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Distribution of background equivalent static wind load on high-rise buildings
Jianguo ZHANG , Ming GU ,
《结构与土木工程前沿(英文)》 2009年 第3卷 第3期 页码 241-248 doi: 10.1007/s11709-009-0036-z
关键词: high-rise buildings along-wind cross-wind background equivalent static wind load close formulae
Hao WANG, Fengge ZHANG, Tao GUAN, Siyang YU
《机械工程前沿(英文)》 2017年 第12卷 第3期 页码 420-426 doi: 10.1007/s11465-017-0439-9
A brushless electrically excited synchronous generator (BEESG) with a hybrid rotor is a novel electrically excited synchronous generator. The BEESG proposed in this paper is composed of a conventional stator with two different sets of windings with different pole numbers, and a hybrid rotor with powerful coupling capacity. The pole number of the rotor is different from those of the stator windings. Thus, an analysis method different from that applied to conventional generators should be applied to the BEESG. In view of this problem, the equivalent circuit and electromagnetic torque expression of the BEESG are derived on the basis of electromagnetic relation of the proposed generator. The generator is simulated and tested experimentally using the established equivalent circuit model. The experimental and simulation data are then analyzed and compared. Results show the validity of the equivalent circuit model.
关键词: wind power brushless electrically excited synchronous generator hybrid rotor equivalent circuit
Tian ZHANG, He XIA, Weiwei GUO
《结构与土木工程前沿(英文)》 2018年 第12卷 第4期 页码 558-567 doi: 10.1007/s11709-017-0455-1
关键词: wind barrier sudden change of wind load dynamic response running safety comfort
Nitin Kumar SAXENA,Ashwani Kumar SHARMA
《能源前沿(英文)》 2015年 第9卷 第4期 页码 472-485 doi: 10.1007/s11708-015-0373-7
关键词: isolated hybrid power system (IHPS) composite load model static load dynamic load induction motor load model aggregate load
基于惯性能时空最优分布的高加速轻载机构精密定位方法 Article
陈新,白有盾,杨志军,高健,陈贡发
《工程(英文)》 2015年 第1卷 第3期 页码 391-398 doi: 10.15302/J-ENG-2015063
高速运动精密定位是微电子封装设备中高加速轻载执行机构的基本运动需求。本文推导了高加速机构瞬态非线性动力学响应方程,揭示了刚度、频率、阻尼 (与材料空间布局相关) 和驱动频率 (与运动规划相关) 是主要影响因素。据此,在满足高加速机构精密定位的条件下,笔者提出了一种基于最优非线性动力学响应的结构优化和速度规划新方法。在结构优化中,首先分析了目前流行的基于等效静态载荷的柔性多体动力学优化方法未充分考虑惯性载荷的不足,然后提出了基于等效模态的柔性多体动力学最优动态响应优化新方法;在速度规划上,针对传统的几何光滑方法不能反映系统动态特性的缺陷,提出了基于变边界条件非线性动力学响应优化的速度规划新方法。将所提方法应用到高速固晶焊头的优化设计中,通过结构优化,降低振幅超过20%,再经非对称变加速规划,缩短定位时间超过40%。本文提出的方法为微电子封装类装备等高加速轻载机构精密定位的实现提供了有效的理论支撑和解决途径。
Mean wind load induced incompatibility in nonlinear aeroelastic simulations of bridge spans
Zhitian ZHANG
《结构与土木工程前沿(英文)》 2019年 第13卷 第3期 页码 605-617 doi: 10.1007/s11709-018-0499-x
关键词: bridge aerodynamics nonlinear aeroelastic model Pseudo-steady mean wind loads
Yuan Yuan,Tang Jiong
《工程(英文)》 2017年 第3卷 第4期 页码 494-503 doi: 10.1016/J.ENG.2017.04.023
本文报道了风机控制领域最近才出现的一些新方法的调查研究结果。最近数年里,在时变不确定的紊乱风场中优化能量捕集效率和降低各个部件负荷的多元控制方法已经被广泛地研究。我们将相关的研究工作分为三类:风机建模和风机动力学研究、风机的主动控制和风机的被动控制。关于风机动力学研究,我们讨论了物理模型的建立,并且给出了空气弹性变形的分析工具。关于主动控制,我们审查了节距控制、扭矩控制和偏航控制等策略,包括相关的理论建立以及针对不同目的的应用情况。我们的研究主要关注风机叶片节距控制,节距控制被认为是在维持能量捕获性能的同时降低负荷的关键要素。关于被动控制,我们研究了调谐质量阻尼器、智能转子和Microtabs等技术。另外我们也提出了未来的一些研究方向。
B. R. JAYALEKSHMI,S.V. JISHA,R. SHIVASHANKAR
《结构与土木工程前沿(英文)》 2015年 第9卷 第3期 页码 307-322 doi: 10.1007/s11709-015-0288-8
关键词: finite element method piled raft tall chimney soil-structure interaction along-wind load
ANN-based empirical modelling of pile behaviour under static compressive loading
Abdussamad ISMAIL
《结构与土木工程前沿(英文)》 2018年 第12卷 第4期 页码 594-608 doi: 10.1007/s11709-017-0446-2
关键词: piles in compression load-deformation behaviour product-unit neural network
Linjia BAI, Yunfeng ZHANG
《结构与土木工程前沿(英文)》 2012年 第6卷 第3期 页码 199-209 doi: 10.1007/s11709-012-0168-4
关键词: collapse dynamic response fragility analysis Monte Carlo simulation wind load
Dynamic contribution of variable-speed wind energy conversion system in system frequency regulation
Yajvender Pal VERMA, Ashwani KUMAR
《能源前沿(英文)》 2012年 第6卷 第2期 页码 184-192 doi: 10.1007/s11708-012-0185-y
