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| 1 | Mesh stiffness evaluation of an internal spur gear pair with tooth profile shift显示文摘Tooth profile shift will change the thickness of gear teeth and a part of geometrical parameters of a gear pair, thus influencing its mesh stiffness and consequently the dynamic performances. In this paper, an analytical mesh stiffness calculation model for an internal gear pair in mesh considering the tooth profile shift is developed based on the potential energy principle. Geometrical representations of the tooth profile shift are firstly derived, and then fitted into the analytical tooth stiffness model of gears. This model could supply a convenient way for mesh stiffness calculation of profile shifted spur gears. Then, simulation studies are conducted based on the developed model to demonstrate the effects of tooth profile shift coefficient on the tooth compliances and the mesh stiffness of the internal spur gear pair. The results show that tooth profile shift has an obvious influence on the mean value, amplitude variation and phase of the mesh stiffness, from which it can be predicted that the dynamic response of an internal gear transmission system will be affected by the tooth profile shift. | CHEN ZaiGang ZHAI WanMing SHAO YiMin WANG KaiYun | 2016 | Science China(Technological Sciences)2016，59，9： | 11 |
| 2 | Synthesis, Structure and H+/K+-ATPase Inhibitory Activity of Novel Triazolyl Substituted Tetrahydrobenzofuran Derivatives via One-pot Three-component Click Reaction显示文摘 | Hubiao Fang Lei Jin Nianyu Huang Junzhi Wang Kun Zou Zaigang Luo | 2013 | Chinese Journal of Chemistry2013，31，6： | 6 |
| 3 | Dynamic analysis of traction motor in a locomotive considering surface waviness on races of a motor bearing显示文摘The traction motor is the power source of the locomotive.If the surface waviness occurs on the races of the motor bearing,it will cause abnormal vibration and noise,accelerate fatigue and wear,and seriously affect the stability and safety of the traction power transmission.In this paper,an excitation model coupling the time-varying displacement and contact stiffness excitations is adopted to investigate the effect of the surface waviness of the motor bearing on the traction motor under the excitation from the locomotive-track coupled system.The detailed mechanical power transmission path and the internal/external excitations(e.g.,wheel–rail interaction,gear mesh,and internal interactions of the rolling bearing)of the locomotive are comprehensively considered to provide accurate dynamic loads for the traction motor.Effects of the wavenumber and amplitude of the surface waviness on the traction motor and its neighbor components of the locomotive are investigated.The results indicate that controlling the amplitude of the waviness and avoiding the wavenumber being an integer multiple of the number of the rollers are helpful for reducing the abnormal vibration and noise of the traction motor. | Yuqing Liu Zaigang Chen Wei Li Kaiyun Wang | 2021 | Railway Engineering Science2021，29，4： | 5 |
| 4 | Effect of the drive system on locomotive dynamic characteristics using different dynamics models显示文摘Based on the theory of vehicle-track coupled dynamics and gear system dynamics, a locomotive-track coupled spatial dynamics model is established by considering the dynamic effects of the gear transmission system. The vibration responses of a locomotive's major components are then simulated using three locomotive-track models, namely the proposed dynamics model with the gear transmissions, a locomotive-track coupled dynamics model that considers the traction motor, and the classical Zhai's model. The locomotive dynamic responses of the three models are extracted and compared to reveal discrepancies between them so as to explore the dynamic effects of the power transmission system and clarify potential applications of these models. The results indicate that the dynamic effects of the gear transmissions have a negligible influence on the lateral vibrations of the locomotive components. However, they have obvious effects on the vertical and longitudinal vibrations of the wheelset and the traction motor. Another advantage of the locomotive dynamics model that considers the dynamic effects of the gear transmissions is that the dynamic performance of the drive system can be assessed in the vehicle vibration environment. This study provides theoretical references that can assist researchers in choosing the most appropriate locomotive dynamics model according to their specific research purpose. | ZHANG Tao CHEN ZaiGang ZHAI WanMing WANG KaiYun WANG Hong | 2019 | Science China(Technological Sciences)2019，62，2： | 3 |
| 5 | Transient meshing performance of gears with different modification coefficients and helical angles using explicit dynamic FEA显示文摘 | Yumei Hu Yimin Shao Zaigang Chen Ming J. Zuo | 2010 | Mechanical Systems and Signal Processing2010，，5： | 2 |
