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Experimental investigation and design of aluminum columns with longitudinal welds
Yun WU, Qilin ZHANG
《结构与土木工程前沿(英文)》 2011年 第5卷 第3期 页码 366-373 doi: 10.1007/s11709-011-0101-2
关键词: aluminum alloy longitudinal weld heat-affected zone (HAZ) reduced strength zone (RSZ) buckling column experimental study
TAO Wenquan, WU Junmei
《能源前沿(英文)》 2008年 第2卷 第1期 页码 71-78 doi: 10.1007/s11708-008-0001-x
关键词: inherent mechanism integral surface rectanglar longitudinal
An adaptive sliding mode control technology for weld seam tracking
Jie LIU,Youmin HU,Bo WU,Kaibo ZHOU,Mingfeng GE
《机械工程前沿(英文)》 2015年 第10卷 第1期 页码 95-101 doi: 10.1007/s11465-015-0332-3
A novel adaptive sliding mode control algorithm is derived to deal with seam tracking control problem of welding robotic manipulator, during the process of large-scale structure component welding. The proposed algorithm does not require the precise dynamic model, and is more practical. Its robustness is verified by the Lyapunov stability theory. The analytical results show that the proposed algorithm enables better high-precision tracking performance with chattering-free than traditional sliding mode control algorithm under various disturbances.
关键词: weld seam tracking welding robotic manipulator adaptive control sliding mode control
Analytical and numerical investigation into the longitudinal vibration of uniform nanotubes
null
《机械工程前沿(英文)》 2014年 第9卷 第2期 页码 142-149 doi: 10.1007/s11465-014-0292-z
In recent years, prediction of the behaviors of micro and nanostructures is going to be a matter of increasing concern considering their developments and uses in various engineering fields. Since carbon nanotubes show the specific properties such as strength and special electrical behaviors, they have become the main subject in nanotechnology researches. On the grounds that the classical continuum theory cannot accurately predict the mechanical behavior of nanostructures, nonlocal elasticity theory is used to model the nanoscaled systems. In this paper, a nonlocal model for nanorods is developed, and it is used to model the carbon nanotubes with the aim of the investigating into their longitudinal vibration. Following the derivation of governing equation of nanorods and estimation of nondimensional frequencies, the effect of nonlocal parameter and the length of the nanotube on the obtained frequencies are studied. Furthermore, differential quadrature method, as a numerical solution technique, is used to study the effect of these parameters on estimated frequencies for both classical and nonlocal theories.
关键词: continuum theory differential quadrature method nanorod longitudinal vibration
《结构与土木工程前沿(英文)》 2023年 第17卷 第1期 页码 37-52 doi: 10.1007/s11709-022-0920-3
关键词: tunnel–soil interaction discontinuous analysis longitudinal joints existing shield tunnel Timoshenko beam Dirac delta function
《结构与土木工程前沿(英文)》 2023年 第17卷 第5期 页码 704-721 doi: 10.1007/s11709-023-0941-6
关键词: precast steel–UHPC composite beam flexural performance longitudinal shear performance parametric study transverse reinforcement ratio
Range of ecological impact of highway construction in the Longitudinal Range-Gorge Region, China
Jie LIU, Fan CHEN, Haiqing GENG, Xinxin QIU, Binbin CAI,
《环境科学与工程前沿(英文)》 2010年 第4卷 第3期 页码 349-360 doi: 10.1007/s11783-010-0027-2
关键词: range of impact quantitative analysis highway construction Longitudinal Range-Gorge Region
HUANG Yong, FAN Ding, FAN Qinghua
《机械工程前沿(英文)》 2007年 第2卷 第4期 页码 442-447 doi: 10.1007/s11465-007-0076-9
Mostafa FAKHARIFAR,Ahmad DALVAND,Mohammad K. SHARBATDAR,Genda CHEN,Lesley SNEED
《结构与土木工程前沿(英文)》 2016年 第10卷 第1期 页码 44-62 doi: 10.1007/s11709-015-0295-9
关键词: FRP ductility confinement seismic shear
WU Junmei, TAO Wenquan
《能源前沿(英文)》 2007年 第1卷 第3期 页码 365-369 doi: 10.1007/s11708-007-0055-1
关键词: computational inherent mechanism staggered decrease transfer surface
Local fracture properties and dissimilar weld integrity in nuclear power plants
Guozhen WANG, Haitao WANG, Fuzhen XUAN, Shantung TU, Changjun LIU
《机械工程前沿(英文)》 2013年 第8卷 第3期 页码 283-290 doi: 10.1007/s11465-013-0250-1
In this paper, the local fracture properties in a Alloy52M dissimilar metal welded joint (DMWJ) between A508 ferritic steel and 316 L stainless steel in nuclear power plants were investigated by using the single-edge notched bend (SENB) specimens, and their use in integrity assessment of DMWJ structures was analyzed. The results show that the local fracture resistance in the DMWJ is determined by local fracture mechanism, and which is mainly related to the microstructures and local strength mismatches of materials at the crack locations. The initial cracks always grow towards the materials with lower strength, and the crack path deviation is mainly controlled by the local strength mismatch. If the local fracture properties could not be used for cracks in the heat affected zones (HAZs), interface and near interface zones, the use of the fracture properties ( -resistance curves) of base metals or weld metals following present codes will unavoidably produce non-conservative (unsafe) or excessive conservative assessment results. In most cases, the assessment results will be potentially unsafe. Therefore, it is recommended to obtain and use local mechanical and fracture properties in the integrity assessment of DMWJs.
