Characteristic Analysis of the Stick-Slip Vibration of Gear Transmission System in High-speed Train by Li Fuzhong, Huang Guanhua, He Hongyun

“…In order to study the torsional vibration of gear transmission system under slippage in high-speed train.A parametric vibration model of the gear transmission system is developed when the time-varying stiffness and the transmission error are considered.The nonlinear characteristic of selfexcited torsional vibration caused by wheel-rail creepage is analyzed.Numerical simulation results show that the time-varying mesh stiffness of meshing teeth pairs is the main cause of harmonic vibration of gear transmission system,when the wheel-rail creepage is over the best value,the self-excited vibration occurred and gear transmission system have the phenomenon of limited cycle in the same time,the self-excited vibration has no effect on the change of main frequency of the gear transmission system,but the harmonic response become more obvious,cause a strong vibration on the gear transmission system.…”
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Research of the Meshing Drive Performance of New Arc Tooth Synchronous Belt based on RecurDyn by Guo Jianhua, Wei Lai, Cao Zhongliang, Jiang Hongyuan

“…The polygon effect of the synchronous belt and the internal excitation of the system caused by the meshing impact are the main reasons for the angular velocity fluctuation of the driven wheel. The research of the output speed of the driven wheel shows that the speed fluctuation is a periodic harmonic function.…”
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Influence of Speed and Load on Meshing Impact of Spiral Bevel Gear by Zhai Xiangyi, Yang Jianjun, Hu Xinfang, Zhang Hua

“…Firstly, the mathematic model of meshing impact of spiral bevel gear is established, and the force analysis of driven wheel is carried out. Then, the multi-body dynamics model of spiral bevel gear transmission system is established by using Adams software, and the variation law of meshing force and angular acceleration of driven wheel in the transmission process under different rotational speeds and loads is analyzed. …”
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SIMULATION AND EXPERIMENTAL RESEARCH OF ELECTRIC POWER STEERING SYSTEM BASED ON MULTI-BODY DYNAMICS by LI Cheng, LI Min, WANG AiGuo, CHENG Yu

“…Relationship between steering wheel input torque and EPS output torque were compared and analyzed under different conditions with and without assistance. …”
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Design， Modeling and Simulation of Pendulum Indexing Cam-planetary Gear Composite Mechanism by Wang Shilong, Ji Sanyou, Tong Liang

“…The contact point changes continuously with the rotation of the swinging rod， and the swinging arm rotates relative to the swinging rod to drive the planetary wheel connected thereto to swing. Finally， the intermittent movement of the center wheel is realized， that is， the indexing movement. …”
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Finite Element Analysis of the Dump Truck Driving Axle Housing based on ADAMS & ANSYS WORKBENCH Virtual Environment by Zhang Lijuan

“…To further shorten the product development cycle of dump truck driving axle housing and improve the production efficiency,a dump truck drivngaxle design method is presented based on the practical road test parameter and the ADAMS and AWB common used in finite element analysis,the law of the axle housing stress and strain conditions under the practical road test parameter is studied,and the influence law of the frequency of load and size of load on the axle housing life is analyzed.The results show that dump truck driven axle housing larger stress area concentrated on the right and left axle and wheel connection area,the dump truck driven axle fatigue life cycles and damage factor minimum are in axle housing wheel area,the influence of load amplitude changes on the life of the axle housing is small,the influence of load frequency change on the axle fatigue life.…”
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Research on Meshing Force of Harmonic Reducer based on No-load Backlash and Circumferential Meshing Stiffness by Ziying Wang, Qungui Du, Dongzhou Zheng, Yuhang Hu, Mengfei Liu, Longfeng Zhong

“…An analytical model based on no-load backlash and circumferential meshing stiffness is proposed to describe the meshing condition between flexible wheel and rigid wheel more accurately under load status. …”
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Theory of Tooth Profile of New Type of Movable Gear Drive Mechanism based on Cam Mechanism by Yang Yang, Sun Shoulin

“…The relationship among the number of movable teeth,the number of teeth of the shock wave and the number of teeth of the center wheel is deduced,and the feature that movable teeth should distribute uniformly is proved. …”
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Safety Calculation and Testing of Falling Protector based on Passive Technology by Han Yukun, Li Junmin, Zhang Yunzhen, Lü Guobin

“…Aiming at the design defects of other structural style falling protectors,the structural features and working principle of star wheel falling protector based on passive technology are analyzed. …”
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Strength Analysis of Planetary Gear Train of A New Shearer Cutting Unit by Zhao Lijuan, Qiao Meina, Lan Jinbao

