Macro-architectured cellular materials: Properties, characteristic modes, and prediction methods

Zheng-Dong MA

Frontiers of Mechanical Engineering 2018, Volume 13, Issue 3,   Pages 442-459 doi: 10.1007/s11465-018-0488-8

Abstract: The characteristic modes and the stress recovery process used to predict the stress distribution inside

Keywords： architectured material     cellular materials     multi-scale modeling     homogenization method     effective material properties     computational method    

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Facile synthesis of polyaniline nanorods to simultaneously enhance the mechanical properties and wear

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 9,   Pages 1254-1266 doi: 10.1007/s11705-023-2297-3

Abstract: To enhance the mechanical properties and wear resistance of epoxy resin, polyaniline nanorods were firstthe phase structures and compositions of polyaniline nanorods, and their positive influences on the mechanical

Keywords： epoxy resin     polyaniline nanorods     mechanical property     tribological performance     wear mechanism    

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Gas dynamic characteristic of displacer in Stirling cryocoolers

LIU Xinguang, LIU Dongyu, WANG Yong, WU Yinong

Frontiers in Energy 2008, Volume 2, Issue 4,   Pages 499-503 doi: 10.1007/s11708-008-0090-6

Abstract: Based on the vector analysis of the dynamic characteristic of the displacer in split-type Stirling cryocoolers
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The Pendulum Characteristic of Natural Convection Gas and the Application for Sensor

Zhang Fuxue

Strategic Study of CAE 2002, Volume 4, Issue 8,   Pages 50-53

Abstract:

It is discovered that the natural convection gas has the pendulum characteristic, so the new concept

Keywords： gas pendulum characteristic     tilt sensor     accelerometer    

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Thermo-mechanical simulation of frost heave in saturated soils

Frontiers of Structural and Civil Engineering   Pages 1400-1412 doi: 10.1007/s11709-023-0990-x

Abstract: The study of frost heave requires conducting a multiphysics analysis, considering the thermal, mechanicalThis paper presents the use of a coupled thermo-mechanical approach to simulate frost heave in saturatedA function predicting porosity evolution is implemented to couple the thermal and mechanical field analysesThe results of the simulations indicate that the thermo-mechanical model captures various processes involved

Keywords： frost heave     multiphysics analysis     thermo-mechanical approach     saturated soils    

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Title Author Date Type Operation

Assessment of Mechanical Characteristic for Reinforced Concrete Precast Arc Shaft Lining

Rong Chuanxin,Wang Xiuxi,Cheng Hua

Journal Article

Analysis of the dynamic hysteresis characteristic of finger seal

LEI Yanni, CHEN Guoding

Journal Article

Flow characteristic and wastewater treatment performance of a pilot-scale airlift oxidation ditch

Hongtao PANG, Hanchang SHI, Huiming SHI,

Journal Article

Weak characteristic information extraction from early fault of wind turbine generator gearbox

Xiaoli XU, Xiuli LIU

Journal Article

A bionic approach for the mechanical and electrical decoupling of an MEMS capacitive sensor in ultralow

Journal Article

Fractal characteristic evaluation and interpolation reconstruction for surface topography of drilled

Journal Article

Operating characteristic analysis on the ultra-thin low temperature floor-heating system

Hualing ZHANG, Xiaopeng SONG

Journal Article

Design and characteristic research of a novel electromechanical-hydraulic hybrid actuator with two transmission

Journal Article

Mesh relationship modeling and dynamic characteristic analysis of external spur gears with gear wear

Journal Article

Determination of mechanical parameters for elements in meso-mechanical models of concrete

Xianglin GU, Junyu JIA, Zhuolin WANG, Li HONG, Feng LIN

Journal Article

Macro-architectured cellular materials: Properties, characteristic modes, and prediction methods

Zheng-Dong MA

Journal Article

Facile synthesis of polyaniline nanorods to simultaneously enhance the mechanical properties and wear

Journal Article

Gas dynamic characteristic of displacer in Stirling cryocoolers

LIU Xinguang, LIU Dongyu, WANG Yong, WU Yinong

Journal Article

The Pendulum Characteristic of Natural Convection Gas and the Application for Sensor

Zhang Fuxue

Journal Article

Thermo-mechanical simulation of frost heave in saturated soils

Journal Article