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Instantaneous deflection of light-weight concrete slabs
Behnam VAKHSHOURI, Shami NEJADI
《结构与土木工程前沿(英文)》 2017年 第11卷 第4期 页码 412-423 doi: 10.1007/s11709-017-0416-8
关键词: instantaneous deflection light-weight concrete expanded polystyrene effective moment of inertia cracking moment moment capacity service moment
Estimating moment capacity of ferrocement members using self-evolving network
Abdussamad ISMAIL
《结构与土木工程前沿(英文)》 2019年 第13卷 第4期 页码 926-936 doi: 10.1007/s11709-019-0527-5
关键词: ferrocement moment capacity self-evolving neural network
Shaking-moment balancing of mechanisms with principal vectors and momentum
V. van der WIJK
《机械工程前沿(英文)》 2013年 第8卷 第1期 页码 10-16 doi: 10.1007/s11465-013-0359-2
The design of shaking-moment-balanced linkages still is challenging. Considering moment balance in the very beginning of the design process of mechanisms is important for finding applicable solutions. For this purpose, the method of principal vectors is investigated, showing a compact notation of the angular momentum with respect to the center of mass. The moment balance conditions are derived for three elements in series from which balance solutions are synthesized and illustrated. From the application for moment balancing of a 4R four-bar linkage it is shown that the moment balancing of closed kinematic chains remains challenging.
关键词: shaking-moment balancing principal vector linkage angular momentum
Initial stiffness and moment resistance of reinforced joint with end-plate connection
Sufang WANG, Yiyi CHEN,
《结构与土木工程前沿(英文)》 2009年 第3卷 第4期 页码 345-351 doi: 10.1007/s11709-009-0054-x
关键词: steel structure end-plate connection backing plate supplementary web plate initial stiffness moment resistance
解决未来低惯量电力系统的频率控制难题——英国视角 Perspective
洪启腾, Md Asif Uddin Khan, Callum Henderson, Agustí Egea-Àlvarez, Dimitrios Tzelepis, Campbell Booth
《工程(英文)》 2021年 第7卷 第8期 页码 1057-1063 doi: 10.1016/j.eng.2021.06.005
为实现全球艰巨的脱碳目标,电力系统需大规模整合可再生能源发电,这大大降低了系统惯量。除了系统惯量的降低,英国的输电系统还有一些特有的难题:其容量相对较小,同时又与其他输电系统分离,并且可再生资源在整个系统中的分布很大程度上不均匀。本文聚焦英国的输电系统,就低惯量系统中频率控制的相关挑战以及可能的解决方案提出了见解和建议。本文重点讨论了在不同时间尺度上发挥作用的三种主要技术:同步调相机、惯量模拟和快速频率响应。文中借鉴了英国最近的研究和开发项目,评估了其相对优势和局限性及其在解决未来低惯量系统频率控制难题方面的作用。
Rare-earth separation based on the differences of ionic magnetic moment via quasi-liquid strategy
《化学科学与工程前沿(英文)》 2023年 第17卷 第10期 页码 1584-1594 doi: 10.1007/s11705-022-2189-4
关键词: rare earth element different magnetic moment magnetic separation ionic liquid
Improved prediction of pile bending moment and deflection due to adjacent braced excavation
《结构与土木工程前沿(英文)》 doi: 10.1007/s11709-023-0961-2
关键词: pile responses excavation prediction deflection bending moments
Dynamic modeling of hydrostatic guideway considering compressibility and inertia effect
Yikang DU,Kuanmin MAO,Yaming ZHU,Fengyun WANG,Xiaobo MAO,Bin LI
《机械工程前沿(英文)》 2015年 第10卷 第1期 页码 78-88 doi: 10.1007/s11465-015-0331-4
Hydrostatic guideways are used as an alternative to contact bearings due to high stiffness and high damping in heavy machine tools. To improve the dynamic characteristic of bearing structure, the dynamic modeling of the hydrostatic guidway should be accurately known. This paper presents a “mass-spring-Maxwell” model considering the effects of inertia, squeeze, compressibility and static bearing. To determine the dynamic model coefficients, numerical simulation of different cases between displacement and dynamic force of oil film are performed with fluent code. Simulation results show that hydrostatic guidway can be taken as a linear system when it is subjected to a small oscillation amplitude. Based on a dynamic model and numerical simulation, every dynamic model’s parameters are calculated by the Levenberg-Marquardt algorithm. Identification results show that “mass-spring-damper” model is the most appropriate dynamic model of the hydrostatic guidway. This paper provides a reference and preparation for the analysis of the dynamic model of the similar hydrostatic bearings.
