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Information Monitoring Technology for support structure of Railway Tunnel During Operation

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Structural Durability & Health Monitoring 2018年第1期12卷 35-50页

作者： Licai Zhao Shishuen Chen Department of Civil and Construction Engineering National Taiwan University of Science and TechnologyTaiwanTaipei10607

In the process of railway construction, because of the inconvenience ofgeological condition, water bursting and mud surging happen frequently, and the laterdeformation of support structure on the happening geology section would threaten thenormal running of railway. The limit difference of deformation control value of thesupport structure section where geological accidents frequently happen, is small, andartificial half-automatic supervisory technology cannot get the health condition of tunnelin time, resulting many cars speed-down accidents due to deformation of supportstructure. Through design innovation, we introduce TGMIS in the later period ofYanzishan railway construction to quickly capture the deformation of support structure,the strain of lining concrete, the strain of steel frame, stress of surrounding soil, stress ofsurrounding water, strain of second lining steel bar and other situ data. Also we setobservation prism and measuring robot device in specific position inside tunnel, androbot laser locator laser spot is projected onto reflection target surface, by graphicprocessing algorithm, the receiver calculates the measured value and standard value ofthe 3D coordinates of the laser spot. Then the information is transmitted throughtransmitting device, transducer and USB-485 to computer to predict and evaluate thehealth condition of the support structure of the tunnel so as to provide safety warninginformation. Provide timely and reliable data for the operation company to avoid theoccurrence of vicious accidents.

关键词： Operation tunnel support structure health data automation monitoring evaluation

Thermal structure of Glass Fiber Reinforce Plastic support structure

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Journal of Shanghai Jiaotong university(Science) 2008年第3期13卷 370-374页

作者：刘康汪荣顺石玉美顾安忠 Institute of Refrigeration and Cryogenic Engineering Shanghai Jiaotong University

The assembled form of thick-wall glass fiber reinforced plastics (GFRP) tube and 0Cr18Ni9 austenitic stainless steel pipes was designed as the radius thermal-insulating and load-supporting structure in cryogenic vessels. In order to study the thermal leakage and gap changes on the support structure, as well as radius temperature and stress distribution on GFRP tube, an experimental investigation has been taken. The results indicate that the support structure is proved to fit well as thermal-insulating and load-supporting part in cryo-genic vessels, furthermore has high security during cryogenic applications.

关键词： glass fiber reinforced plastics (GFRP) tube support structure cryogenic temperature stress

Investigation on the fatigue characteristic in support structure of HL-2M tokamak

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Investigation on the fatigue characteristic in support struc...

Design and Kinematics Analysis of support structure for Multi-Configuration Rigid-Flexible Coupled Modular Deployable Antenna

第十六届全国等离子体科学技术会议暨第一届全国等离子体医学研讨会

作者：曹诚志刘德权林涛乔涛 Southwestern Institute of Physics

In order to obtain enhanced plasma parameters the completely new tokamak HL-2M is now under construction in Southwestern Institute of *** has to assure the structural safety of the device during the entire operation cycle,one of the most important issues is the lifetime-limiting effects due to the pulsed run *** is one of the major failure modes to be considered in mechanical design,and pulsed operation imposes stress with significant alternating components on all the support structure(SS).Therefore, the reliability of the whole device is strongly affected by the stress and fatigue characteristic of the SS as the interface structure. This article introduces the SS design and details the fatigue life calculation methods based on the different characteristics of the *** fatigue life in hazardous areas of the toroidal field coils anti-torque structure(TFCs-ATs) has been determined by non-linear analyzed *** the stress-time history data of the vacuum vessel & poloidal field coils support structure(W&PFCs SS),the fatigue analysis of hot spot has been completed based on rain-flow counting method and linear cumulative damage method. The calculated minimum fatigue life on TFCs-ATs and W&PFCs SS are 4.743E+05 and 1.805E+06 cycles,*** the calculated fatigue life on sub-structures can meet the required life for HL-2M tokamak:1.0E+05 cycles.

关键词： HL-2M tokamak support structure Stress analysis Fatigue analysis

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Aerospace China 2021年第3期22卷 46-53页

作者： TIAN Dake FAN Xiaodong JIN Lu GUO Zhenwei GAO Haiming CHEN Hanting School of Mechanical Engineering Shenyang Jianzhu UniversityShenyang 110168 School of Civil Engineering Shenyang Jianzhu UniversityShenyang 110168

In order to meet the urgent need for diversified and multi-functional deployable antennas in many major national aerospace projects,such as interstellar exploration,the fourth phase of lunar exploration project,and the industrial application of Bei Dou,a deployable antenna structure composed of hexagonal prism and pentagonal prism modules is ***,the arrangement and combination rules of pentagonal prism and hexagonal prism modules on the plane were ***,the spatial geometric model of the deployable antenna composed of pentagonal prism and hexagonal prism modules was *** influence of module size on the antenna shape was then analyzed,and the kinematic model of the deployable antenna established by coordinate ***,the above model was verified using MATLAB *** simulation results showed that the proposed modular deployable antenna structure can realize accurate connection between modules,complete the expected deployment and folding functional *** is hoped that this research can provide reference for the basic research and engineering application of deployable antennas in China.

