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Nonlinear dynamic behavior of rotating blade with breathing crack

Laihao YANG, Zhu MAO, Shuming WU, Xuefeng CHEN, Ruqiang YAN

Frontiers of Mechanical Engineering 2021, Volume 16, Issue 1,   Pages 196-220 doi: 10.1007/s11465-020-0609-z

Abstract: This study aims at investigating the nonlinear dynamic behavior of rotating blade with transverse crackA novel nonlinear rotating cracked blade model (NRCBM), which contains the spinning softening, centrifugalThe rotating blade is considered as a cantilever beam fixed on the rigid hub with high rotating speedThe dynamic behavior of rotating cracked blade is then investigated with NRCBM, and the nonlinear damage) is expected to heavily reduce the stiffness of rotating blade and apparently result in a lower resonant

Keywords： rotating blade     breathing crack     nonlinear vibration     nonlinear damage indicator    

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Vibration analysis of blade-disc coupled structure of compressor

WANG Chunjie, SONG Shunguang, ZONG Xiao

Frontiers in Energy 2008, Volume 2, Issue 3,   Pages 302-305 doi: 10.1007/s11708-008-0064-8

Abstract: While a 3D assembly model of blade-disc structure was established, a finite element model for calculatingthe vibration characteristics during blade-disc coupling was built by taking into consideration thecoupling action of contact stress between the blade and the disc.The vibration characteristics of the blade-disc coupling structure was calculated and analyzed using

Keywords： blade-disc coupling     assembly     experiment     vibration     blade-disc structure    

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New method of fault diagnosis of rotating machinery based on distance of information entropy

Houjun SU, Tielin SHI, Fei CHEN, Shuhong HUANG

Frontiers of Mechanical Engineering 2011, Volume 6, Issue 2,   Pages 249-253 doi: 10.1007/s11465-011-0124-3

Abstract: basic conception of information fusion and some fusion diagnosis methods commonly used nowadays in rotatinginformation fusion, a new quantitative feature index monitoring and diagnosing the vibration fault of rotating

Keywords： rotating machinery     information fusion     fault diagnosis     Information entropy     distance of the information    

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Imbalanced fault diagnosis of rotating machinery using autoencoder-based SuperGraph feature learning

Frontiers of Mechanical Engineering 2021, Volume 16, Issue 4,   Pages 829-839 doi: 10.1007/s11465-021-0652-4

Abstract: To address this problem, an imbalanced fault diagnosis of rotating machinery using autoencoder-basedperformed on the constructed SuperGraph to achieve imbalanced training dataset fault diagnosis for rotatingpractical experimental platform, and the results show that the proposed method can effectively achieve rotating

Keywords： imbalanced fault diagnosis     graph feature learning     rotating machinery     autoencoder    

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―Summary of investigations on rotating cavity at IDG, RWTH Aachen University

Dieter BOHN, Jing REN,

Frontiers in Energy 2009, Volume 3, Issue 4,   Pages 489-497 doi: 10.1007/s11708-009-0040-y

Abstract: Institute of Steam and Gas Turbines, RWTH Aachen University, to analyze the flow structure inside the rotatingBoth the experimental and numerical results show that the whole flow structure rotating slower than thecavity rotating speed.

Keywords： rotating cavity     buoyancy     unsteady flow    

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Design and realization of a remote monitoring and diagnosis and prediction system for large rotating

Shaohong WANG, Tao CHEN, Jianghong SUN

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 2,   Pages 165-170 doi: 10.1007/s11465-009-0090-1

Abstract: Traditional on-site fault diagnosis means cannot meet the needs of large rotating machinery for its performanceThe designed remote monitoring and diagnosis and prediction system for large rotating machinery integrates

Keywords： large rotating machinery     remote monitoring     fault diagnosis     prediction system    

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Full-field dynamic strain reconstruction of an aero-engine blade from limited displacement responses

Frontiers of Mechanical Engineering 2023, Volume 18, Issue 1, doi: 10.1007/s11465-022-0731-1

Abstract: Blade strain distribution and its change with time are crucial for reliability analysis and residuallife evaluation in blade vibration tests.This study proposes a method of full-field and real-time strain reconstruction of an aero-engine bladeA displacement-to-strain transformation matrix is derived on the basis of the blade mode shapes in theThe proposed method is validated on an aero-engine blade in numerical and experimental cases.

