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Approximation of structural damping and input excitation force
Mohammad SALAVATI
《结构与土木工程前沿(英文)》 2017年 第11卷 第2期 页码 244-254 doi: 10.1007/s11709-016-0371-9
关键词: structural modal parameters damping identification method input excitation force identification Inverse problem
Nonlinear dynamics of a wind turbine tower
A. GESUALDO, A. IANNUZZO, F. PENTA, M. MONACO
《机械工程前沿(英文)》 2019年 第14卷 第3期 页码 342-350 doi: 10.1007/s11465-019-0524-3
关键词: nonlinear dynamics plastic shear failure modal approximation time history
Pengxing YI,Peng HUANG,Tielin SHI
《机械工程前沿(英文)》 2016年 第11卷 第4期 页码 388-402 doi: 10.1007/s11465-016-0404-z
Wind turbine gearbox (WTG), which functions as an accelerator, ensures the performance and service life of wind turbine systems. This paper examines the distinctive modal properties of WTGs through finite element (FE) and experimental modal analyses. The study is performed in two parts. First, a whole system model is developed to investigate the first 10 modal frequencies and mode shapes of WTG using flexible multi-body modeling techniques. Given the complex structure and operating conditions of WTG, this study applies spring elements to the model and quantifies how the bearings and gear pair interactions affect the dynamic characteristics of WTGs. Second, the FE modal results are validated through experimental modal analyses of a 1.5 WM WTG using the frequency response function method of single point excitation and multi-point response. The natural frequencies from the FE and experimental modal analyses show favorable agreement and reveal that the characteristic frequency of the studied gearbox avoids its eigen-frequency very well.
关键词: wind turbine gearbox modal analysis finite element analysis modal frequency bearing equivalence
Experimental and computational validation of a scaled train tunnel model using modal analysis
Janice B. D’SOUZA, Sangarapillai KANAPATHIPILLAI
《机械工程前沿(英文)》 2013年 第8卷 第4期 页码 420-428 doi: 10.1007/s11465-013-0281-7
Acoustic engineers are faced with the challenge of minimising reverberation time in their designs so as to contribute to the health and well-being of those traveling by train and those on the platforms. Although the problem is easy to identify, it is not as simple to solve. The acoustical environment of a train tunnel is complex, with a variety of noise contributing factors such as train announcements, speech of commuters, ventilation systems, electrical equipment and wheel and rail noise. As a result, there is some difficulty in modeling the complete acoustic environment with computational or acoustic first principles. In this study, an experimental rig was constructed to model the acoustic behavior within a tunnel. The modal properties for the 300 Hz to 1500 Hz range, including resonances and mode shapes were identified and were shown to successfully correspond to theoretical results and a computational model created in COMSOL using Finite Element Analysis.