关键词： space deployable antenna support structure rigid flexible coupling kinematics analysis numerical simulation

Research on Temperature Field of the support structure for the Independent LNG Tank

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Hydro Science & Marine Engineering 2020年第1期2卷 33-39页

作者： Shifeng Ding Li Zhou Yajun Zhou Yingjie Gu Vladimir GTsuprik School of Naval Architecture and Ocean Engineering Jiangsu University of Science and TechnologyZhenjiangJiangsu212003China Shanghai Rules and Research Institute China Classification SocietyShanghai200135China School of Engineering Far Eastern Federal UniversityVladivostokPrimorskyi kraiRussia

The independent LNG(Liquified Nature Gas)containment is widely used for small or medium-sized LNG carrier and ship using LNG as *** common tank pattern includes single-spherical-cylindrical tank and double-spherical-cylindrical tank,which is the key to design the hull structure and its *** support is designed to connect the hull structure and LNG *** main functions are heat transferring and force *** paper focus on the temperature field distribution of hull and its support *** thermal boundary conditions are simulated according to the heat transfer action,such as thermal convection,heat conduction and thermal *** method on how to carry out thermal analysis is presented for an independent LNG *** case study is carried out with two typical independent LNG *** is a tank with double spherical cylindrical in the LNG carrier,and the other is a tank with single spherical cylindrical on the deck of the ship using LNG as *** result shows the method presented in this paper is a good reference for the structural design with independent LNG containment.

关键词： Temperature filed Heat transfer analysis Thermal convection support structure Independent LNG carrier

Stability influence factors analysis and construction of a deep beam anchorage structure in roadway roof

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International Journal of Mining Science and Technology 2018年第3期28卷 445-451页

作者： Xie Shengrong Gao Mingming Chen Dongdong Sun Yanding Pan Hao Su Hai Lan Shizhong Faculty of Resource and Safety Engineering China University of Mining and Technology Beijing Key Laboratory for Precise Mining of Intergrown Energy and Resources China University of Mining and Technology School of Mechanics and Civil Engineering China University of Mining and Technology Yuwu Coal Industry Group Co.Ltd. Shanxi Luan Mining Group

Deep beam anchorage structures based on spatial distribution analysis of the cable prestressed field have been proposed for roadway roof support, Stability and other factors that influence deep beam structures are studied in this paper using mechanical calculations, numerical analysis and field measurements, A mechanical model of deep beam structure subjected to multiple loading is established, including analysis of roof support in the return airway of S1203 working face in the Yuwu coal mine, China, The expression of maximum shear stress in the deep beam structure is deduced according to the stress superposition criterion, It is found that the primary factors affecting deep beam structure stability are deep beam thickness, cable pre-tension and cable spacing, The variation of maximum shear stress distribution and prestressed field diffusion effects according to various factors are analyzed using Matlah and FLAC3DTM software, and practical support parameters of the S1203 return airway roof are determined, According to the observations of rock pressure, there is no evidence of roof separation, and the maximum values of roof subsidence and convergence of wall rock are 72 and 48 mm, respectively, The results show that the proposed roof support design with a deep beam structure is feasible and achieves effective control of the roadway roof,

关键词： support structure Deep beam Maximum shear stress Influencing factors Stability control Roadway roof

The development of 3D printing technology and the current situation of controlling defects in SLM technology

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China Welding 2020年第3期29卷 9-19页

作者： Yin Yan Zhang Yuan Dong Kaiji Zhang Ruihua Chai Xutian State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals Lanzhou University of TechnologyLanzhou 730050China China Iron&Steel Research Institute Group Beijing 100081China Hardware Knife Cut Industrial Technology Research Institute Yangjiang Yangjiang 529533China

With unique manufacturing technology,the additive manufacturing technology divides the three-dimensional object into countless two-dimensional *** with the traditional material reduction manufacturing method,it has the characteristics of saving materials,being fast,and especially suitable for single and small batch parts and the rapid manufacturing of parts with complex shapes and internal *** this paper,various methods of additive manufacturing technology are *** paper introduces the characteristics of selective laser melting technology and its forming equipment *** this basis,the technical defects of selective laser melting technology are analyzed,and the status of controlling defects in SLM technology is *** the end,the prospects of additive manufacturing technology are described.

关键词： additive manufacturing technology selective laser melting density support structure

Variation of hydraulic parameters with different wing of a T-shape spur dike in bend channels

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Journal of Central South University 2018年第3期25卷 671-680页

作者： Mohammad Vaghefi Arash Ahmadi Behroz Faraji Department of Civil Engineering Persian Gulf University Department of Civil Engineering Ferdowsi University of Mashhad Department of Civil Engineering Razi University

In the present research,by using a numerical model,some analyses were performed on flows around a T-shape spur dike and a support structure located at its upstream under different wing to length ratios of T-shape spur dike in the order of 0.25,0.50,0.75 and *** order to verify numerical model,physical model data were used in presence of a single T shape spur *** from numerical model are desirably in agreement with those of physical one because the regression between both data is 0.86 up to *** this research,all hydraulic parameters of flows,streamlines and dimensions of flow separation zones were studied in order to select the most practical *** W/L results in 7%–12%increase in the length of flow separation zone and in 2%increase in the width of this zone compared to W/L=0.25.

关键词： numerical model wing of T-shape spur dike support structure flow pattern

Research on Two New Legform Impactors of UBM and aPLI for Pedestrain Protection Base on a SUV

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Research on Two New Legform Impactors of UBM and aPLI for Pe...