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magnetic configuration effects on the edge heat flux in the limiter plasma on W7-X measured using the infrared camera and the combined probe

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Plasma Science and Technology 2018年第5期20卷 18-22页

作者： P DREWS H NIEmANN J COSFELD Y GAO J GEIGER O GRULKE m HENKEL D HOSCHEN K HOLLFELD C KILLER A KRAmER-FLECKEN Y LIANG S LIU D NICOLAI O NEUBAUER m rack B SCHWEER G SATHEESWARAN L RUDISCHHAUSER N SANDRI N WANG the W7-X Team Forschungszentrum Jtilich GmbH Institut fur Energie-und Klimaforschung PlasmaphysikPartner of the Trilateral Euregio Cluster(TEC)D-52425 JulichGermany max-Planck-Institut fur Plasmaphysik GreifswaldGermany Forschungszentrum Jtilich GmbH Central Institute for EngineeringElectronics and Analytics/Engineering and Technology(ZEA-1)D-52425 JulichGermany JARA-HPC Germany School of Electrical and Electronic Engineering Huazhong University of Science and TechnologyWuhan 430074People's Republic of China

Controlling the heat and particle fluxes in the plasma edge and on the plasma facing components is important for the safe and effective operation of every magnetically confined fusion *** was attempted on Wendelstein 7-X in the first operational campaign,with the modification of the magnetic configuration by use of the trim coils and tuning the field coil currents,commonly named iota ***,the heat loads on the five limiters are ***,they differ between each limiter and are non-uniform,due to the（relatively small） error fields caused by the misalignment of *** is therefore necessary to study the influence of the configuration changes on the transport of heat and particles in the plasma edge caused by the application of error fields and the change of the magnetic *** this paper the upstream measurements conducted with the combined probe are compared to the downstream measurements with the DIAS infrared camera on the limiter.

关键词： Wendelstein 7-X W7-X plasma edge heat flux limiter

Structural behavior of intermediate length cold-formed steel rack columns with C-stitches

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Frontiers of Structural and Civil Engineering 2019年第4期13卷 937-949页

作者： m. ANBARASU mahmud ASHRAF Department of Civil Engineering Government College of Engineering Salem 636011 India School of Engineering Deakin University Geelong VIC 3216 Australia

This article presents an experimental and numerical investigation on the strength and performance of intermediate length rack column sections with C-stitches under axial compression. The test program consisted of 10 axial concentric compression tests on columns with and without C-stitches under pin end conditions for two different geometric lengths. Finite element (FE) models were developed using commercial FE package ABAQUS considering material and geometric nonlinearities as well as initial geometric imperfections. The elastic buckling properties of the section were calculated using readily available linear elastic buckling analysis tools based on Generalized Beam Theory (GBT) and Finite Strip method (FSm). Obtained FE results were compared with those obtained experimentally, and once verified the developed FE modeling technique was used to carry out a parametric study to examine changes in structural response due to variations in length, depth and spacing of C-stitches. Observed influences of C-stitches on the behavior and resistance of the considered columns were carefully analyzed, and key design aspects are presented herein.

关键词： cold-formed steel columns C-stitches intermediate length columns distortional buckling

A compliant polymorphing wing for small UAVs

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Chinese Journal of Aeronautics 2020年第10期33卷 2575-2588页

作者： Sadique P.mUHAmmED Rafic m.AJAJ Kamran AKHAN Department of mechanical Engineering United Arab Emirates UniversityAl Ain 15551United Arab Emirates Department of Aerospace Engineering Khalifa University of Science and TechnologyAbu Dhabi 127788United Arab Emirates

This paper presents the development of a novel compliant polymorphing wing capable of chord and camber morphing for small *** morphing wing can achieve up to 10%chord extension and±20°camber *** design,modeling,sizing,manufacturing and mechanical testing of the wing are *** polymorphing wing consists of one continuous front spar fixed to the fuselage and a rear spar on each side of the *** rear spar can translate in the chordwise direction(chord morphing)and rotate around itself(camber morphing).A flexible elastomeric latex sheet is used as the skin to cover the wing and maintain its aerodynamic shape whilst allowing *** loads from the skin are transferred to the spars using the compliant cellular ribs that support the flexible skin and facilitate ***-tensioning is applied to the skin to minimize wrinkling when subject to aerodynamic and actuation loads.A rack and pinion actuation system,powered by stepper motors,is used for ***-structural design,analysis and sizing are *** comparison between the polymorphing wing and the baseline wing(non-morphing)shows that chord morphing improves aerodynamic efficiency at low angles of attack while camber morphing improves efficiency at high angles of attack.

