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Guilian YI, Yunkang SUI, Jiazheng DU
《机械工程前沿(英文)》 2011年 第6卷 第2期 页码 229-234 doi: 10.1007/s11465-011-0128-z
To reduce vibration and noise, a damping layer and constraint layer are usually pasted on the inner surface of a gearbox thin shell, and their thicknesses are the main parameters in the vibration and noise reduction design. The normal acceleration of the point on the gearbox surface is the main index that can reflect the vibration and noise of that point, and the normal accelerations of different points can reflect the degree of the vibration and noise of the whole structure. The K-S function is adopted to process many points’ normal accelerations as the comprehensive index of the vibration characteristics of the whole structure, and the vibration acceleration level is adopted to measure the degree of the vibration and noise. Secondary development of the Abaqus preprocess and postprocess on the basis of the Python scripting programming automatically modifies the model parameters, submits the job, and restarts the analysis totally, which avoids the tedious work of returning to the Abaqus/CAE for modifying and resubmitting and improves the speed of the preprocess and postprocess and the computational efficiency.
关键词: Abaqus secondary development Python language vibration and noise reduction K-S function vibration acceleration level
Design of noise-reduction seats for high-speed trains
Xiaojun DENG, Yanju ZHAO, Haijin ZHANG, Renzhong SHUAI, Leiwei ZHU
《机械工程前沿(英文)》 2018年 第13卷 第3期 页码 385-389 doi: 10.1007/s11465-017-0438-x
Noise-reduction seats have been successfully used in concert halls, theaters, and other places that reduce noise. In this study, a new noise-reduction seat design was proposed for high-speed trains, which have unique interior noise spectral characteristics. First, before the noise-reduction seat models were fabricated, the parameters of high-performance sound-absorbing materials and perforated plates were selected by conducting a standing-wave tube test. The sound-absorption effects of the noise-reduction seats and normal seats were investigated and compared in a reverberation chamber. Test results showed that, compared with normal seats, the noise-reduction seats obtained a significantly improved sound-absorption coefficient in the entire frequency band. Furthermore, the test results were used to establish a simulation model for calculation, and the simulation results proved that the noise-reduction seats substantially reduced the noise in an entire train car. Finally, the noise-reduction seats were fabricated and installed in a full train car of an actual high-speed train. The test results showed that, compared with the normal seats, the noise-reduction seats decreased the noise level at a standard point in the passenger car by 1.5 dB. Therefore, the noise-reduction seats are effective in noise reduction.
关键词: high-speed train sound-absorbing materials perforated board noise-reduction seats
杨建文,贾民平,许飞云,胡建中
《中国工程科学》 2005年 第7卷 第8期 页码 66-69
分析了经验模式分解的滤波性能;针对旋转机械振动信号信噪比低及非平稳特性,应用经验模式分解对振动信号进行降噪处理,突出了有用振动信号,为旋转机械在线监测和故障诊断提供了有效的依据;仿真实验及真实数据分析表明,经验模式分解在振动信号降噪处理中是有效的,为振动信号分析提供了新的方法。
Neural network control for earthquake structural vibration reduction using MRD
Khaled ZIZOUNI, Leyla FALI, Younes SADEK, Ismail Khalil BOUSSERHANE
《结构与土木工程前沿(英文)》 2019年 第13卷 第5期 页码 1171-1182 doi: 10.1007/s11709-019-0544-4
关键词: MR damper semi-active control earthquake vibration neural network linear quadratic control
Frequency domain a9ctive vibration control of a flexible plate based on neural networks
Jinxin LIU, Xuefeng CHEN, Zhengjia HE
《机械工程前沿(英文)》 2013年 第8卷 第2期 页码 109-117 doi: 10.1007/s11465-013-0252-z
A neural-network (NN)-based active control system was proposed to reduce the low frequency noise radiation of the simply supported flexible plate. Feedback control system was built, in which neural network controller (NNC) and neural network identifier (NNI) were applied. Multi-frequency control in frequency domain was achieved by simulation through the NN-based control systems. A pre-testing experiment of the control system on a real simply supported plate was conducted. The NN-based control algorithm was shown to perform effectively. These works lay a solid foundation for the active vibration control of mechanical structures.
