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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 usingThe modeling experiment shows that this method is feasible for analyzing the rabbet assembly structure

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

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Wear mechanism of disc-brake block material for new type of drilling rig

WANG Xinhua, WANG Simin, ZHANG Siwei, WANG Deguo

Frontiers of Mechanical Engineering 2008, Volume 3, Issue 1,   Pages 10-16 doi: 10.1007/s11465-008-0009-2

Abstract: To improve friction and wear performance and service life of the disc-brake pair material of a drillingrig, a new type of asbestos-free frictional material with better performance for disc-brake blocks isFracture and spalling traces as well as an overlapping structure of multilayer surface films can be easilyAt the beginning of wear, the hard peaks from the friction surface of the disc-brake plough on the surface

Keywords： asbestos-free frictional     Fracture     cyclization     friction     disc-brake    

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Analysis of load and adaptability of disc cutters during shield tunneling in soft–hard varied strata

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 4,   Pages 533-545 doi: 10.1007/s11709-023-0946-1

Abstract: The disc cutters of shield machines exhibit unsatisfactory adaptability and performance during the soft–hardTo analyze the rotation state, cutting performance, and adaptability of disc cutters during shield tunnelingAdditionally, the parameters of the models are modified based on laboratory disc cutter excavation testThe results of numerical calculation can reflect the load level and the behavior of the disc cuttersThe disc cutters in the center of the cutterhead should be specified with a lower starting torque to

Keywords： shield tunneling     disc cutter load     laboratory excavation test     numerical calculation     soft–hard varied    

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Field and laboratory experimental studies on hard-rock tunnel excavation based on disc cutter coupled

Frontiers of Structural and Civil Engineering   Pages 1370-1386 doi: 10.1007/s11709-023-0947-0

Abstract: The tunnel boring machine (TBM) is typically used in hard-rock tunnel excavation. Owing to the unsatisfactory adaptability of TBM to the surrounding rock, when crossing high-strength and high-wear strata, the TBM can easily cause defects, such as abnormal wear on cutters and overload damage to bearings, thus affecting the construction efficiency and cost. Therefore, high-pressure waterjet technology should be applied to assist in rock breaking for efficient TBM tunneling. In this study, the effects of water pressure, nozzle diameter, and nozzle speed on cutting are investigated via laboratory experiments of cutting hard rock using high-pressure waterjets. The penetration performance of the TBM under different water pressures is investigated via a field industrial penetration test. The results show that high-pressure waterjets are highly efficient for rock breaking and are suitable for industrial applications, as they can accommodate the advancing speed of the TBM and achieve high-efficiency rock breaking. However, during the operation of high-pressure waterjets, the ambient temperature and waterjet temperature in the tunnel increase significantly, which weakens the cooling effect of the cutterhead and decreases the construction efficiency of the TBM. Therefore, temperature control and cooling measures for high-pressure waterjets during their long-term operation must be identified. This study provides a useful reference for the design and construction of high-pressure water-jet-assisted cutterheads for breaking road headers.

Keywords： tunnel boring machine     hard-rock cutting     free face     disc cutter     rock-cutting efficiency    

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Effects of inclination angles of disc cutter on machining quality of Nomex honeycomb core in ultrasonic

Yidan WANG, Renke KANG, Yan QIN, Qian MENG, Zhigang DONG

Frontiers of Mechanical Engineering 2021, Volume 16, Issue 2,   Pages 285-297 doi: 10.1007/s11465-021-0631-9

Abstract: Ultrasonic cutting with a disc cutter is an advanced machining method for the high-quality processingHowever, in existing research, the effect of the disc cutter orientation on the machining quality hasnot been studied in depth, and practical guidance for the use of disc cutters is lacking.In this work, the inclined ultrasonic cutting process with a disc cutter was analyzed, and cutting experimentsThis study investigates the influence of the inclination angles of a disc cutter on the machining quality

Keywords： Nomex honeycomb core     disc cutter     inclined ultrasonic cutting     machining quality    

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Performance of landfill leachate treatment system with disc-tube reverse osmosis units