关键词: hydrostatic guidway dynamic model dynamic mesh technique Levenberg-Marquardt mass-spring-damper model
High-order moment methods for LRFD including random variables with unknown probability distributions
Zhao-Hui LU, Yan-Gang ZHAO, Zhi-Wu YU
《结构与土木工程前沿(英文)》 2013年 第7卷 第3期 页码 288-295 doi: 10.1007/s11709-013-0210-1
关键词: high-order moment methods applicable range load and resistance factors target mean resistance
《结构与土木工程前沿(英文)》 2021年 第15卷 第4期 页码 851-866 doi: 10.1007/s11709-021-0739-3
关键词: damage identification beam-to-column connection time-domain response optimization
周勇,李正军,马超,王小宁
《中国工程科学》 2014年 第16卷 第3期 页码 43-49
海洋二号(HY-2A)卫星要求微波散射计和微波辐射计实现扫描过程中所产生的力矩波动不能影响卫星姿态稳定度。这两个载荷使用永磁同步电动机矢量控制,对负载直接驱动;通过电机本体采用齿槽转矩优化设计、采用固定角度计时法消除量化误差、相电流测量误差控制、逆变器死区补偿等措施,抑制转矩波动。通过电机本体和控制策略进行联合精确模型仿真,分析了系统的转矩波动。由在轨遥测数据分析可得,实现了大惯量旋转部件的精确控制。
Yan-Gang ZHAO, Zhao-Hui LU
《结构与土木工程前沿(英文)》 2011年 第5卷 第3期 页码 315-322 doi: 10.1007/s11709-011-0117-7
关键词: load and resistance factors third-moment method three-parameter lognormal (3P-lognormal) distribution target mean resistance simple formula
Seismic performance of moment resisting steel frame subjected to earthquake excitations
Fadzli M. NAZRI, Pang Yew KEN
《结构与土木工程前沿(英文)》 2014年 第8卷 第1期 页码 19-25 doi: 10.1007/s11709-014-0240-3
关键词: incremental dynamic analysis (IDA) pushover analysis performance-based seismic design
Mohammad Ali NAGHSH, Aydin SHISHEGARAN, Behnam KARAMI, Timon RABCZUK, Arshia SHISHEGARAN, Hamed TAGHAVIZADEH, Mehdi MORADI
《结构与土木工程前沿(英文)》 2021年 第15卷 第1期 页码 194-212 doi: 10.1007/s11709-020-0688-2
关键词: column-tree moment connection Finite element model parametric study fire regression models gene expression programming
Moment-curvature relationship of FRP-concrete-steel double-skin tubular members
Mingxue LIU, Jiaru QIAN
《结构与土木工程前沿(英文)》 2009年 第3卷 第1期 页码 25-31 doi: 10.1007/s11709-009-0012-7
关键词: fiber reinforced polymer (FRP) concrete steel double-skin tubular members (DSTMs) moment-curvature curve flexural strength
标题 作者 时间 类型 操作
Estimating moment capacity of ferrocement members using self-evolving network
Abdussamad ISMAIL
期刊论文
Initial stiffness and moment resistance of reinforced joint with end-plate connection
Sufang WANG, Yiyi CHEN,
期刊论文
解决未来低惯量电力系统的频率控制难题——英国视角
洪启腾, Md Asif Uddin Khan, Callum Henderson, Agustí Egea-Àlvarez, Dimitrios Tzelepis, Campbell Booth
期刊论文
Rare-earth separation based on the differences of ionic magnetic moment via quasi-liquid strategy
期刊论文
Dynamic modeling of hydrostatic guideway considering compressibility and inertia effect
Yikang DU,Kuanmin MAO,Yaming ZHU,Fengyun WANG,Xiaobo MAO,Bin LI
期刊论文
High-order moment methods for LRFD including random variables with unknown probability distributions
Zhao-Hui LU, Yan-Gang ZHAO, Zhi-Wu YU
期刊论文
Damage identification in connections of moment frames using time domain responses and an optimization
期刊论文
Estimation of load and resistance factors using the third-moment method based on the 3P-lognormal distribution
Yan-Gang ZHAO, Zhao-Hui LU
期刊论文
Seismic performance of moment resisting steel frame subjected to earthquake excitations
Fadzli M. NAZRI, Pang Yew KEN
期刊论文
An innovative model for predicting the displacement and rotation of column-tree moment connection under
Mohammad Ali NAGHSH, Aydin SHISHEGARAN, Behnam KARAMI, Timon RABCZUK, Arshia SHISHEGARAN, Hamed TAGHAVIZADEH, Mehdi MORADI
期刊论文