关键词: active vibration control (AVC) neural network (NN) low frequency noise frequency domain control multi-frequency control
Hassan YOUSEFI, Alireza TAGHAVI KANI, Iradj MAHMOUDZADEH KANI, Soheil MOHAMMADI
《结构与土木工程前沿(英文)》 2020年 第14卷 第2期 页码 446-472 doi: 10.1007/s11709-019-0605-8
关键词: ambient vibration test high level noise iterative signal enhancement wavelet cross and autocorrelation of wavelets
谢溪凌,董广明 ,林枫 ,张志谊 ,闻雪友
《中国工程科学》 2022年 第24卷 第6期 页码 193-202 doi: 10.15302/J-SSCAE-2022.06.018
Noise reduction for centrifugal fan with non-isometric forward-swept blade impeller
MA Jianfeng, QI Datong, MAO Yijun
《能源前沿(英文)》 2008年 第2卷 第4期 页码 433-437 doi: 10.1007/s11708-008-0082-6
关键词: different reference aerodynamic performance centrifugal impeller
De-noising of diesel vibration signal using wavelet packet and singular value decomposition
DUAN Li-xiang, ZHANG Lai-bin, WANG Zhao-hui
《机械工程前沿(英文)》 2006年 第1卷 第4期 页码 443-447 doi: 10.1007/s11465-006-0055-6
关键词: coefficient de-noised cylinder signal-to-noise wavelet decomposition
Seismic response reduction of a three-story building by an MR grease damper
Tomoki SAKURAI, Shin MORISHITA
《机械工程前沿(英文)》 2017年 第12卷 第2期 页码 224-233 doi: 10.1007/s11465-017-0413-6
This paper describes an application of magneto-rheological (MR) grease dampers as seismic dampers for a three-story steel structure. MR fluid is widely known as a smart material with rheological properties that can be varied by magnetic field strength. This material has been applied to various types of devices, such as dampers, clutches, and engine mounts. However, the ferromagnetic particles dispersed in MR fluid settle out of the suspension after a certain interval because of the density difference between the particles and their carrier fluid. To overcome this defect, we developed a new type of controllable working fluid using grease as the carrier of magnetic particles. MR grease was introduced into a cylindrical damper, and the seismic performance of the damper was subsequently studied via numerical analysis. The analysis results of the MR grease damper were compared with those of other seismic dampers. We confirmed that the MR grease damper is an effective seismic damper.
关键词: MR grease damper seismic damper vibration control structural response FEM analysis
He XIA, Fei GAO, Xuan WU, Nan ZHANG, Guido DE ROECK, Geert DEGRANDE
《结构与土木工程前沿(英文)》 2009年 第3卷 第1期 页码 9-17 doi: 10.1007/s11709-009-0010-9
关键词: railway elevated structure bridge station vibration noise environment
《机械工程前沿(英文)》 2023年 第18卷 第1期 doi: 10.1007/s11465-022-0730-2
关键词: ultrasonic vibration-assisted grinding perforated ultrasonic vibration platform vibration characteristics apparent elasticity method grinding force surface integrity
Recent development of vibration utilization engineering
WEN Bangchun
《机械工程前沿(英文)》 2008年 第3卷 第1期 页码 1-9 doi: 10.1007/s11465-008-0017-2
关键词: utilization engineering non-linear vibration vibration utillization utillization engineering
Anovel approach of noise statistics estimate using H∞ filter in target tracking
Xie WANG,Mei-qin LIU,Zhen FAN,Sen-lin ZHANG
《信息与电子工程前沿(英文)》 2016年 第17卷 第5期 页码 449-457 doi: 10.1631/FITEE.1500262
标题 作者 时间 类型 操作
Application of python-based Abaqus preprocess and postprocess technique in analysis of gearbox vibrationand noise reduction
Guilian YI, Yunkang SUI, Jiazheng DU
期刊论文
Design of noise-reduction seats for high-speed trains
Xiaojun DENG, Yanju ZHAO, Haijin ZHANG, Renzhong SHUAI, Leiwei ZHU
期刊论文
Neural network control for earthquake structural vibration reduction using MRD
Khaled ZIZOUNI, Leyla FALI, Younes SADEK, Ismail Khalil BOUSSERHANE
期刊论文
Frequency domain a9ctive vibration control of a flexible plate based on neural networks
Jinxin LIU, Xuefeng CHEN, Zhengjia HE
期刊论文
data enhancement for implementation in purification of modal frequency for extremely noisy ambient vibration
Hassan YOUSEFI, Alireza TAGHAVI KANI, Iradj MAHMOUDZADEH KANI, Soheil MOHAMMADI
期刊论文
Noise reduction for centrifugal fan with non-isometric forward-swept blade impeller
MA Jianfeng, QI Datong, MAO Yijun
期刊论文
De-noising of diesel vibration signal using wavelet packet and singular value decomposition
DUAN Li-xiang, ZHANG Lai-bin, WANG Zhao-hui
期刊论文
Seismic response reduction of a three-story building by an MR grease damper
Tomoki SAKURAI, Shin MORISHITA
期刊论文
Running train induced vibrations and noises of elevated railway structures and their influences on environment
He XIA, Fei GAO, Xuan WU, Nan ZHANG, Guido DE ROECK, Geert DEGRANDE
期刊论文
Vibration characteristics and machining performance of a novel perforated ultrasonic vibration platform
期刊论文