| 6 | Surface wear evolution of traction motor bearings in vibration environment of a locomotive during operation显示文摘Wear is a major cause of bearing failure,however,compared with other impact failures,smooth wear is often neglected because of its slow gradualness.In a locomotive,under the effect of the intensified wheel-rail interaction and gear mesh,the surface wear can increase the radial clearances of motor bearings,trigger abnormal vibration and noise,and adversely affect the efficiency and safety of the traction motor.In this study,considering the mechanical structure of the traction motor,a locomotive-track spatially coupled dynamics model with traction power transmissions(LTMM)is adopted to provide accurate dynamic loads and obtain the dynamic responses of the system.From the perspective of contact stress and relative skidding at the roller-race interface,the causes and evolution of motor bearings surface wear are analyzed.The results indicate that the wear of inner races of motor bearings is uniform.The outer races of the driving/non-driving end bearings(DB or NDB)are worn in the loaded/main loadbearing regions.The increasing surface wear can increase the internal dynamic forces(e.g.,the centrifugal force of rotor and unbalanced magnetic pull)induced by the instantaneous eccentricity of the rotor,intensify the interactions between the roller and races,and deteriorate the vibrations of the traction motor and its neighboring components in the locomotive.In addition,the effects of the friction coefficient at the roller-race interface and track random irregularity are analyzed.This study offers a theoretical basis in service life prediction and design of the motor bearings. | LIU YuQing CHEN ZaiGang WANG KaiYun ZHAI WanMing | 2022 | Science China(Technological Sciences)2022，65，4： | 2 |
| 7 | Mesh stiffness calculation of a spur gear pair with tooth profile modification and tooth root crack显示文摘 | CHEN Zaigang SHAO Yimin | 2013 | Mechanism and Machine Theory2013，62，： | 1 |
| 8 | Mesh stiffness of a internal spur gear pair with ring gear rim deformation 显示文摘 | CHEN Zaigang SHAO Yimin | 2013 | Mechanism and Machine Theory2013，69，： | 1 |
| 9 | Dynamic simulation of planetary gear set with flexible spur ring gear显示文摘 | CHEN Zaigang SHAO Yimin SU Daizhong | 2013 | Journal of Sound and Vibration2013，332，26： | 1 |
| 10 | Transient meshing performance of gears with different modification coefficients and helical angles using explicit dynamic FEA显示文摘 | Yumei Hu Yimin Shao Zaigang Chen | 2011 | Mechanical Systems and Signal Processing2011，25，5： | 1 |
| 11 | Mesh stiffness calculation of a spurgear pair with tooth profile modification and tooth root crack显示文摘 | CHEN Zaigang SHAO Yimin | 2013 | Mechanism and Machine Theory2013，62，： | 1 |
| 12 | Transientmeshing performance of gears with different modification co-efficients and helical angles using explicit dynamic FEA 显示文摘 | HU Yumei SHAO Yimin CHEN Zaigang | 2011 | Mechanical System and Signal2011，25，5： | 1 |
| 13 | Quantitative detection of locomotive wheel polygonization under non-stationary conditions by adaptive chirp mode decomposition显示文摘Wheel polygonal wear is a common and severe defect,which seriously threatens the running safety and reliability of a railway vehicle especially a locomotive.Due to non-stationary running conditions(e.g.,traction and braking)of the locomotive,the passing frequencies of a polygonal wheel will exhibit time-varying behaviors,which makes it too difficult to effectively detect the wheel defect.Moreover,most existing methods only achieve qualitative fault diagnosis and they cannot accurately identify defect levels.To address these issues,this paper reports a novel quantitative method for fault detection of wheel polygonization under non-stationary conditions based on a recently proposed adaptive chirp mode decomposition(ACMD)approach.Firstly,a coarse-to-fine method based on the time–frequency ridge detection and ACMD is developed to accurately estimate a time-varying gear meshing frequency and thus obtain a wheel rotating frequency from a vibration acceleration signal of a motor.After the rotating frequency is obtained,signal resampling and order analysis techniques are applied to an acceleration signal of an axle box to identify harmonic orders related to polygonal wear.Finally,the ACMD is combined with an inertial algorithm to estimate polygonal wear amplitudes.Not only a dynamics simulation but a field test was carried out to show that the proposed method can effectively detect both harmonic orders and their amplitudes of the wheel polygonization under non-stationary conditions. | Shiqian Chen Kaiyun Wang Ziwei Zhou Yunfan Yang Zaigang Chen Wanming Zhai | 2022 | Railway Engineering Science2022，30，2： | 1 |
| 14 | Dynamic simulation of spur gear with tooth root crack propagating along tooth width and crack depth 显示文摘 | Zaigang Chen YiminShao | 2011 | Engineering Failure Analysis2011，，： | 1 |
| 15 | Dynamic simulation of spurgear with tooth root crack propagating along tooth width andcrack depth 显示文摘 | Chen Zaigang Shao Yimin | 2011 | Engineering Failure Analysis2011，18，： | 1 |
| 16 | Dynamic simulation of spur gear with tooth root crack propagating along tooth width and crack depth显示文摘 | Zaigang Chen Yimin Shao | 2011 | Engineering Failure Analysis2011，，8： | 1 |
| 17 | Dynamic Simulation of Spur Gear with Tooth Root Crack Propagating along Tooth Width and Crack Depth 显示文摘 | Chen Zaigang Shao Yimin | 2011 | Engineering Failure Analysis2011，18，8： | 1 |
| 18 | Mesh stiffness calculation of a spur gear pair with tooth profile modification and tooth root crack显示文摘 | CHEN Zaigang SHAO Yimin | 2013 | Mechanism and Machine Theory2013，62，： | 1 |
| 19 | Dynamic simulation of spur gear with tooth root crack propagating along tooth width and crack depth显示文摘 | CHEN Zaigang SHAO Yimin | 2011 | Engineering Failure Analysis2011，18，8： | 1 |
| 20 | Dynamic features of planetary gear set with tooth plasticinclination deformation due to tooth root crack显示文摘 | SHAO Yimin CHEN Zaigang | 2013 | Nonlinear Dynamics2013，74，4： | 1 |
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