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High-precision gyro-stabilized control of a gear-driven platform with a floating gear tension device
《机械工程前沿(英文)》 2021年 第16卷 第3期 页码 487-503 doi: 10.1007/s11465-021-0635-5
关键词: inertially stabilized platform floating gear tension device nonlinear friction disturbance compensation proportional multiple-integral observer
Laboratory experiment on using non-floating body to generate electrical energy from water waves
Arunachalam AMARKARTHIK, Srinivasan CHANDRASEKARAN, Karuppan SIVAKUMAR, Harender SINHMAR
《能源前沿(英文)》 2012年 第6卷 第4期 页码 361-365 doi: 10.1007/s11708-012-0210-1
关键词: ocean wave energy point absorbers heaving body non-floating object heave response ratio electrical energy generation
石照耀,费业泰,谢华锟
《中国工程科学》 2003年 第5卷 第9期 页码 13-17
全面概述了过去100年齿轮测量技术的发展历程,给出了6件标志性事情;着重论述了测量原理的演变、实现测量原理技术方式的发展以及测量结果的表述与利用;介绍了当今CNC齿轮测量中心的原理、组成和特点;结合90年代以来齿轮测量技术领域中几股新潮流,展望了未来齿轮测量技术的一些研究方向。
WANG Huailiang, SONG Yupu
《结构与土木工程前沿(英文)》 2008年 第2卷 第4期 页码 323-328 doi: 10.1007/s11709-008-0043-5
关键词: requirement wet-screened concrete compression-tension maximum aggregate principal
Gear fault diagnosis using gear meshing stiffness identified by gearbox housing vibration signals
《机械工程前沿(英文)》 2022年 第17卷 第4期 doi: 10.1007/s11465-022-0713-3
关键词: gearbox fault diagnosis meshing stiffness identification transfer path signal processing
Russian school of the theory and geometry of gearing: Its origin and golden period (1935 --1975)
Dmitry BABICHEV,Sergey LAGUTIN,Natalya BARMINA
《机械工程前沿(英文)》 2016年 第11卷 第1期 页码 44-59 doi: 10.1007/s11465-015-0360-z
During the second half of the twentieth century, Soviet scientists were among the world leaders in the theory and geometry of gearing or the theoretical fundamentals of designing gears and gear-cutting tools. The authors of the current paper review works related to the development of the theory of gearing (TG) written in Russian from the mid-1930s to the present. Overall, the review covers more than 400 publications of nearly 200 authors (among more than 1000 studied works). This review involves some works on gear strength and accuracy to attract more experts.
This paper presents a short list of works from the seventeenth century to the nineteenth century and discusses the basic concepts of the TG. This paper also includes a review of more than 160 papers in Russian for the period of 1935–1975, which is the “golden age” of the TG. The main features and achievements during this period are also considered.
The distinctive feature of this review is the use of diagrams that visually present TG experts and the dates and themes of their published works. The diagrams also show the following aspects: 1) The most popular and important themes in a specific period, 2) the most important publications on the themes of interest to readers, and 3) the direction of the works and scope of interests of every researcher.
关键词: theory of gearing (TG) gear geometry generating surface gear synthesis gear analysis
Seismic stability of earth slopes with tension crack
Yundong ZHOU, Fei ZHANG, Jingquan Wang, Yufeng GAO, Guangyu DAI
《结构与土木工程前沿(英文)》 2019年 第13卷 第4期 页码 950-964 doi: 10.1007/s11709-019-0529-3
关键词: slope stability tension crack limit equilibrium seismic effect
Surface tension of liquid metal: role, mechanism and application
Xi ZHAO, Shuo XU, Jing LIU
《能源前沿(英文)》 2017年 第11卷 第4期 页码 535-567 doi: 10.1007/s11708-017-0463-9
关键词: surface tension liquid metal soft machine printed electronics electrowetting self-actuation
Yun KONG, Tianyang WANG, Zheng LI, Fulei CHU
《机械工程前沿(英文)》 2017年 第12卷 第3期 页码 406-419 doi: 10.1007/s11465-017-0419-0
Planetary transmission plays a vital role in wind turbine drivetrains, and its fault diagnosis has been an important and challenging issue. Owing to the complicated and coupled vibration source, time-variant vibration transfer path, and heavy background noise masking effect, the vibration signal of planet gear in wind turbine gearboxes exhibits several unique characteristics: Complex frequency components, low signal-to-noise ratio, and weak fault feature. In this sense, the periodic impulsive components induced by a localized defect are hard to extract, and the fault detection of planet gear in wind turbines remains to be a challenging research work. Aiming to extract the fault feature of planet gear effectively, we propose a novel feature extraction method based on spectral kurtosis and time wavelet energy spectrum (SK-TWES) in the paper. Firstly, the spectral kurtosis (SK) and kurtogram of raw vibration signals are computed and exploited to select the optimal filtering parameter for the subsequent band-pass filtering. Then, the band-pass filtering is applied to extrude periodic transient impulses using the optimal frequency band in which the corresponding SK value is maximal. Finally, the time wavelet energy spectrum analysis is performed on the filtered signal, selecting Morlet wavelet as the mother wavelet which possesses a high similarity to the impulsive components. The experimental signals collected from the wind turbine gearbox test rig demonstrate that the proposed method is effective at the feature extraction and fault diagnosis for the planet gear with a localized defect.
