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International Journal of Mining Science and Technology 2022年第3期32卷 487-497页

作者： Longjun Dong Qing Tao qingchun hu Sijia Deng Yongchao Chen Qiaomu Luo Xihong Zhang School of Resources and Safety Engineering Central South UniversityChangsha 410083China School of Civil and Mechanical Engineering Curtin UniversityPerth 6102Australia

Acoustic emission(AE)localization plays an important role in the prediction and control of potential hazardous sources in complex ***,existing location methods have less discussion on the presence of unknown empty *** paper proposes an AE source location method for structures containing unknown empty areas(SUEA).Firstly,this method identifies the shape,size,and location of empty areas in the unknown region by exciting the active AE sources and using the collected AE ***,the unknown AE source can be located considering the identified empty *** lead break experiments were performed to verify the effectiveness and accuracy of the proposed *** specimens were selected containing empty areas with different positions,shapes,and *** show the average location accuracy of the SUEA increased by 78%compared to the results of the existing *** can provide a more accurate solution for locating AE sources in complex structures containing unknown empty areas such as tunnels,bridges,railroads,and caves in practical engineering.

关键词： Acoustic emission Source location Empty area identification

Simulation Analysis on Quasistatic Characteristics of Multistage Face Gears with Double Crown Surfac

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Computer Modeling in Engineering & Sciences 2019年第2期118卷 447-470页

作者： Xingbin Chen qingchun hu Zhongyang Xu Yao Ding Qianli Mai Chune Zhu School of Mechanical and Automotive engineering South China University of TechnologyGuangzhou510641China eBizprise Technology(TJ)Limited Tianjin300040China Institute for Biomedical and Pharmaceutical Sciences Guangdong University of TechnologyGuangzhou510006China.

The multistage face gears are the core component of the planetary gear train,which is symmetrically meshed by multiple single-stage face gear and multiple cylindrical ***,it is difficult to synchronize the contact between face gears and cylindrical gear due to the tooth number ***,the interference problems between two stages and big stress concentration are *** crown surface configuration technology and structure design were introduced to optimize the meshing *** improve the double crown design feasibility and meshing stability,it is necessary to establish a reasonable multistage face gears pair simulation model to evaluate various influence factors on the contact condition and quasi-static characteristics of multistage face gears *** relevant scatter plots are fitted by comparing the contact results with different crown quantities and friction coefficients to intuitively obtain the variation regularity of maximum deformation,maximum strain,maximum stress and maximum strain *** natural frequency and mode coefficient are also determined by modal analysis under these two *** the above mentioned studies verified the contact conjugate properties of double crown surface configuration were *** results can provide a foundation for structure optimization and transmission reliability of multistage face gears.

关键词： Multistage face gears quasi-static contact characteristics modal characteristics double crown surface simulation analysis.

Velocity-Free MS/AE Source Location Method for Three-Dimensional Hole-Containing Structures

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Engineering 2020年第7期6卷 827-834页

作者： Longjun Dong qingchun hu Xiaojie Tong Youfang Liu School of Resources and Safety Engineering Central South UniversityChangsha 410083China Department of Geophysics Colorado School of MinesGoldenCO 80401USA

Microseismic/acoustic emission(MS/AE)source localization method is crucial for predicting and controlling of potentially dangerous sources of complex ***,the locating errors induced by both the irregular structure and pre-measured velocity are poorly understood in existing *** meet the high-accuracy locating requirements in complex three-dimensional hole-containing structures,a velocity-free MS/AE source location method is developed in this *** avoids manual repetitive training by using equidistant grid points to search the path,which introduces A*search algorithm and uses grid points to accommodate complex structures with irregular *** also takes advantage of the velocity-free source location *** verify the validity of the proposed method,lead-breaking tests were performed on a cubic concrete test specimen with a size of 10 cm10 cm10 *** was cut out into a cylindrical empty space with a size of/6cm10 *** on the arrivals,the classical Geiger method and the proposed method are used to locate lead-breaking *** show that the locating error of the proposed method is 1.20 cm,which is less than 2.02 cm of the Geiger ***,the proposed method can effectively locate sources in the complex three-dimensional structure with holes and achieve higher precision requirements.