关键词: reverberation time acoustic environment modal properties resonances
Yuan WANG, Ruyan SHOU, Loo Hay LEE, Ek Peng CHEW
《工程管理前沿(英文)》 2017年 第4卷 第3期 页码 338-347 doi: 10.15302/J-FEM-2017032
关键词: supply chain network stochastic demand sampling average approximation Bayesian bootstrap Latin hypercube sampling
Variational mode decomposition based modal parameter identification in civil engineering
Mingjie ZHANG, Fuyou XU
《结构与土木工程前沿(英文)》 2019年 第13卷 第5期 页码 1082-1094 doi: 10.1007/s11709-019-0537-3
关键词: modal parameter identification variational mode decomposition civil structure nonlinear system closely spaced modes
Zhigen WU, Guohua LIU, Zihua ZHANG
《结构与土木工程前沿(英文)》 2011年 第5卷 第1期 页码 112-120 doi: 10.1007/s11709-010-0069-3
关键词: damage assessment decay ratio of acceleration signals (DRAS) wavelet transform (WT) modal analysis reinforced concrete beam beat phenomenon
《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
Control mode selection for modal control of long-span arch bridge
Zhengying LI, Zhengliang LI,
《结构与土木工程前沿(英文)》 2009年 第3卷 第4期 页码 401-406 doi: 10.1007/s11709-009-0052-z
关键词: selection reduced-order excitation long-span simplified
Experimental study of modal parameter identification in a simulated ambient-excited structure
JI Xiaodong, QIAN Jiaru, XU Longhe
《结构与土木工程前沿(英文)》 2007年 第1卷 第3期 页码 281-285 doi: 10.1007/s11709-007-0036-9
关键词: eigensystem realization eigen-sensitivity analysis realization algorithm vibration effective
Shape reconstruction of parallelogram flaw
ZHENG Gangfeng, WU Bin, HE Cunfu
《机械工程前沿(英文)》 2008年 第3卷 第1期 页码 17-22 doi: 10.1007/s11465-008-0015-4
关键词: approximation scatterer scattering problem information inverse
A method of analysis for modal aero-damping of vibrating blade in incompressible flow
Jun XING, Lin LI,
《能源前沿(英文)》 2009年 第3卷 第4期 页码 465-471 doi: 10.1007/s11708-009-0037-6
关键词: compressor different three-dimension analytical classical low-speed
连续非线性最优控制问题的勒让德—伽辽金逼近方法 Article
Xue-song CHEN
《信息与电子工程前沿(英文)》 2017年 第18卷 第10期 页码 1479-1487 doi: 10.1631/FITEE.1601101
关键词: 广义哈密尔顿—雅可比—贝尔曼方程;非线性最优控制;伽辽金逼近(Galerkin approximation);勒让德多项式(Legendre polynomials)
周义刚,曾卫东,俞汉清
《中国工程科学》 2001年 第3卷 第5期 页码 61-66
将坯料置于相变的临界点附近10~15℃加热、锻造、锻后水冷,随后,不是采用时效处理,而是先进行高温韧化再低温强化处理。近β锻造的组织不再是等轴α量过多,或是为零的网篮条状α的结构模式;而是约含20%等轴α、50%~60%条状α构成的网篮和β转变基体组成的三态组织。这种结构不仅丰富和发展了国 际上钛合金已有的4种组织类塑(等轴、双态、网篮和并列),而且将等轴和网篮组织的性能优势集于一身,由此带来的力学性能超过了国内外相关技术的性能水平:能在不降低塑性,不丧失热稳定性的条件下,提高材料的高温性能、低周疲劳性能和断裂韧性,在改善性能的同时提高使用温度。近β锻造适用于(α+β)型合金, 还可应用于α、近α和近β型合金,其研究成果已用于制造了多种发动机盘件、飞机和导弹等重要结构件。
标题 作者 时间 类型 操作
Numerical analysis and experimental investigation of modal properties for the gearbox in wind turbine
Pengxing YI,Peng HUANG,Tielin SHI
期刊论文
Experimental and computational validation of a scaled train tunnel model using modal analysis
Janice B. D’SOUZA, Sangarapillai KANAPATHIPILLAI
期刊论文
A case study on sample average approximation method for stochastic supply chain network design problem
Yuan WANG, Ruyan SHOU, Loo Hay LEE, Ek Peng CHEW
期刊论文
Variational mode decomposition based modal parameter identification in civil engineering
Mingjie ZHANG, Fuyou XU
期刊论文
Experimental study of structural damage identification based on modal parameters and decay ratio of acceleration
Zhigen WU, Guohua LIU, Zihua ZHANG
期刊论文
network for damage detection in functionally graded carbon nanotube-reinforced composite plates using modal
期刊论文
Experimental study of modal parameter identification in a simulated ambient-excited structure
JI Xiaodong, QIAN Jiaru, XU Longhe
期刊论文
A method of analysis for modal aero-damping of vibrating blade in incompressible flow
Jun XING, Lin LI,
期刊论文