关键词： Camber morphing Chord morphing Compliant structures Flexible skin UAVs

EVERY SEVERY SPEED BREAKER IS NOW A SOURCE OF POWER

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EVERY SEVERY SPEED BREAKER IS NOW A SOURCE OF POWER

Understanding the Noise Sources in a C-EPAS and Its mitigation

International Conference on Biology, Environment and Chemistry（ICBEC 2010）

作者： ASWATHAmAN.V PRIYADHARSHINI.m ELECTRONICS AND COmmUNICATION ENGINEERING SONA COLLEGE OF TECHNOLOGY

man in his lifetime,uses energy in one form or the *** fact whatever happens in nature,results,out of the conversion of energy in one form or the other? The blowing of the wind,the formation of the clouds and the flow of water are a few examples that stand testimony to this *** extensive usage of energy has resulted in an energy crisis,and there is a need to develop methods of optimal utilization,which will not only ease the crisis but also preserve the *** paper attempts to show how man has been utilizing energy and to explore prospects of optimizing the *** show that the world has already had its enough shares of its energy *** fuels pollute the *** energy requires careful handling of both raw as well as waste *** focus now is shifting more and more towards the renewable sources of energy,which are essentially,*** conservation is the cheapest new source of *** paper attempts to show how energy can be tapped and used at a commonly used system,the road-speed *** number of vehicles passing over the speed breaker in roads is increasing day by *** is possibility of tapping the energy and generating power by making the speed breaker as a power generation *** generated power can be used for the lamps near the speed breakers and this will be a great boon for the rural villages *** paper explains clearly,the working principle of the designed system,its practical implementation,and its *** of each component has been carried out using standard procedures,and the components have been fabricated and assembled.A similar model of the system has been modeled using *** testing of the system has been done with different loads at different *** the various criteria that determine the power generation,graphs have been *** utilization of energy is an indication of the growth of a *** might conclude that to be material

关键词： power generation,rack and pinion,energy conservation,rotation,speed breaker.

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Understanding the Noise Sources in a C-EPAS and Its Mitigati...

2014中国汽车工程学会年会

作者： Sista Subrahmanyam mala D m Ravi Yellajosula Tech mahindra（Shanghai） Corporation Ltd

The design of a low-cost Electric Power Assist Steering for the modern cars,including the HEVs and the EVs,presents a lot of *** the sources of noise,vibration and its effects will help designers to use the right control techniques for the EPAS motor *** designers are assisted to understand such sources of noise and fulfil some necessary corrections to minimize the noise.A typical EPAS system which adopts simple technique to identify and minimize such noise is *** also helps designer to link between various domains such as the mechanical field to magnetic field to electric field,which provides a clear understandings of what is creating what effect and discusses methods of minimizing the acoustic foot print The probable source of the audible noise emanating from the EPS column is when the system is maneuvered at a higher column *** system assembly need to be tested for variety of combinations to pin point the exact component responsible for noise and vibration at different speed（RPm） and torques（Nm）.Approach adopted is to correlate Noise（Audio） and Vibration data with the Phase Current in the Frequency Domain（FFT） to reduce the analysis overheads on tools and expensive analysis *** authors have a vast experience in the above subject and have used this simplified technique to practically solve a number of NVH,relating to C-EPAS,for low cost automotive segment

关键词： electric power steering noise and vibration torque sensor resolver RDC rack and pinion electronic control unit permanent magnet synchronous motor magnetic saturation torque ripple reduction.