关键词: doubly fed induction generator (DFIG) load frequency control inertial control wind energy conversion system (WECS)
Finding buckling points for nonlinear structures by dynamic relaxation scheme
Mohammad REZAIEE-PAJAND, Hossein ESTIRI
《结构与土木工程前沿(英文)》 2020年 第14卷 第1期 页码 23-61 doi: 10.1007/s11709-019-0549-z
关键词: load factor external work dynamic relaxation static equilibrium path large displacement
Experimental study of wind loads on gable roofs of low-rise buildings with overhangs
Peng HUANG, Ling TAO, Ming GU, Yong QUAN
《结构与土木工程前沿(英文)》 2018年 第12卷 第3期 页码 300-317 doi: 10.1007/s11709-018-0449-7
Gable roofs with overhangs (eaves) are the common constructions of low-rise buildings on the southeastern coast of China, and they were vulnerable to typhoons from experience. The wind pressure distributions on gable roofs of low-rise buildings are investigated by a series of wind tunnel tests which consist of 99 test cases with various roof pitches, height-depth ratios and width-depth ratios. The block pressure coefficients and worst negative (block) pressure coefficients on different roof regions of low-rise buildings are proposed for the main structure and building envelope, respectively. The effects of roof pitch, height-depth ratio, and width-depth ratio on the pressure coefficients of each region are analyzed in detail. In addition, the pressure coefficients on the roofs for the main structure and building envelope are fitted according to roof pitch, height-depth ratio and width-depth ratio of the low-rise building. Meanwhile, the rationality of the fitting formulas is verified by comparing the fitting results with the codes of different countries. Lastly, the block pressure coefficients and worst negative pressure coefficients are recommended to guide the design of low-rise buildings in typhoon area and act as references for the future’s modification of wind load codes.
关键词: low-rise building gable roof wind loads wind tunnel test block pressure coefficient load code
Nitin SAXENA,Ashwani KUMAR
《能源前沿(英文)》 2014年 第8卷 第2期 页码 261-268 doi: 10.1007/s11708-014-0298-6
关键词: isolated wind-diesel power system adaptive neuro fuzzy interference system (ANFIS) integral square error (ISE) criterion load interaction
Yajvender Pal VERMA, Ashwani KUMAR
《能源前沿(英文)》 2013年 第7卷 第2期 页码 245-254 doi: 10.1007/s11708-012-0218-6
关键词: frequency regulation fuzzy controller de-regulated power system doubly fed induction generator (DFIG) bilateral contract
标题 作者 时间 类型 操作
Distribution of background equivalent static wind load on high-rise buildings
Jianguo ZHANG , Ming GU ,
期刊论文
Equivalent circuit and characteristic simulation of a brushless electrically excited synchronous wind
Hao WANG, Fengge ZHANG, Tao GUAN, Siyang YU
期刊论文
Analysis on running safety of train on the bridge considering sudden change of wind load caused by wind
Tian ZHANG, He XIA, Weiwei GUO
期刊论文
Estimation of composite load model with aggregate induction motor dynamic load for an isolated hybrid
Nitin Kumar SAXENA,Ashwani Kumar SHARMA
期刊论文
Mean wind load induced incompatibility in nonlinear aeroelastic simulations of bridge spans
Zhitian ZHANG
期刊论文
Response in piled raft foundation of tall chimneys under along-wind load incorporating flexibility of
B. R. JAYALEKSHMI,S.V. JISHA,R. SHIVASHANKAR
期刊论文
ANN-based empirical modelling of pile behaviour under static compressive loading
Abdussamad ISMAIL
期刊论文
Collapse fragility assessment of steel roof framings with force limiting devices under transient wind
Linjia BAI, Yunfeng ZHANG
期刊论文
Dynamic contribution of variable-speed wind energy conversion system in system frequency regulation
Yajvender Pal VERMA, Ashwani KUMAR
期刊论文
Finding buckling points for nonlinear structures by dynamic relaxation scheme
Mohammad REZAIEE-PAJAND, Hossein ESTIRI
期刊论文
Experimental study of wind loads on gable roofs of low-rise buildings with overhangs
Peng HUANG, Ling TAO, Ming GU, Yong QUAN
期刊论文
Reactive power compensation of an isolated hybrid power system with load interaction using ANFIS tuned
Nitin SAXENA,Ashwani KUMAR
期刊论文