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Temperature difference-powered carbon nanotube bearings
Quanwen HOU, Bingyang CAO, Zengyuan GUO
《能源前沿(英文)》 2011年 第5卷 第1期 页码 49-52 doi: 10.1007/s11708-010-0111-0
关键词: temperature difference-induced motion carbon nanotubes nanobearing molecular dynamics simulation
Synthesis of Intermittent-Motion Linkages with Slight Difference in Length Between Links
CHEN Xin-bo, YU Zhen
《机械工程前沿(英文)》 2006年 第1卷 第1期 页码 76-79 doi: 10.1007/s11465-005-0007-6
The design of intermittent-motion linkages using traditional methods is usually complicated. In this paper, (1) a new method for realizing intermittent motion, using linkages with a slight difference in length between links, is studied; (2) some new types of intermittent-motion linkages and their software for visual analysis and design are developed; and (3) influences of some design parameters on intermittent-motion characteristics are clarified. Results confirmed that the theory and the software are useful, making the synthesis of intermittent-motion linkages clear and easy.
关键词: synthesis useful intermittent intermittent-motion traditional
付强,王国荣,周守为,钟林,张理,余兴勇,杨浦
《中国工程科学》 2021年 第23卷 第6期 页码 52-60 doi: 10.15302/J-SSCAE-2021.06.007
我国海洋温差能资源量巨大,主要分布在广东省和南海海域,是区域能源结构优化以实现碳达峰、碳中和的有效支撑,也是未来我国南海、 21 世纪海上丝绸之路沿线诸多岛屿能源补给保障的重要途径;目前海洋温差能发电( OTEC)技术和装备尚处于实验阶段,兆瓦级试验电站建设成本巨大,整体技术成熟度不及商业级利用规模,亟待发展突破。本文总结了国内外 OTEC 及综合利用的发展模式、技术装备所面临的挑战,针对南海温差能资源开发困境、广东省液化天然气( LNG)冷能资源浪费等情况,提出了以 LNG 气化的低温海水替代深层海水进行温差能发电的新途径。建议以珠海 LNG 气化站为例,探索 LNG 冷能回收 – 温差能发电、低温冷海水综合利用示范基地的发展模式;通过初步概算示范基地的投资与收益,完成了相应模式的经济与技术可行性论证。相关发展模式建议、应用案例论证过程,可为我国温差能与低温海水资源综合利用提供技术借鉴和应用参考。
Hulin HUANG, Xiaoming ZHOU,
《能源前沿(英文)》 2010年 第4卷 第2期 页码 155-160 doi: 10.1007/s11708-009-0063-4
关键词: magnetohydrodynamic magnetic fields thermocapillary convection critical temperature difference oscillatory convection two-layer fluid system
Phase separation time/temperature dependence of thermoplastics-modified thermosetting systems
ZHANG Xiujuan, XU Yuanze, YI Xiaosu
《化学科学与工程前沿(英文)》 2008年 第2卷 第3期 页码 276-285 doi: 10.1007/s11705-008-0057-5
关键词: separation time-temperature temperature dependency cure-induced separation activation temperature
Offline motion planning and simulation of two-robot welding coordination
Tie ZHANG, Fan OUYANG
《机械工程前沿(英文)》 2012年 第7卷 第1期 页码 81-92 doi: 10.1007/s11465-012-0309-4
This paper focuses on the two-robot welding coordination of complex curve seam which means one robot grasp the workpiece, the other hold the torch, the two robots work on the same workpiece simultaneously. This paper builds the dual-robot coordinate system at the beginning, and three point calibration method of two robots’ relative base coordinate system is presented. After that, the non master/slave scheme is chosen for the motion planning, the non master/slave scheme sets the poses versus time function of the point u on the workpiece, and calculates the two robot end effecter trajectories through the constrained relationship matrix automatically. Moreover, downhand welding is employed which can guarantee the torch and the seam keep in good contact condition all the time during the welding. Finally, a Solidworks-SimMechanics simulation platform is established, and a simulation of curved steel pipe welding is conducted. The results of the simulation illustrate the welding process can meet the requirements of downhand welding, the joint displacement curves are smooth and continuous and no joint velocities are out of working scope.