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柱脚连接对柔性框架结构稳定性的影响

建筑钢结构进展 2007年第3期9卷 33-40页

作者：刘贤豪 BEALE R.G. GODLEY m.H.R. 科廷理工大学工程及科学学院牛津布鲁克斯大学机械工程系牛津布鲁克斯大学建筑环境学院

由冷成型钢加工而成的仓储货架经常被安装在楼板和柱子间没有任何实质连接的平坦楼板上。在过去的十年内,进行了许多钢及组合梁柱节点的研究,但是对于能够确保结构和基础连接的柱脚的研究则很少。柱脚的性能会对仓储货架的结构反应有很... 详细信息

由冷成型钢加工而成的仓储货架经常被安装在楼板和柱子间没有任何实质连接的平坦楼板上。在过去的十年内,进行了许多钢及组合梁柱节点的研究,但是对于能够确保结构和基础连接的柱脚的研究则很少。柱脚的性能会对仓储货架的结构反应有很大的影响。本文考察了柱脚连接的性能以及它们对于诸如仓储货架一样的柔性框架结构的整体稳定性的影响。识别了楼面连接从完全固接到铰接的转换条件。这些转换条件主要取决于荷载的特性以及结构的几何尺寸。通过采用一个计算机代数通用程序来计算承载力,对一个柔性门式刚架柱脚的转换条件进行了理论的研究。介绍了验证理论结果的一个试验方案。结果表明,理论值和试验值具有很好的相关性。还采用有限元分析对理论结果进行了验证。另外,还使用有限元分析的方法对多跨柔性框架结构的转换条件进行了推导。

关键词：柱脚连接框架稳定屈曲货架

DESIGN AND OPTImIZATION OF VISCOELASTIC DAmPING SYSTEm OF A PAYLOAD rack IN SPACECRAFT

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DESIGN AND OPTIMIZATION OF VISCOELASTIC DAMPING SYSTEM OF A ...

The Third International Conference on Dynamics, Vibration and Control

作者： S.m.Zhou~1 D.K.Li~1 and G.J.Tang~1 1 College of Aerospace and material Engineering National University of Defense Technology Changsha 410073 China

＜正＞A damping system consisted of turret viscoelastic damper was developed for use on a payload rack in spacecraft to reduce excessive acceleration and displacement response levels during *** turret viscoelastic damper assembly consists of base and cover into which are viscoelastic damping layer to metal bonded flexible units sandwiched in an angular disposition.

关键词： Passive damping viscoelastic damper finite element Payload rack

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海域天然气水合物保压取心钻具的研制与试验

钻探工程 2023年第6期50卷 18-26页

作者：卢春华张涛徐俊乔梦迪 Blinov.P.A 张思敏 merzliakov.m.U 中国地质大学(武汉)工程学院湖北武汉430074 湖北省城市地质工程院湖北武汉430050 圣彼得堡国立矿业大学俄罗斯圣彼得堡199006

天然气水合物的勘探和开发需要从地层中获取保压岩心进行地层的物化性测试、储量评估以及开采工艺等方面的研究。然而,钻探过程中,伴随温度和压力的改变,天然气水合物很容易发生分解,这给水合物钻探取心工作带来了很大的困难。为了解决... 详细信息

天然气水合物的勘探和开发需要从地层中获取保压岩心进行地层的物化性测试、储量评估以及开采工艺等方面的研究。然而,钻探过程中,伴随温度和压力的改变,天然气水合物很容易发生分解,这给水合物钻探取心工作带来了很大的困难。为了解决天然气水合物保压取心钻具的保压可靠性问题,开展了一种新型齿轮-齿条关闭球阀式水合物保压取心钻具的研制,采用绳索打捞的提拉力驱动球阀工作。详细介绍了该保压取心钻具的结构和工作原理;计算了球阀的工作密封比压及打捞内管所需的提拉力;介绍了该保压取心钻具的室内试验和海试情况。研究表明:该水合物保压取心钻具的取心工艺简单、球阀翻转和密封性能良好、取心成功率高,各项功能和性能指标均达到了设计的要求。

关键词：天然气水合物保压取心钻具齿轮-齿条球阀海试

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