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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
From dBA to soundscape indices: Managing our sound environment
Jian KANG
《工程管理前沿(英文)》 2017年 第4卷 第2期 页码 184-192 doi: 10.15302/J-FEM-2017026
关键词: noise soundscape management sound environment soundscape index
Characteristics and application of road absorbing solar energy
Zhihua ZHOU, Shan HU, Xiaoyan ZHANG, Jian ZUO
《能源前沿(英文)》 2013年 第7卷 第4期 页码 525-534 doi: 10.1007/s11708-013-0278-2
关键词: solar energy road-solar energy system road surface temperature solar absorptivity of road surface solar collector efficiency of system
Preparation of solar selective absorbing CuO coating for medium temperature application
HUANG Qunwu, WANG Yiping, LI Jinhua
《化学科学与工程前沿(英文)》 2007年 第1卷 第3期 页码 256-260 doi: 10.1007/s11705-007-0046-0
关键词: photoelectron spectroscopy temperature pretreatment absorptivity microscopy
Zeshao CHEN, Songping MO, Peng HU, Shouli JIANG, Gang WANG, Xiaofang CHENG,
《能源前沿(英文)》 2010年 第4卷 第3期 页码 301-305 doi: 10.1007/s11708-010-0006-0
关键词: radiative heat transfer entropy generation exergy thermodynamics
From understanding to designing soundscapes
Jian KANG
《结构与土木工程前沿(英文)》 2010年 第4卷 第4期 页码 403-417 doi: 10.1007/s11709-010-0091-5
姚昊萍,张建润,陈南,孙庆鸿
《中国工程科学》 2007年 第9卷 第3期 页码 41-46
利用汉密尔顿函数和瑞利-李兹方法,建立了分别由1块四边弹性支承的弹性板及5块刚性板构成 的两连接封闭矩形腔外的辐射声场模型,推导了腔体外辐射声场的解析解。模型在两个弹性长方体结构的连接 处施加假想的弹簧系统模拟不同连接条件,同时考虑了两弹性结构连接点之间以及弹性板与腔体内声场之间的 耦合。通过算例表明,间接力通过连接结构对弹性板辐射声场的影响明显小于弹性板在同样直接力作用下的辐 射声场;弹性结构连接点处线弹簧的刚度变化对辐射声场的影响较旋转弹簧大。
Noise control technology for generator sets in enclosures
ZHANG Nailong, YANG Wentong, FEI Renyuan
《机械工程前沿(英文)》 2008年 第3卷 第4期 页码 377-384 doi: 10.1007/s11465-008-0051-0
关键词: equipment generator sound-attenuated enclosure convenient Enclosure development
基于到达时间差和到达频率差的多层等梯度声速剖面建模与声学定位 Research Article
詹东洲1,王思甜1,蔡守桂1,郑华荣2,徐文2
《信息与电子工程前沿(英文)》 2023年 第24卷 第1期 页码 164-175 doi: 10.1631/FITEE.2100398
《化学科学与工程前沿(英文)》 2022年 第16卷 第8期 页码 1237-1246 doi: 10.1007/s11705-022-2140-8
关键词: melamine sponge oil-absorbing material hydrophobic oil-water separation oil absorption capacity
于翘
《中国工程科学》 1999年 第1卷 第3期 页码 1-4
在不少场合下,航天用工程材料处在极端条件下工作,这就对材料提出许多特殊的要求,虽然国内外有一定的研究积累,但对更精确的模型和符合特定材料的损伤的状态方程,有待深一步研究。如高级弹头再入时气动加热和粒子云侵蚀以及两者耦合效应引起弹头防护材料增大后退量的问题;空中垃圾和微流星的高速碰撞对航天器的威胁;特别是核爆和激光武器对材料的损伤和破坏,实质上是辐射引起的热击波层裂破坏,这些都属于超高速碰撞对材料的响应问题。天线罩材料、吸波材料、红外隐身材料、电磁屏蔽材料都是具有不同波长电磁波的电磁功能材料,它们对固体介质的穿透、吸收、反射等会产生响应,不同的电磁功能材料,其宏观性能的物理参量不同,但有几个参量是通用的,如介电常数、磁导率和损耗角正切,搞清这些参量与材料微观结构的关系,可以为材料设计和材料创新提供科学依据。
谭新建,欧阳晓平,王群书
《中国工程科学》 2009年 第11卷 第8期 页码 48-51
理论分析计算的基础上,提出了基于康普顿效应的散射吸收探测方法,该方法能实现高低能γ灵敏度比值达106~108,且对高能γ灵敏度较大,为10-21~10-16 C·cm2,其性能指标在一定程度上优于目前使用的基于磁分析器与Cherenkov探测器的高能γ探测方法指标。
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
Hierarchically porous zeolites synthesized with carbon materials as templates
《化学科学与工程前沿(英文)》 2021年 第15卷 第6期 页码 1444-1461 doi: 10.1007/s11705-021-2090-6
关键词: hierarchical zeolites carbon materials direct templates indirect templates carbon-silica composites
Influence of envelope insulation materials on building energy consumption
Junlan YANG, Jiabao TANG
《能源前沿(英文)》 2017年 第11卷 第4期 页码 575-581 doi: 10.1007/s11708-017-0473-7
关键词: building envelope insulation materials energy consumption payback time
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
Characteristics and application of road absorbing solar energy
Zhihua ZHOU, Shan HU, Xiaoyan ZHANG, Jian ZUO
期刊论文
Preparation of solar selective absorbing CuO coating for medium temperature application
HUANG Qunwu, WANG Yiping, LI Jinhua
期刊论文
Entropy flow, entropy generation, exergy flux, and optimal absorbing temperature in radiative transfer
Zeshao CHEN, Songping MO, Peng HU, Shouli JIANG, Gang WANG, Xiaofang CHENG,
期刊论文
Noise control technology for generator sets in enclosures
ZHANG Nailong, YANG Wentong, FEI Renyuan
期刊论文
Preparation and properties of a silver particle-coated and 1-dodecanethiol-modified superhydrophobic melamine sponge for oil/water separation
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