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Pengxing YI,Lijian DONG,Tielin SHI
《机械工程前沿(英文)》 2014年 第9卷 第4期 页码 354-367 doi: 10.1007/s11465-014-0319-5
To improve the dynamic performance and reduce the weight of the planet carrier in wind turbine gearbox, a multi-objective optimization method, which is driven by the maximum deformation, the maximum stress and the minimum mass of the studied part, is proposed by combining the response surface method and genetic algorithms in this paper. Firstly, the design points’ distribution for the design variables of the planet carrier is established with the central composite design (CCD) method. Then, based on the computing results of finite element analysis (FEA), the response surface analysis is conducted to find out the proper sets of design variable values. And a multi-objective genetic algorithm (MOGA) is applied to determine the direction of optimization. As well, this method is applied to design and optimize the planet carrier in a 1.5 MW wind turbine gearbox, the results of which are validated by an experimental modal test. Compared with the original design, the mass and the stress of the optimized planet carrier are respectively reduced by 9.3% and 40%. Consequently, the cost of planet carrier is greatly reduced and its stability is also improved.
关键词: planet carrier multi-objective optimization genetic algorithms wind turbine gearbox modal experiment
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
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
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
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。
Design and experiment of a novel pneumatic soft arm based on a deployable origami exoskeleton
《机械工程前沿(英文)》 2023年 第18卷 第4期 doi: 10.1007/s11465-023-0770-2
关键词: pneumatic soft arm soft airbag deployable origami exoskeleton bistable characteristics cargo-loading capacity
《环境科学与工程前沿(英文)》 2023年 第17卷 第11期 doi: 10.1007/s11783-023-1734-9
● Photochemical conversion of chlorobenzene (CB) on α-Fe2O3 was evaluated.
关键词: Photochemical conversion Chlorobenzene α-Fe2O3 PCDD/Fs Mineral particulate
Biaxial tensile-compressive experiment of concrete at high temperatures
SONG Yupu, ZHANG Zhong, QING Likun, YU Changjiang
《结构与土木工程前沿(英文)》 2007年 第1卷 第1期 页码 94-98 doi: 10.1007/s11709-007-0009-z
关键词: increase Offshore Engineering temperature relationship addition
基于对齐自修正的鲁棒跨模态检索 Research Article
郭金一1,丁洁玉2
《信息与电子工程前沿(英文)》 2023年 第24卷 第10期 页码 1403-1415 doi: 10.1631/FITEE.2200514
Yong SHUAI, Xinlin XIA, Heping TAN
《能源前沿(英文)》 2010年 第4卷 第4期 页码 488-495 doi: 10.1007/s11708-010-0007-z
关键词: Monte Carlo method solar energy radiation performance cavity receiver
标题 作者 时间 类型 操作
Multi-objective genetic algorithms based structural optimization and experimental investigation of the planet carrier in wind turbine gearbox
Pengxing YI,Lijian DONG,Tielin SHI
期刊论文
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
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
Atmospheric heterogeneous reaction of chlorobenzene on mineral -FeO particulates: a chamber experiment
期刊论文
Biaxial tensile-compressive experiment of concrete at high temperatures
SONG Yupu, ZHANG Zhong, QING Likun, YU Changjiang
期刊论文