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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
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
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
A fully solid-state cold thermal energy storage device for car seats using shape-memory alloys
《能源前沿(英文)》 2023年 第17卷 第4期 页码 504-515 doi: 10.1007/s11708-022-0855-3
关键词: shape-memory alloy (SMA) elastocaloric effect (eCE) cooled seat cold thermal energy storage
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。
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
珊瑚岛礁环境噪声成像 Article
夏少红, 张昌榕, 曹敬贺
《工程(英文)》 2023年 第25卷 第6期 页码 182-193 doi: 10.1016/j.eng.2021.09.022
As valuable land in the ocean, coral islands are not only important bases for making use of marine resources and protecting marine rights and interests, but also important for breakthrough research in many fields of earth science. Hence, the economical and efficient determination of the underground structure of coral islands has become significant in coral island engineering geology, but remains challenging for traditional marine geophysical prospecting and drilling methods. While ambient noise tomography with dense arrays has been widely used in continental regions, its applicability to coral islands remains undetermined. In this study, based on the data recorded by a dense array on an isolated coral island in the South China Sea, we analyzed the ambient noise characteristics and obtained a 3D subsurface structure of the coral island using ambient noise tomography. We made the following findings: ① The ambient noise frequencies can be roughly categorized into three levels: < 1, 1–5, and > 5 Hz. The spectral characteristics of the noise below 5 Hz were consistent at different stations, but there were significant differences in the characteristics of the noise above 5 Hz. ② For ambient noise frequencies below 5 Hz, cross-correlation functions with high quality could be obtained with only 24 h of waveform data. However, it was difficult to extract meaningful cross-correlation functions for ambient noise frequencies above 5 Hz. ③ The S-wave velocity in the coral island was higher toward the sea and lower toward the lagoon, which was consistent with the high degree of cementation of the outer reef flat stratum on the seaward side. ④ There were two low-velocity horizons at 25–75 and 200–300 m, which were in good agreement with the high-porosity horizons that were revealed by drilling core samples, reflecting the weathering history of the reef. Our research demonstrates that ambient noise tomography is a potentially economical, efficient, and environmentally friendly method for the geological prospecting of coral reefs.
关键词: Coral island Ambient noise tomography Engineering geology South China Sea
Investigation of flow dynamics and decrease of vortex noise inside volute of centrifugal fans
LI Chunxi, WANG Songling
《能源前沿(英文)》 2008年 第2卷 第2期 页码 235-240 doi: 10.1007/s11708-008-0040-3
关键词: cylinder-shaped evolution computational effective large-scale
Integrated virtual-design methods for forecasting radiated noise of single cylinder diesel block
GUO Lei, HAO Zhiyong, XU Hongmei, LIU Lianyun
《能源前沿(英文)》 2008年 第2卷 第4期 页码 416-421 doi: 10.1007/s11708-008-0097-z
关键词: bearing dynamical frequency response dynamical simulation hybrid dynamical
Min-Ho CHEY, Jae-Ung KIM
《结构与土木工程前沿(英文)》 2012年 第6卷 第3期 页码 267-280 doi: 10.1007/s11709-012-0170-x
关键词: tuned mass damper parametric optimization passive control white noise earthquake excitation
Multi-UAV cooperative target tracking with bounded noise for connectivity preservation
Rui Zhou, Yu Feng, Bin Di, Jiang Zhao, Yan Hu,jzhao@buaa.edu.cn
《信息与电子工程前沿(英文)》 2020年 第21卷 第10期 页码 1413-1534 doi: 10.1631/FITEE.1900617
Numerical analysis of aerodynamic noise radiated from cross flow fan
CHEN Anbang, LI Song, HUANG Dongtao
《能源前沿(英文)》 2008年 第2卷 第4期 页码 443-447 doi: 10.1007/s11708-008-0063-9
关键词: predicted aerodynamic Williams-Hawkings calculated pressure aerodynamic performance unsteady Reynolds-averaged
Air-borne noise of thermal module and system for notebook personal computers: experimental study
SHI Junye, JIANG Cailing, QIAO Junsheng, CHEN Jiangpin, LI Xiaoping, ZHANG Xiaojun
《能源前沿(英文)》 2008年 第2卷 第2期 页码 174-178 doi: 10.1007/s11708-008-0034-1
关键词: air-borne attention propagating characteristic personal computer
3D finite element analysis of composite noise barrier constructed of polyurethane products
Ben DAEE,Hesham El NAGGAR
《结构与土木工程前沿(英文)》 2017年 第11卷 第1期 页码 100-110 doi: 10.1007/s11709-016-0364-8
关键词: 3D finite element sound wall rigid polyurethane foam poly-wall numerical model calibration
Embracing digital mindsets to ensure a sustainable future
《环境科学与工程前沿(英文)》 2023年 第18卷 第3期 doi: 10.1007/s11783-024-1799-0
关键词: Wildlife Climate Change Heavy metals Noise LAN Light pollution
标题 作者 时间 类型 操作
Design of noise-reduction seats for high-speed trains
Xiaojun DENG, Yanju ZHAO, Haijin ZHANG, Renzhong SHUAI, Leiwei ZHU
期刊论文
Application of python-based Abaqus preprocess and postprocess technique in analysis of gearbox vibration and noisereduction
Guilian YI, Yunkang SUI, Jiazheng DU
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
Anovel approach of noise statistics estimate using H∞ filter in target tracking
Xie WANG,Mei-qin LIU,Zhen FAN,Sen-lin ZHANG
期刊论文
Investigation of flow dynamics and decrease of vortex noise inside volute of centrifugal fans
LI Chunxi, WANG Songling
期刊论文
Integrated virtual-design methods for forecasting radiated noise of single cylinder diesel block
GUO Lei, HAO Zhiyong, XU Hongmei, LIU Lianyun
期刊论文
of structural responses using an optimal passive tuned mass damper under stationary Gaussian white noise
Min-Ho CHEY, Jae-Ung KIM
期刊论文
Multi-UAV cooperative target tracking with bounded noise for connectivity preservation
Rui Zhou, Yu Feng, Bin Di, Jiang Zhao, Yan Hu,jzhao@buaa.edu.cn
期刊论文
Numerical analysis of aerodynamic noise radiated from cross flow fan
CHEN Anbang, LI Song, HUANG Dongtao
期刊论文
Air-borne noise of thermal module and system for notebook personal computers: experimental study
SHI Junye, JIANG Cailing, QIAO Junsheng, CHEN Jiangpin, LI Xiaoping, ZHANG Xiaojun
期刊论文
3D finite element analysis of composite noise barrier constructed of polyurethane products
Ben DAEE,Hesham El NAGGAR
期刊论文