“…Taking the planetary gear train in a new type of thin seam shearer cutting part as the research object,based on multi-body dynamics theory,the rigid-flexible coupled model of the shearer cutting part is established,and the dynamic simulation analysis is carried on,the stress and deformation of the planetary gear train parts are obtained.The structure improvement of the sun wheel and planet carrier is carried out,the maximum mesh stress on sun wheel tooth surface is decreased by423.26 MPa after improvement,the stress concentration phenomenon on planet carrier is basically eliminated,the fatigue life is improved to 8.302 2×107 times.The research methods provides a quantitative basis for the design of planetary gear train,reduces the development cost in the process of production,improves the benefit of enterprise.…”
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MESH STRESS AND FATIGUE LIFE STUDY OF WALKING MECHANISM OF SHEARER UNDER PRACTICAL WORKING CONDITIONS by CHEN HongYue, JIAO SiWei, ZHANG Kun, MAO Jun

“…Fatigue life of walking wheel and pin rows were calculated by using Stress Life module of n-code GlypWorks. …”
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Research on the Design and Construction Technology of Double Strand Chain Transmission of Escalator by Yao Zhenqun, Xie Chaoyang, Li Xueyong

“…According to the working conditions and performance requirements of the escalator，the design and calculation of the double strand chain transmission system are carried out，especially the calculation and verification of the size of the large and small chain wheel，and the structural design of the wheel is carried out. …”
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Effect of Different Polishing Systems on Surface Roughness of IPS Empress Ceramic Materials by Sara Abdulbasit Turki, Marwah Hussein Abdulsattar, Zahraa Nazar Alwahab

“… For evaluation and comparison of the effect of surface treatment (glazings, polishing with rubber wheel and diamond paste, and polishing with rubber wheel) on pressable porcelain (IPS Emax porcelain) surface roughness in comparison with non-treated surface. …”
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Performance Analysis of Prefabricated Steel-Spring Floating-Slab Track and Its Application to Urban Express Rail Transit by Xudong Huang, Ping Li, Xinwei Luo, Liang Ling, Abdulmumin Ahmed Shuaibu, Zhiping Zeng

“…As thickness increases, vertical displacement of the rail increases slightly, and lateral stability increases, thereby slightly improving the vehicle’s running stability. (3) When the intercity electric multiple-unit train travels along the prefabricated steel-spring floating-slab-track bed at different speeds, the wheel-axle lateral force, wheel-rail vertical force, the derailment coefficient, the wheel-weight reduction rate, and the lateral acceleration of the vehicle body are all less than the specified limits of Chinese code, thus fully meeting the safety requirements of train operation. (4) Appropriately increasing the vertical-support damping of the floating slab can improve the vehicle’s vertical dynamic performance, reduce the vertical displacement of the rail, and lower the vibration response of the floating slab. (5) Adding side-mounted vibration isolators at the joint of the floating slab could greatly improve the stability of the floating slab itself and appropriately reduce the vehicle’s vertical vibration response. …”
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Experimental Study on Key Influencing Factors of Rubber V-belt CVT Performance by Liao Zhongwen, Wang Hailin

“…The structure of the rubber belt CVT is simplified, and the influences of three key components, driving wheel limit spring, centrifugal fly hammer and slave wheel pressure torsion spring, on the performance of CVT are analyzed by using CVT experimental bench. …”
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Numerical analysis of the influence of liquid on propagation of a rolling contact fatigue crack by M. Olzak, J. Piechna Warsaw, P. Pyrzanowski

“…The method has been employed for the predicting of crack deformation in the course of wheel rolling…”
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RESEARCH ON MECHANICAL CHARACTERISTICS OF NEW MOBILE ROLLER BRACKET CONVEYOR by ZHANG DongSheng, HE JinLong, NI Xue

“…The results show that after the load is applied,the contact force of the conveyor wheel rail will change,but the weak position of the roller carriage conveyor will not be moved,and the abnormal variation in the Z-axis direction indicates the uncontrollability of the lateral load. …”
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Sphenoid sinus foreign body following airbag deployment in the United States: a case report by Birk J. Olson, Joseph B. Vella, Justin P. McCormick

“…This case report is intended to inform the public regarding the dangers of placing accessories on a steering wheel.…”
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Research on Transmission Error of Hypoid Gear based on Real Tooth Surface by Yimin Mo, Renjie Mo, Qiming Li, Jie Liu, Junjian Yang, Yecai Huang

“…Changing the installation error of the gear found that the influence of the shaft angle error，the small wheel installation distance error，the offset distance error and the large wheel installation distance error on the transmission error decreased in turn. …”
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Study on Contact Stress Distribution of Single Tooth Meshing Dangerous Area of Heavy Load Gear by Yao Jun

“…Therefore,by increasing of the drive wheel strength and using the positive displacement,it is useful for improving the reliability and service life of heavy equipment.…”
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