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A wind tunnel study on control methods for cable dry-galloping
Hung D. VO,Hiroshi KATSUCHI,Hitoshi YAMADA,Mayuko NISHIO
《结构与土木工程前沿(英文)》 2016年 第10卷 第1期 页码 72-80 doi: 10.1007/s11709-015-0309-7
关键词: dry-galloping wind-relative angle single spiral wire double spiral wire circular rings
《化学科学与工程前沿(英文)》 页码 1672-1680 doi: 10.1007/s11705-022-2205-8
关键词: stainless steel wire mesh computational fluid dynamics surface wettability liquid film impacting
Processing of high-precision ceramic balls with a spiral V-groove plate
Ming FENG,Yongbo WU,Julong YUAN,Zhao PING
《机械工程前沿(英文)》 2017年 第12卷 第1期 页码 132-142 doi: 10.1007/s11465-017-0436-z
As the demand for high-performance bearings gradually increases, ceramic balls with excellent properties, such as high accuracy, high reliability, and high chemical durability used, are extensively used for high-performance bearings. In this study, a spiral V-groove plate method is employed in processing high-precision ceramic balls. After the kinematic analysis of the ball-spin angle and enveloped lapping trajectories, an experimental rig is constructed and experiments are conducted to confirm the feasibility of this method. Kinematic analysis results indicate that the method not only allows for the control of the ball-spin angle but also uniformly distributes the enveloped lapping trajectories over the entire ball surface. Experimental results demonstrate that the novel spiral V-groove plate method performs better than the conventional concentric V-groove plate method in terms of roundness, surface roughness, diameter difference, and diameter decrease rate. Ceramic balls with a G3-level accuracy are achieved, and their typical roundness, minimum surface roughness, and diameter difference are 0.05, 0.0045, and 0.105 mm, respectively. These findings confirm that the proposed method can be applied to high-accuracy and high-consistency ceramic ball processing.
关键词: bearing ceramic ball spiral V-groove kinematic analysis trajectory
Elevated temperature creep model of parallel wire strands
《结构与土木工程前沿(英文)》 页码 1060-1071 doi: 10.1007/s11709-023-0981-y
关键词: parallel wire strands experimental study elevated temperature creep model
Zhenyun DUAN, Houjun CHEN, Zhilan JU, Jian LIU
《机械工程前沿(英文)》 2012年 第7卷 第3期 页码 312-321 doi: 10.1007/s11465-012-0308-5
In this paper, loxodromic-type normal circular-arc spiral bevel gear is proposed as a novel application of the circular-arc tooth profile at the gear transmission with intersecting axes. Based on the principle of molding-surface conjugation, the study develops a mathematical model for the tooth alignment curve and the computational flow at the design stage to enable the generation of the tooth surface. Machining of the tooth surface is then carried out to determine the interference-free tool path of the numerical control (NC). Moreover, a pair of loxodromic-type normal circular-arc spiral bevel gears is manufactured on computer numerical control (CNC) machine tools. The proposed theory and method are experimentally investigated, and the obtained results primarily reflect the superior performance of the proposed novel gear.
关键词: loxodrome circular-arc tooth profile Wildhaber-Novikov (W-N) gear spiral bevel gear
Satoshi KANECO, Hiroaki KITANAGA, Hideyuki KATSUMATA, Tohru SUZUKI
《化学科学与工程前沿(英文)》 2012年 第6卷 第4期 页码 432-435 doi: 10.1007/s11705-012-1219-z
关键词: preconcentration adsorption onto niobium wire electrothermal atomization atomic absorption spectrometry tungsten tube atomizer trace elements
戴会超,彭澎
《中国工程科学》 2004年 第6卷 第2期 页码 33-37
长江三峡水利枢纽工程建设中重大技术问题的决策是建立在大量科学试验和专家论证的基础上,三峡工程水电站压力管道和蜗壳技术结构型式的选择不仅是重大的技术经济问题,也是关系水电站长期运行问题,文章介绍了三峡工程水电站压力管道和蜗壳技术型式选择及决策。
黄锐
《中国工程科学》 2008年 第10卷 第11期 页码 43-46