关键词： Microseismic source Acoustic emission Velocity-free location method Three-dimensional hole-containing structures

A Novel Model for Describing Rail Weld Irregularities and Predicting Wheel-Rail Forces Using a Machine Learning Approach

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Computer Modeling in Engineering & Sciences 2025年第1期142卷 555-577页

作者： Linlin Sun Zihui Wang Shukun Cui Ziquan Yan Weiping hu qingchun Meng State Key Laboratory of High-Speed Railway Track System China Academy of Railway Sciences Corporation LimitedBeijing100081China Railway Engineering Research Institute China Academy of Railway Sciences Corporation LimitedBeijing100081China School of Aeronautic Science and Engineering Beihang UniversityBeijing100191China

Rail weld irregularities are one of the primary excitation sources for vehicle-track interaction dynamics in modern high-speed *** can cause significant wheel-rail dynamic interactions,leading to wheel-rail noise,component damage,and *** researchers have employed the vehicle-track interaction dynamic model to study the dynamic interactions between wheel and rail induced by rail weld geometry ***,the cosine wave model used to simulate rail weld irregularities mainly focuses on the maximum value and neglects the geometric *** this study,novel theoretical models were developed for three categories of rail weld irregularities,based on measurements of the high-speed railway from Beijing to *** vertical dynamic forces in the time and frequency domains were compared under different running *** forces generated by the rail weld irregularities that were measured and modeled,respectively,were compared to validate the accuracy of the proposed ***,based on the numerical study,the impact force due to rail weld irrregularity is modeled using an Artificial Neural Network(ANN),and the optimum combination of parameters for this model is *** results showed that the proposed model provided a more accurate wheel/rail dynamic evaluation caused by rail weld irregularities than that established in the *** ANN model used in this paper can effectively predict the impact force due to rail weld irrregularity while reducing the computation time.

关键词： Rail weld irregularity high-speed railway vehicle-track coupled dynamics wheel/rail dynamic vertical force artificial neural networks

Analysis of Dynamic Response of Explosive Disposal Robot to Rough Road Excitation

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武汉理工大学学报 2006年第S2期28卷 513-516页

作者： MO Haijun huANG Ping hu qingchun DUAN Fuhai (College of Mechanical Engineering,South China University of Technology,Guangzhou 510640,China College of Mechanical Engineering South China University of TechnologyGuangzhou 510640China

When the explosive disposal robot traveling over a rough road,it will shake up and down,and generates dynamic ***,the jolt of the explosive disposal robot will result in oscillation and large inertia forces of the explosive,and will effect the stability of the grasped explosive,even cause the explosive slipping from the claw and falling to the ground,which seriously threats the saJety of the robot and around environment.A tracked explosive dispasal robot has been developed at South Chi- na University of *** paper takes the explosive disposal robot and the grasped explosive as study *** fo- cuses on the response analysis of the grasped explosive when the robot traveling over a rough *** the vibration character- istic of the explosive and the effects of the robot moving speeds on the stability of the *** dynamic response of the explosive is obtained by simulation,the results show that the velocity of the robot is a sensitivity influence factor on the oscillation of grasped explosive.

关键词： explosive disposal robot explosive rough road dynamic response

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复杂行星齿轮系运动学分析及效率计算

中国机械工程 2006年第20期17卷 2125-2129页

作者：胡青春段福海莫海军华南理工大学广州510640

针对现有的行星齿轮系运动学分析和效率估算方法存在计算复杂的问题,提出了一种图形解析法。该方法在齿轮传动结构的基础上对复杂行星齿轮系进行基本单元划分,推导出基本运动单元的普遍角速度和转矩方程以及效率表达式,基于角速度和转... 详细信息

针对现有的行星齿轮系运动学分析和效率估算方法存在计算复杂的问题,提出了一种图形解析法。该方法在齿轮传动结构的基础上对复杂行星齿轮系进行基本单元划分,推导出基本运动单元的普遍角速度和转矩方程以及效率表达式,基于角速度和转矩方程系数的特点,建立角速度和转矩方程的系数矩阵与解析图形数据的对应关系。应用该方法可方便、快速地求解复杂行星齿轮系的运动学参量及效率。

关键词：行星齿轮图形解析运动学分析效率

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钢/塑齿轮组合行星传动的振动特性

机械工程学报 2010年第1期46卷 62-67页

作者：段福海胡青春谢存禧福建工程学院机电及自动化工程系福州350108 华南理工大学机械与汽车工程学院广州510640

为了深入了解钢质行星齿轮传动系统引入塑料齿轮后的振动特性,建立钢/塑齿轮组合行星传动的动力学分析模型和试验模型,对SNS、SSS、SSN和NSS四种钢/塑齿轮组合行星传动的振动特性进行理论分析与试验研究,分析组合方式对行星传动振动特... 详细信息