关键词: complex curve seam two robots coordinated welding motion planning
Influence of loading ratio on flat slab connections at elevated temperature: A numerical study
Rwayda Kh. S. AL-HAMD, Martin GILLIE, Safaa Adnan MOHAMAD, Lee S. CUNNINGHAM
《结构与土木工程前沿(英文)》 2020年 第14卷 第3期 页码 664-674 doi: 10.1007/s11709-020-0620-9
关键词: concrete finite elements fire load-induced thermal strain punching shear
Design and modeling of continuum robot based on virtual-center of motion mechanism
《机械工程前沿(英文)》 2023年 第18卷 第2期 doi: 10.1007/s11465-022-0739-6
关键词: VCM mechanism continuum robot flexural joint pseudo-rigid body model cable-driven
Bao-long Yuan,Sheng-gang Ren,Xing Hu,Xuan-yu Yang
《工程管理前沿(英文)》 2016年 第3卷 第1期 页码 24-29 doi: 10.15302/J-FEM-2016007
关键词: environmental regulation technology innovation stage difference manufacturing
Masoud RANJBARNIA, Milad ZAHERI, Daniel DIAS
《结构与土木工程前沿(英文)》 2020年 第14卷 第4期 页码 998-1011 doi: 10.1007/s11709-020-0621-8
关键词: urban tunnel sprayed concrete reverse fault normal fault finite difference analysis
Measurement and analysis of typical motion error traces from a circular test
LI Xiaoli, LIU Huanlao
《机械工程前沿(英文)》 2008年 第3卷 第2期 页码 146-150 doi: 10.1007/s11465-008-0033-2
关键词: machine compensation direction combination desired efficient
Rini NISHANTH, Andrew WHYTE, V. John KURIAN
《工程管理前沿(英文)》 2018年 第5卷 第3期 页码 357-368 doi: 10.15302/J-FEM-2018022
Floating production storage and offloading (FPSO) units increasingly represent a practical and economic means for deep-water oil extraction and production. Systems thinking gives a unique opportunity to seek a balance between FPSO technical performance(s), with whole-cost; stakeholder decision-making is charged to align different fit-for-use design specification options’ that address technical-motion(s), with respective life-cycle cost analyses (LCCA). Soft system methodology allows situation based analyses over set periods-of-time by diagnosing the problem-at-hand; namely, assessing the antecedents of life-cycle cost relative to FPSO sub-component design alternatives. Alternative mooring- component comparisons for either new-build hulls or refurbished hulls represent an initial necessary consideration to facilitate extraction, production and storage of deep-water oil reserves. Coupled dynamic analysis has been performed to generate FPSO motion in six degrees of freedom using SESAM DeepC, while life-cycle cost analysis (LCAA) studies give net-present-value comparisons reflective of market conditions. A parametric study has been conducted by varying wave heights from 4 – 8 m to understand FPSO motion behavior in the presence of wind and current, as well as comparing the motions of turreted versus spread mooring design alternatives. LCCA data has been generated to compare the cost of such different mooring options/hull conditions over 10 and 25-year periods. Systems thinking has been used to explain the interaction of problem variables; resultantly this paper is able to identify explicit factors affecting the choice of FPSO configurations in terms of motion and whole-cost, toward assisting significantly with the front-end engineering design (FEED) phase of fit-for-purpose configured FPSOs, in waters off Malaysia and Australia.
关键词: FPSO LCCA spread/turret-mooring DeepC cost motion soft-systems
Novel probabilistic rolling regular tetrahedron mechanism
Yonghan GUAN, Yan’an YAO, Chao LIU, Ruiming LI
《机械工程前沿(英文)》 2021年 第16卷 第2期 页码 363-378 doi: 10.1007/s11465-020-0628-9
关键词: mobile mechanism probabilistic motion rolling mechanism stochastic motion
标题 作者 时间 类型 操作
Temperature difference-powered carbon nanotube bearings
Quanwen HOU, Bingyang CAO, Zengyuan GUO
期刊论文
Synthesis of Intermittent-Motion Linkages with Slight Difference in Length Between Links
CHEN Xin-bo, YU Zhen
期刊论文
MHD effect on the critical temperature differences of oscillatory thermocapillary convection in two-layer
Hulin HUANG, Xiaoming ZHOU,
期刊论文
Phase separation time/temperature dependence of thermoplastics-modified thermosetting systems
ZHANG Xiujuan, XU Yuanze, YI Xiaosu
期刊论文
Influence of loading ratio on flat slab connections at elevated temperature: A numerical study
Rwayda Kh. S. AL-HAMD, Martin GILLIE, Safaa Adnan MOHAMAD, Lee S. CUNNINGHAM
期刊论文
The Difference Effect of Environmental Regulation on Two Stages of Technology Innovation in China’s Manufacturing
Bao-long Yuan,Sheng-gang Ren,Xing Hu,Xuan-yu Yang
期刊论文
Three-dimensional finite difference analysis of shallow sprayed concrete tunnels crossing a reverse fault
Masoud RANJBARNIA, Milad ZAHERI, Daniel DIAS
期刊论文
Measurement and analysis of typical motion error traces from a circular test
LI Xiaoli, LIU Huanlao
期刊论文
Floating production storage and offloading systems’ cost and motion performance: A systems thinking application
Rini NISHANTH, Andrew WHYTE, V. John KURIAN
期刊论文