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Manufacturing technique and performance of functionally graded concrete segment in shield tunnel
Baoguo MA, Dinghua ZOU, Li XU
《结构与土木工程前沿(英文)》 2009年 第3卷 第1期 页码 101-104 doi: 10.1007/s11709-009-0011-8
关键词: shield tunnel functionally graded concrete segment (FGCS) manufacturing technology performance
《结构与土木工程前沿(英文)》 2023年 第17卷 第4期 页码 584-605 doi: 10.1007/s11709-023-0916-7
关键词: functionally graded porous material curved nanobeam hygro–thermo–magnetic enriched finite element method
《结构与土木工程前沿(英文)》 2021年 第15卷 第6期 页码 1453-1479 doi: 10.1007/s11709-021-0767-z
关键词: damage detection deep feed-forward neural networks functionally graded carbon nanotube-reinforced composite plates modal kinetic energy
《结构与土木工程前沿(英文)》 页码 1072-1085 doi: 10.1007/s11709-023-0951-4
关键词: carbon nanotube MISQ20 FG-CNTRC plate nonlinear vibration nonlinear dynamic analysis SFEM
Van Chinh NGUYEN; Trung Thanh TRAN; Trung NGUYEN-THOI; Quoc-Hoa PHAM
《结构与土木工程前沿(英文)》 2022年 第16卷 第12期 页码 1599-1620 doi: 10.1007/s11709-022-0891-4
关键词: sandwich plates functionally graded porous static bending Quasi-3D theory Q4 element
《结构与土木工程前沿(英文)》 2023年 第17卷 第3期 页码 477-502 doi: 10.1007/s11709-023-0918-5
关键词: static bending free and forced vibrations nonlocal theory isogeometric analysis fluid-infiltrated porous nanoplates
Axisymmetric loading on nanoscale multilayered media
《结构与土木工程前沿(英文)》 2023年 第17卷 第1期 页码 152-164 doi: 10.1007/s11709-022-0895-0
关键词: functionally graded layer Gurtin–Murdoch surface elasticity multilayered medium size dependency stiffness matrix
Shaochun WANG, Xi JIANG, Yun BAI
《结构与土木工程前沿(英文)》 2019年 第13卷 第5期 页码 1200-1213 doi: 10.1007/s11709-019-0546-2
关键词: shield tunneling structural synthetic fiber concrete hand hole segment joint ultimate bearing capacity crack pattern
《结构与土木工程前沿(英文)》 页码 1033-1046 doi: 10.1007/s11709-023-0973-y
关键词: shield tunnel bearing capacity failure mechanism segment reinforcement
Implicit Heaviside filter with high continuity based on suitably graded THB splines
《机械工程前沿(英文)》 2022年 第17卷 第1期 页码 14-14 doi: 10.1007/s11465-021-0670-2
关键词: topology optimization truncated hierarchical B-spline isogeometric analysis black and white designs Heaviside filter
《环境科学与工程前沿(英文)》 doi: 10.1007/s11783-021-1481-8
For comprehensive insights into the influences of sulfate on performance, microbial community and metabolic pathways in the acidification phase of a two-phase anaerobic system, a laboratory-scale acidogenic bioreactor was continuously operated to treat wastewater with elevated sulfate concentrations from 2000 to 14000 mg/L.
关键词: Acidogenic phase reactor High-sulfate wastewater Sulfate reduction Acidogenic fermentation PICRUSt2
Endochronic damage constitutive model for fully-graded aggregate mass concrete
SONG Yupu, WANG Huailiang
《结构与土木工程前沿(英文)》 2007年 第1卷 第3期 页码 274-280 doi: 10.1007/s11709-007-0035-x
Wanghui BU, Zhenyu LIU, Jianrong TAN, Jin CHENG
《机械工程前沿(英文)》 2011年 第6卷 第4期 页码 463-467 doi: 10.1007/s11465-011-0225-z
The shield machine is a heavy construction machine for tunnel excavation, and the segment erector is an important subsystem of the shield machine. It is difficult to achieve precise control in the 6-DOF (degree of freedom) erector in the 2-DOF 5-bar radial mechanism. Hence, this paper proposes a redundantly actuated PRPRP radial mechanism for the segment erector. When the redundant actuator is unlocked, the radial mechanism is able to adjust its posture, which has two degrees of freedom. On the other hand, when the redundant actuator is locked or produces enough pre-tightening tensile force, the PRPRP mechanism can ensure the synchronization of the two driving hydraulic cylinders along the radial direction based on the mechanical structure, which has one degree of freedom. The redundant actuator also facilitates the equal application of two flexural torques at the hydraulic cylinders; thus, preventing the overload of a single cylinder.