Keywords： aero-engine blade     displacement response     dynamic strain reconstruction     mode shape     strain gauge    

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Convective mass transfer from a horizontal rotating cylinder in a slot air jet flow

Hongting MA , Dandan MA , Na YANG ,

Frontiers in Energy 2009, Volume 3, Issue 3,   Pages 289-296 doi: 10.1007/s11708-009-0019-8

Abstract: The effects of air jet impinging on the mass transfer characteristics from a rotating spinning cylinder

Keywords： air jet impinging     rotating cylinder     critical point     mass transfer characteristics    

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Metallic wastewater treatment by sulfate reduction using anaerobic rotating biological contactor reactor

Mothe Gopi Kiran, Kannan Pakshirajan, Gopal Das

Frontiers of Environmental Science & Engineering 2018, Volume 12, Issue 4, doi: 10.1007/s11783-018-1073-4

Abstract:

An-RBC reactor is highly suited to treat metallic wastewater.

Metal removal is due to sulfide precipitation via sulfate reduction by SRB.

Cu(II) removal was the best among the different heavy metals.

Maximum metal removal is achieved at low metal loading condition.

Metal removal matched well with the solubility product values of respective metal sulfide salts.

Keywords： Factorial design analysis     sulfate reducing bacteria     multi-metal solution     heavy metal removal     anaerobic rotating    

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simulated flue gas using aqueous persulfate with activation of ferrous ethylenediaminetetraacetate in the rotating

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 4,   Pages 460-469 doi: 10.1007/s11705-022-2224-5

Abstract: In this study, a rotating packed bed (RPB) was employed as a gas–liquid absorption device to elevate

Keywords： rotating packed bed     Fe2+-EDTA     sulfate radical     hydroxyl radical     NO removal efficiency    

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New response surface model and its applications in aerodynamic optimization of axial compressor blade

LIU Xiaojia, NING Fangfei

Frontiers in Energy 2008, Volume 2, Issue 4,   Pages 541-549 doi: 10.1007/s11708-008-0077-3

Abstract: A parametric method for the axial compressor 2D blade profiles is proposed in which the blade geometriesare defined with the parameters commonly used for blade definition, which ensures that the geometricsignificance is clear and an unreasonable blade profile is not generated.Based on this model, a numerical aerodynamic optimization platform for the axial compressor 2D bladeprofiles is developed, by which aerodynamic optimization of two compressor blade profiles are presented

Keywords： definition     objective distribution     fitting precision     combination     numerical aerodynamic    

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Dynamic characteristics of a shrouded blade with impact and friction

Xumin GUO, Jin ZENG, Hui MA, Chenguang ZHAO, Lin QU, Bangchun WEN

Frontiers of Mechanical Engineering 2020, Volume 15, Issue 2,   Pages 209-226 doi: 10.1007/s11465-019-0566-6

Abstract: A simplified computational model of a twisted shrouded blade with impact and friction is established.In this model, the shrouded blade is simulated by a flexible Timoshenko beam with a tip-mass, and the

Keywords： twisted shrouded blade     dynamic analysis     impact     friction     separate–stick–slip motion    

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Postprocessor development for ultrasonic cutting of honeycomb core curved surface with a straight blade

Frontiers of Mechanical Engineering 2023, Volume 18, Issue 1, doi: 10.1007/s11465-022-0729-8

Abstract: When ultrasonically cutting honeycomb core curved parts, the tool face of the straight blade must beHowever, given that the straight blade is a nonstandard tool, the existing computer-aided manufacturingTo solve this problem, this paper proposed an algorithm for extracting a straight blade real-time toolthe spindle rotation algorithm was proposed for the tool edge orientation problem when the straight bladeThe model of the machine tool and the definition of the straight blade were conducted in the VERICUT