关键词: wind turbine planet gear fault feature extraction spectral kurtosis time wavelet energy spectrum
Correlation between tension softening relation and crack extension resistance in concrete
Xiufang ZHANG , Shilang XU ,
《结构与土木工程前沿(英文)》 2009年 第3卷 第3期 页码 323-329 doi: 10.1007/s11709-009-0041-2
关键词: concrete fracture process zone crack extension GR resistance tension softening curve
Calculation method of load distribution on pipe threaded connections under tension load
Shoujun CHEN, Lianxin GAO, Qi AN
《机械工程前沿(英文)》 2011年 第6卷 第2期 页码 241-248 doi: 10.1007/s11465-011-0219-x
This paper presents a new calculation method that can calculate the load distribution on pipe threaded connections under tension load. On the basis of elastic mechanics, the new method was developed by analyzing each thread tooth, and a new deformation and covariant equation by making a mechanics analysis on each thread tooth was obtained. Compared with the traditional method proposed by the previous references, the new deformation and covariant equation could be used to describe the relation between the previous and the next thread tooth. By applying the new method on the sample of P-110S pipe threaded connection, the obtained results show that the load on thread tooth mainly concentrates on the four or five threads engaged and the middle teeth were not utilized well to bear the loads. The model offers a new way to calculate the loads carried on the thread teeth under tension load.
关键词: load distribution calculation method pipe threaded connections tension load
Experimental investigation of fatigue behavior of spur gear in altered tooth-sum gearing
H. K. SACHIDANANDA, Joseph GONSALVIS, H. R. PRAKASH
《机械工程前沿(英文)》 2012年 第7卷 第3期 页码 268-278 doi: 10.1007/s11465-012-0331-6
This paper deals with the contact stress, power loss, and pitting of spur gear tooth in altered tooth-sum gearing for a tooth-sum of 100 teeth when altered by±4% tooth-sum. Analytical and experimental methods were performed to investigate and compare the altered tooth-sum gearing against the standard tooth-sum gearing. The experiments were performed using a power recirculating type test rig. The tooth loads for the experimental investigations were determined considering the surface durability of gears. A clear picture of the surface damage was obtained using a scanning electron microphotograph. The negative alteration in the tooth-sum performed better than the positive alteration in a tooth-sum operating between specified center distances.
关键词: spur gear power recirculating test rig altered tooth-sum gearing scanning electron microscopy (SEM)
Mesh relationship modeling and dynamic characteristic analysis of external spur gears with gear wear
《机械工程前沿(英文)》 2022年 第17卷 第1期 页码 9-9 doi: 10.1007/s11465-021-0665-z
关键词: gear wear mesh relationship mesh stiffness transmission error vibration characteristics
Comparing the effects of Bassini versus tension-free hernioplasty: 3 years’ follow-up
Yulong SHI, Zhongxue SU, Leping LI, Hongjun LIU, Changqing JING,
《医学前沿(英文)》 2010年 第4卷 第4期 页码 463-468 doi: 10.1007/s11684-010-0050-5
关键词: hernioplasty Bassini repair tension-free repair complication
《结构与土木工程前沿(英文)》 doi: 10.1007/s11709-023-0932-7
关键词: dynamic behaviors submerged floating tunnel cable failure mooring style progressive failure
标题 作者 时间 类型 操作
High-precision gyro-stabilized control of a gear-driven platform with a floating gear tension device
期刊论文
Laboratory experiment on using non-floating body to generate electrical energy from water waves
Arunachalam AMARKARTHIK, Srinivasan CHANDRASEKARAN, Karuppan SIVAKUMAR, Harender SINHMAR
期刊论文
Behavior of dam concrete under biaxial compression-tension and triaxial compression-compression-tension
WANG Huailiang, SONG Yupu
期刊论文
Gear fault diagnosis using gear meshing stiffness identified by gearbox housing vibration signals
期刊论文
Russian school of the theory and geometry of gearing: Its origin and golden period (1935 --1975)
Dmitry BABICHEV,Sergey LAGUTIN,Natalya BARMINA
期刊论文
Seismic stability of earth slopes with tension crack
Yundong ZHOU, Fei ZHANG, Jingquan Wang, Yufeng GAO, Guangyu DAI
期刊论文
Fault feature extraction of planet gear in wind turbine gearbox based on spectral kurtosis and time wavelet
Yun KONG, Tianyang WANG, Zheng LI, Fulei CHU
期刊论文
Correlation between tension softening relation and crack extension resistance in concrete
Xiufang ZHANG , Shilang XU ,
期刊论文
Calculation method of load distribution on pipe threaded connections under tension load
Shoujun CHEN, Lianxin GAO, Qi AN
期刊论文
Experimental investigation of fatigue behavior of spur gear in altered tooth-sum gearing
H. K. SACHIDANANDA, Joseph GONSALVIS, H. R. PRAKASH
期刊论文
Mesh relationship modeling and dynamic characteristic analysis of external spur gears with gear wear
期刊论文
Comparing the effects of Bassini versus tension-free hernioplasty: 3 years’ follow-up
Yulong SHI, Zhongxue SU, Leping LI, Hongjun LIU, Changqing JING,
期刊论文