为了深入了解钢质行星齿轮传动系统引入塑料齿轮后的振动特性,建立钢/塑齿轮组合行星传动的动力学分析模型和试验模型,对SNS、SSS、SSN和NSS四种钢/塑齿轮组合行星传动的振动特性进行理论分析与试验研究,分析组合方式对行星传动振动特性的影响。数值仿真与试验研究结果表明:塑料齿轮的引入对行星齿轮传动的振动特性影响很大,显著地减小了太阳轮与行星轮和内齿圈与行星轮的啮合动载荷;有效地抑制了行星齿轮传动的齿轮啮合频带振动和高频带振动;组合方式对行星齿轮传动的振动特性影响显著,合理地采用钢/塑齿轮组合行星传动结构可以极大地降低啮合动载荷,从而有效地抑制传动系统的振动和噪声。

关键词：塑料齿轮行星齿轮传动振动特性组合方式

带有圆锥齿轮的复合行星传动功率流与传动效率分析

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机械工程学报 2015年第21期51卷 42-48页

作者：胡青春李剑英段福海华南理工大学机械与汽车工程学院广州510640

对带有圆锥齿轮的复合行星传动进行运动分析,在此基础上采用虚功率理论分析该复合行星传动在不考虑啮合功率损失和考虑啮合功率损失时的功率流,在定义速比与转矩比的情况下,获得复合行星传动效率表达式,进一步研究速比、转矩比和啮合功... 详细信息

对带有圆锥齿轮的复合行星传动进行运动分析,在此基础上采用虚功率理论分析该复合行星传动在不考虑啮合功率损失和考虑啮合功率损失时的功率流,在定义速比与转矩比的情况下,获得复合行星传动效率表达式,进一步研究速比、转矩比和啮合功率损失系数及几何参数比对复合行星传动效率的影响规律,并开展相关试验验证。理论分析表明:在复合行星传动啮合功率损失系数和几何参数比被确定的情况下,复合行星传动效率随着转矩比的增大而增大,但随着速比的增大呈先减小后增大趋势;在复合行星传动速比和转矩比及几何参数比被确定的情况下,各齿轮副的啮合功率损失系数对复合行星传动效率的影响存在差异;在复合行星传动速比和转矩比及各齿轮副的啮合功率损失系数被确定的情况下,复合行星传动效率随着几何参数比的增大而增大。传动效率试验表明:选用高精度等级的锥齿轮、增大复合行星传动机构的转矩比及其行星轮的节圆半径可提高复合行星传动机构的传动效率。

关键词：虚功率理论转矩比啮合功率损失传动效率

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钢/塑料齿轮组合行星传动的固有特性分析

中国机械工程 2008年第20期19卷 2423-2427页

作者：段福海胡青春谢存禧华南理工大学广州510640

建立了钢/塑料齿轮组合行星传动的纯扭转动力学模型;对8种钢/塑料齿轮组合行星传动的固有特性进行了研究,分析了组合方式对行星传动结构的固有频率、振型及模态动能的影响;研究了温度对组合行星传动一阶固有频率的影响。研究结果表明:... 详细信息

建立了钢/塑料齿轮组合行星传动的纯扭转动力学模型;对8种钢/塑料齿轮组合行星传动的固有特性进行了研究,分析了组合方式对行星传动结构的固有频率、振型及模态动能的影响;研究了温度对组合行星传动一阶固有频率的影响。研究结果表明:组合方式对行星齿轮传动结构的固有特性影响显著;随着温度的升高,钢/塑料齿轮组合行星传动的固有频率下降,可能会出现温共振现象。

关键词：塑料齿轮行星传动固有特性模态分析温共振

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含填充胶表贴式高速永磁转子保护套强度研究

机床与液压 2021年第17期49卷 151-156页

作者：魏小丰胡青春华南理工大学机械与汽车工程学院广东广州510640

含填充胶表贴式高速永磁电机转子,其永磁体为分块式,磁极间填充物为高性能结构胶。针对该类型转子的保护套进行强度研究,基于弹性力学理论推导保护套应力计算公式,使用有限元法对公式进行了验证;同时分析过盈量和转速对保护套强度的影... 详细信息

含填充胶表贴式高速永磁电机转子,其永磁体为分块式,磁极间填充物为高性能结构胶。针对该类型转子的保护套进行强度研究,基于弹性力学理论推导保护套应力计算公式,使用有限元法对公式进行了验证;同时分析过盈量和转速对保护套强度的影响。结果表明:含填充胶表贴式高速永磁电机转子保护套在额定转速下有足够的机械强度,可以满足使用要求。

关键词：表贴式永磁电机保护套强度分析填充胶