针对冷却塔中螺旋结构类型的气液交换塔,提出其内部螺旋塔板形状的设计方法,包括塔壁上外螺旋线和塔中心轴管上内螺旋线的位置确定,以及两线之间螺旋曲面板在平面上的拓扑尺寸。通过塔的几何参数确定螺旋曲面板设计的关键参数,可实现扭曲状塔板与塔壁及内轴的准确配合。
Experimental study on wire breakage detection by acoustic emission
Limin SUN, Ji QIAN
《结构与土木工程前沿(英文)》 2011年 第5卷 第4期 页码 503-509 doi: 10.1007/s11709-011-0132-8
关键词: acoustic emission (AE) waveform wire breakage attenuation factor wave velocity
王金生,姚春燕,彭伟,金鑫, 陈世杰
《中国工程科学》 2012年 第14卷 第11期 页码 94-98
游离磨料线锯切割是将磨浆中的磨粒通过一定速度的细钢丝线带入切割区域,达到去除工件材料的目的。多股线由多根细金属线绕制而成,表面具有很多凹槽,与钢丝线光滑表面相比,可以输送更多的磨粒进入切割区域,从而提高切割效率。应用0.25 mm的多股线和0.25 mm的钢丝线对光学玻璃K9进行切割对比实验,结果表明,在相同工艺条件下,多股线的切割效率和表面粗糙度均优于钢丝线,但切缝宽度大于钢丝线。
Pravin Kumar Venkat Rao PADALU; Yogendra SINGH
《结构与土木工程前沿(英文)》 2022年 第16卷 第4期 页码 478-505 doi: 10.1007/s11709-022-0817-1
关键词: unreinforced masonry seismic in-plane and out-of-plane forces pier analysis finite element modelling splint and bandage technique with wire mesh
Zilin HUANG,Gang WANG,Shaopeng WEI,Changhong LI,Yiming RONG
《机械工程前沿(英文)》 2016年 第11卷 第3期 页码 242-249 doi: 10.1007/s11465-016-0397-7
Laser hot wire cladding, with the prominent features of low heat input, high energy efficiency, and high precision, is widely used for remanufacturing metal parts. The cladding process, however, needs to be improved by using a quantitative method. In this work, volumetric defect ratio was proposed as the criterion to describe the integrity of forming quality for cladding layers. Laser deposition experiments with FV520B, one of martensitic stainless steels, were designed by using the Taguchi method. Four process variables, namely, laser power (P), scanning speed (Vs), wire feed rate (Vf), and wire current (I), were optimized based on the analysis of signal-to-noise (S/N) ratio. Metallurgic observation of cladding layer was conducted to compare the forming quality and to validate the analysis method. A stable and continuous process with the optimum parameter combination produced uniform microstructure with minimal defects and cracks, which resulted in a good metallurgical bonding interface.
关键词: process optimization Taguchi method signal-to-noise (S/N) ratio volumetric defect ratio laser hot wire cladding
王裕清,梁剑
《中国工程科学》 2001年 第3卷 第12期 页码 68-70
曲面上点的主曲率计算是确定轮齿啮合压痕平面投影形状的关键。文章摈弃通常运用啮合原理和坐标变换计算的思路,从曲面本身的性质出发,把幺正活动标架和外微分引入主曲率计算,得到简明、有效的主曲率计算的新算法,并结合压痕公式给出了一个应用实例。该算法可以推广到任意曲面的主曲率计算。
李再光,龚威
《中国工程科学》 2001年 第3卷 第1期 页码 58-61
现有的工业CO2激光器,主要为横流、纵流和扩散冷却三种。文章提出一种新型激光器,即圆形金属腔CO2激光器。该激光器的腔体由多个等距、同轴安装的金属腔单元组成。每个腔单元有多个流道,放电在流道与腔体接口处产生,气流将放电及被其激活的粒子吹人腔内,形成增益,输出激光。文章研究了电极结构,金属腔壁对工作气体的冷却作用和腔内的增益分布。研究结果表明:多通道放电吹入和腔内旋流,有利于腔内的均匀放电;金属腔壁有利于腔内对流冷却,降低对气流速度的要求,从而缩小激光器的体积。相邻的腔单元相对转动适当角度,可以提高腔内增益分布的圆周均匀性,从而获得光束质量好的激光束。
TANG Renhu, YIN Fei, WANG Haijun, CHEN Tingkuan
《能源前沿(英文)》 2007年 第1卷 第3期 页码 300-304 doi: 10.1007/s11708-007-0043-5
关键词: m · diameter critical pressure sub-critical pressure maximum
标题 作者 时间 类型 操作
A wind tunnel study on control methods for cable dry-galloping
Hung D. VO,Hiroshi KATSUCHI,Hitoshi YAMADA,Mayuko NISHIO
期刊论文
Numerical studies of dynamic behavior of liquid film on single-layer wire mesh with different wettabilities
期刊论文
Processing of high-precision ceramic balls with a spiral V-groove plate
Ming FENG,Yongbo WU,Julong YUAN,Zhao PING
期刊论文
Mathematical model and manufacture programming of loxodromic-type normal circular-arc spiral bevel gear
Zhenyun DUAN, Houjun CHEN, Zhilan JU, Jian LIU
期刊论文
Preconcentration of trace elements by adsorption onto a niobium wire for electrothermal atomization atomic
Satoshi KANECO, Hiroaki KITANAGA, Hideyuki KATSUMATA, Tohru SUZUKI
期刊论文
evaluation methodology for masonry building and retrofitting using splint and bandage technique with wire
Pravin Kumar Venkat Rao PADALU; Yogendra SINGH
期刊论文
Process improvement in laser hot wire cladding for martensitic stainless steel based on the Taguchi method
Zilin HUANG,Gang WANG,Shaopeng WEI,Changhong LI,Yiming RONG
期刊论文