关键词: redundant actuation parallel mechanisms five-bar mechanisms segment erectors shield machines
Hu SHI, Guofang GONG, Huayong YANG
《机械工程前沿(英文)》 2011年 第6卷 第3期 页码 369-376 doi: 10.1007/s11465-011-0223-1
Focusing on a segment erector of a shield-tunneling machine developed with 6 degrees of freedom (DOF) and controlled by electro-hydraulic proportional systems, the kinematics of the segment erection process is presented. The perturbation method in the error analysis is introduced to establish the position and attitude error model, considering a number of factors such as the hydraulic drive, control accuracy, and tolerance in manufacturing and assembly. Dynamic simulations are carried out to obtain the controlling precision of electrohydraulic drive systems. Formulas for calculating the position and attitude error of the grip hand of the segment erector are derived. The calculation results verify the practicality and effectiveness of the error analysis, providing a foundation for practical designing, manufacturing, and assembling of the segment of the erecting mechanism.
关键词: shield tunneling machine segment erector kinematics position and attitude precision
Analytical solution for SH wave propagating through a graded plate of metamaterial
Jinfeng ZHAO, Yongdong PAN, Zheng ZHONG
《机械工程前沿(英文)》 2011年 第6卷 第3期 页码 301-307 doi: 10.1007/s11465-011-0238-7
A physical model for the shear horizontal (SH) wave propagating from left-handed material (LHM) through a graded or transition layer to right-handed material (RHM) has been proposed in this paper. After the comparison of the basic wave equations of the electromagnetic, longitudinal, and SH waves, it is found that they take similar differential form. The analytical solutions have been found for power law, hyperbolic, and polynomial profiles. Numerical waveforms of the amplitude and phase of the displacement are obtained for the corresponding profiles. It is found that the waveforms are symmetric for the power law and hyperbolic profiles, and that the waveform for the polynomial profile is shifted and non-symmetric. The shift along with the anti-symmetric profile may provide a way to monitor the wave behavior of the metamaterials.
关键词: left-handed material (LHM) metamaterial shear horizontal (SH) wave
标题 作者 时间 类型 操作
Manufacturing technique and performance of functionally graded concrete segment in shield tunnel
Baoguo MA, Dinghua ZOU, Li XU
期刊论文
Free vibration analysis of functionally graded porous curved nanobeams on elastic foundation in hygro–thermo–magnetic
期刊论文
A deep feed-forward neural network for damage detection in functionally graded carbon nanotube-reinforced
期刊论文
Nonlinear dynamic analysis of functionally graded carbon nanotube-reinforced composite plates using MISQ20
期刊论文
A novel finite element formulation for static bending analysis of functionally graded porous sandwich
Van Chinh NGUYEN; Trung Thanh TRAN; Trung NGUYEN-THOI; Quoc-Hoa PHAM
期刊论文
Static and dynamic analysis of functionally graded fluid-infiltrated porous skew and elliptical nanoplates
期刊论文
The influence of hand hole on the ultimate strength and crack pattern of shield tunnel segment joints
Shaochun WANG, Xi JIANG, Yun BAI
期刊论文
Bending failure performance of a shield tunnel segment based on full-scale test and numerical analysis
期刊论文
PICRUSt2 functionally predicts organic compounds degradation and sulfate reduction pathways in an acidogenic
期刊论文
Endochronic damage constitutive model for fully-graded aggregate mass concrete
SONG Yupu, WANG Huailiang
期刊论文
A redundantly actuated PRPRP radial mechanism in the segment erector of a shield machine for synchronization
Wanghui BU, Zhenyu LIU, Jianrong TAN, Jin CHENG
期刊论文
Drive system design and error analysis of the 6 degrees of freedom segment erector of shield tunneling
Hu SHI, Guofang GONG, Huayong YANG
期刊论文