Keywords： honeycomb core     straight blade     ultrasonic cutting     tool pose     postprocessor    

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Numerical simulation of a new hollow stationary dehumidity blade in last stage of steam turbine

Youmin HOU, Danmei XIE, Wangfan LI, Xinggang YU, Yang SHI, Hanshi QIN

Frontiers in Energy 2011, Volume 5, Issue 3,   Pages 288-296 doi: 10.1007/s11708-011-0160-z

Abstract: As a result of adopting saturation steam and long blade, problems of water erosion of last stage bladediscrete phase model simulation results and experiment data, the efficiency of existing dehumidity bladeA new stationary dehumidity blade was designed to elevate the dehumidity efficiency: the efficiency in

Keywords： steam turbine     hollow stationary blade     dehumidity     numerical simulation    

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Mobile platform for hydraulic turbine blade repair robot

GUI Zhongcheng, CHEN Qiang, SUN Zhenguo, ZHANG Wenzeng, LIU Kang

Frontiers of Mechanical Engineering 2008, Volume 3, Issue 2,   Pages 164-169 doi: 10.1007/s11465-008-0035-0

Abstract: The wall-climbing mobile platform (MP) of a robot for repairing a hydraulic turbine blade onsite is developedThe platform adheres to the blade surface through the force provided by the ferromagnetic devices, anda certain gap exists between the magnetic devices and the blade’s surface.chassis, is developed to make the platform self-adapt to the complex curved surface of the turbine bladeautomatically adapt to complex spatial surfaces, which satisfy the requirements of a hydraulic turbine blade
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Title Author Date Type Operation

Nonlinear dynamic behavior of rotating blade with breathing crack

Laihao YANG, Zhu MAO, Shuming WU, Xuefeng CHEN, Ruqiang YAN

Journal Article

Vibration analysis of blade-disc coupled structure of compressor

WANG Chunjie, SONG Shunguang, ZONG Xiao

Journal Article

New method of fault diagnosis of rotating machinery based on distance of information entropy

Houjun SU, Tielin SHI, Fei CHEN, Shuhong HUANG

Journal Article

Imbalanced fault diagnosis of rotating machinery using autoencoder-based SuperGraph feature learning

Journal Article

―Summary of investigations on rotating cavity at IDG, RWTH Aachen University

Dieter BOHN, Jing REN,

Journal Article

Design and realization of a remote monitoring and diagnosis and prediction system for large rotating

Shaohong WANG, Tao CHEN, Jianghong SUN

Journal Article

Full-field dynamic strain reconstruction of an aero-engine blade from limited displacement responses

Journal Article

Convective mass transfer from a horizontal rotating cylinder in a slot air jet flow

Hongting MA , Dandan MA , Na YANG ,

Journal Article

Metallic wastewater treatment by sulfate reduction using anaerobic rotating biological contactor reactor

Mothe Gopi Kiran, Kannan Pakshirajan, Gopal Das

Journal Article

simulated flue gas using aqueous persulfate with activation of ferrous ethylenediaminetetraacetate in the rotating

Journal Article

New response surface model and its applications in aerodynamic optimization of axial compressor blade

LIU Xiaojia, NING Fangfei

Journal Article

Dynamic characteristics of a shrouded blade with impact and friction

Xumin GUO, Jin ZENG, Hui MA, Chenguang ZHAO, Lin QU, Bangchun WEN

Journal Article

Postprocessor development for ultrasonic cutting of honeycomb core curved surface with a straight blade

Journal Article

Numerical simulation of a new hollow stationary dehumidity blade in last stage of steam turbine

Youmin HOU, Danmei XIE, Wangfan LI, Xinggang YU, Yang SHI, Hanshi QIN

Journal Article

Mobile platform for hydraulic turbine blade repair robot

GUI Zhongcheng, CHEN Qiang, SUN Zhenguo, ZHANG Wenzeng, LIU Kang

Journal Article