关键词: local fracture properties dissimilar metal welded joint integrity assessment strength mismatch crack growth path
Guofeng MA, Renke KANG, Zhigang DONG, Sen YIN, Yan BAO, Dongming GUO
《机械工程前沿(英文)》 2020年 第15卷 第4期 页码 538-546 doi: 10.1007/s11465-020-0598-y
关键词: longitudinal–torsional coupled ultrasonically drilling CFRP thrust force hole quality
Sensitivity analysis and numerical experiments on transient test of compact heat exchanger surfaces
REN Hesheng, LAI Lingjun, CUI Yongzheng
《能源前沿(英文)》 2008年 第2卷 第4期 页码 374-380 doi: 10.1007/s11708-008-0079-1
关键词: coefficient dimensionless longitudinal longitudinal temperature conduction
《医学前沿(英文)》 2022年 第16卷 第4期 页码 574-583 doi: 10.1007/s11684-021-0882-1
刘江虹,朱伟,廖光煊
《中国工程科学》 2012年 第14卷 第11期 页码 75-81
构建了小型低速风洞,利用三维激光多普勒测速计和自适性相位多普勒速度计系统(三维LDV/APV系统),通过观察和测量超声雾化细水雾在不同纵向风速影响下的运动特性,获取了细水雾的平均速度、平均粒径和雾通量等特性参数,实验结果表明,实验空间内同一截面上雾滴速度分布与风速呈两段式的线性变化,增加通风后雾滴粒径显著增大并趋于稳定,而雾通量也呈线性增长;雾滴速度和粒径受雾滴运动距离的影响很小,但是雾通量会随着运动距离的增加明显减小。实验结果对纵向通风条件下细水雾灭火设计具有一定的指导意义。
标题 作者 时间 类型 操作
Experimental investigation and design of aluminum columns with longitudinal welds
Yun WU, Qilin ZHANG
期刊论文
Numerical investigation and analysis of heat transfer enhancement in channel by longitudinal vortex based
TAO Wenquan, WU Junmei
期刊论文
An adaptive sliding mode control technology for weld seam tracking
Jie LIU,Youmin HU,Bo WU,Kaibo ZHOU,Mingfeng GE
期刊论文
Analytical and numerical investigation into the longitudinal vibration of uniform nanotubes
null
期刊论文
Discontinuous mechanical behaviors of existing shield tunnel with stiffness reduction at longitudinal
期刊论文
Flexural and longitudinal shear performance of precast lightweight steel–ultra-high performance concrete
期刊论文
Range of ecological impact of highway construction in the Longitudinal Range-Gorge Region, China
Jie LIU, Fan CHEN, Haiqing GENG, Xinxin QIU, Binbin CAI,
期刊论文
Study of mechanism of activating flux increasing weld penetration of AC A-TIG welding for aluminum alloy
HUANG Yong, FAN Ding, FAN Qinghua
期刊论文
Innovative hybrid reinforcement constituting conventional longitudinal steel and FRP stirrups for improved
Mostafa FAKHARIFAR,Ahmad DALVAND,Mohammad K. SHARBATDAR,Genda CHEN,Lesley SNEED
期刊论文
Numerical analysis on heat transfer enhancement by longitudinal vortex based on field synergy principle
WU Junmei, TAO Wenquan
期刊论文
Local fracture properties and dissimilar weld integrity in nuclear power plants
Guozhen WANG, Haitao WANG, Fuzhen XUAN, Shantung TU, Changjun LIU
期刊论文
Hole quality in longitudinal–torsional coupled ultrasonic vibration assisted drilling of carbon fiber
Guofeng MA, Renke KANG, Zhigang DONG, Sen YIN, Yan BAO, Dongming GUO
期刊论文
Sensitivity analysis and numerical experiments on transient test of compact heat exchanger surfaces
REN Hesheng, LAI Lingjun, CUI Yongzheng
期刊论文
Lung function and air pollution exposure in adults with asthma in Beijing: a 2-year longitudinal panel
期刊论文