WANG Baozhen, LIU Shuo, LIU Yanping, LI Xiujin

Frontiers of Environmental Science & Engineering 2008, Volume 2, Issue 1,   Pages 24-31 doi: 10.1007/s11783-008-0024-x

Abstract: Reverse osmosis system with the disc-tube module (DT-RO) was applied to treat landfill leachate on full

Keywords： chemical cleaning     product     organic     nitrogen     Effective    

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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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Best operating conditions to produce hydroxyapatite nanoparticles by means of a spinning disc reactor

A. F. D’ Intino,B. de Caprariis,M.L. Santarelli,N. Verdone,A. Chianese

Frontiers of Chemical Science and Engineering 2014, Volume 8, Issue 2,   Pages 156-160 doi: 10.1007/s11705-014-1427-9

Abstract: hydroxyapatite (Mg-HAP) nanoparticles were produced by a reaction-precipitation process by using a spinning discIn particular, they were 51 nm in average size when the two reagents were fed over the disc symmetricallyat 3 cm from the disc center and a rotational speed of the disc reactor equal to 1400 r/min was adopted

Keywords： hydroxyapatite     nanoparticles     spinning disc reactor    

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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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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 speedand the crack is deemed to be open and close continuously in a trigonometric function way with the bladeindicator (NDI) is introduced to characterize the nonlinearity caused by blade crack.

Keywords： rotating blade     breathing crack     nonlinear vibration     nonlinear damage indicator    

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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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Adenovirus-mediated tissue inhibitor of metalloproteinase-3 gene transfection inhibits rabbit intervertebral disc

Xudong YU MM, Zengwu SHAO MD, Liming XIONG MD, Weiwei XU MM, Hezhong WANG MM, Huifa XU MM,

Frontiers of Medicine 2009, Volume 3, Issue 4,   Pages 415-420 doi: 10.1007/s11684-009-0072-z

Abstract: carrying tissue inhibitor of metalloproteinase-3 (RAdTIMP-3) against degeneration of rabbit intervertebral discMild or moderate rabbit lumbar disc degeneration model was constructed with the controllable axial loadingSafranin O-Fast green staining and type II collagen staining demonstrated better reserved integrity of discRAdTIMP-3 can effectively protect the matrix of rabbit intervertebral disc against overloading-induceddegeneration in a dose-dependent manner, resulting in the alleviation of disc degeneration.

Keywords： tissue inhibitor of metalloproteinase-3     intervertebral disc     rabbit     gene therapy    

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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

Vibration analysis of blade-disc coupled structure of compressor

WANG Chunjie, SONG Shunguang, ZONG Xiao

Journal Article

Wear mechanism of disc-brake block material for new type of drilling rig

WANG Xinhua, WANG Simin, ZHANG Siwei, WANG Deguo

Journal Article

Analysis of load and adaptability of disc cutters during shield tunneling in soft–hard varied strata

Journal Article

Field and laboratory experimental studies on hard-rock tunnel excavation based on disc cutter coupled

Journal Article

Effects of inclination angles of disc cutter on machining quality of Nomex honeycomb core in ultrasonic

Yidan WANG, Renke KANG, Yan QIN, Qian MENG, Zhigang DONG

Journal Article

Performance of landfill leachate treatment system with disc-tube reverse osmosis units

WANG Baozhen, LIU Shuo, LIU Yanping, LI Xiujin

Journal Article

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

Journal Article

Best operating conditions to produce hydroxyapatite nanoparticles by means of a spinning disc reactor

A. F. D’ Intino,B. de Caprariis,M.L. Santarelli,N. Verdone,A. Chianese

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

Nonlinear dynamic behavior of rotating blade with breathing crack

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

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

Adenovirus-mediated tissue inhibitor of metalloproteinase-3 gene transfection inhibits rabbit intervertebral disc

Xudong YU MM, Zengwu SHAO MD, Liming XIONG MD, Weiwei XU MM, Hezhong WANG MM, Huifa XU MM,

Journal Article

Mobile platform for hydraulic turbine blade repair robot

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

Journal Article